physics 1

An object is moving in a circular path of radius 3.5 m. If it completes one full cycle, what will be the displacement? A) 0 B) 3 C) 6 D) 9.42

A) 0

A force ( F ) with a value of 10N acts on 3 objects as represented in the figure, if you know that the masses of these objects respectively are 5kg, 3 kg, 2kg then the acceleration (in m/s2 ) of the objects is... A) 1 B) 2 C) 3.3 D) 5

A) 1

If the speed of light in a medium equals to 3 ×10 8m/s then the refractive index of the medium is equal to......... A) 1 B) 2 C) 0.6 D) 1.5

A) 1

A device has a power of 16 W and a resistance of 4 Ω what is the strength of the current passing through it? A) 2 A B) 4 A C) 20 A D) 64 A

A) 2 A

If a battery with a voltage of 40 V is connected to a 20Ω resistor. Determine the current passing through the circuit A) 2 amperes B) 8 amperes C) 20 amperes D) 0.5 amperes

A) 2 amperes

An electrical transformer has a number of turns. The primary winding is 300 turns, the secondary winding is 8000 turns, the primary winding reached an alternating voltage of 90V. Calculate the voltage of its second winding ... A) 2400V B) 1200V C) 120V D) 12V

A) 2400V

If you shout into the Grand Canyon, your voice travels at the speed of sound (340m/s) to the bottom of the canyon and back, and you hear an echo. How many km deep is the Grand Canyon at that spot if you can hear your echo 5.2 seconds after you shout? A) 343 metres B) 300 meters C) 65 metres D) 1768 metres

A) 343 metres

If the force acting on a particle with a charge of 3.9x10^-9 C as a result of being affected by another charged particle 3cm away from it is equal to 12x10^-5 N. The charge of the second particle is ..? A) 4x10^−9 C B) 4x10^−5 C C) 4.5x10^2 C D) 1.3x10^3 C

A) 4x10^−9 C

A 30N force acts on a box with a mass of 3kg from the east. Calculate the frictional force if the coefficient of the kinetic friction is 0.2. (g=10m/s2 ) A) 6N B) 60N C) 18N D) 3N

A) 6N

composite particles consisting of two protons and two neutrons tightly bound together A) Alpha rays B) Beta rays C) Gamma rays D) Ultraviolet rays

A) Alpha rays

Air flight is an application of .........theorem. A) Bernoulli's B) Archimedes' C) Pascal's D) Heisenberg's

A) Bernoulli's

If the acceleration of a car is zero, it is moving with ........ speed A) Constant B) Decreasing C) Increasing D) Changing (variable)

A) Constant

If you know that the electric force exchanged between two charges q1, q2 is represented by the relationship F =k q1 q2 /r2, if the distance between them increases to twice the original distance, the new force equals... A) F/4 B) F/2 C) 2F D) 4F

A) F/4

Which of the following transitions emits a photon with the highest frequency? A) From E3 to E1 B) From E4 to E3 C) From E3 to E2 D) From E2 to E5

A) From E3 to E1

Which of the following transitions results in a photon with the largest wavelength? A) From E4 to E3 B) From E3 to E1 C) From E3 to E2 D) From E5 to E2

A) From E4 to E3

Which of the following forces represents a field force? A) Gravity B) Pushing C) Friction D) Pulling

A) Gravity

It is not possible to measure the momentum of an object and determine its exact position at the same time" A) Heisenberg's B) De Broglie's C) Einstein's D) Compton's

A) Heisenberg's

The main factor in determining the stability of an atom is its..................ratio A) Neutrons to protons B) Neutrons to electrons C) Protons to electrons D) Electrons to neutrons

A) Neutrons to protons

A particle that has the same mass as an electron and the opposite sign of its charge is... A) Positron B) Antiproton C) Neutron D) Anti-neutrino

A) Positron

Which of the following doesn't affect mirage formation? A) Reflection B) Refraction C) - D) Hot surface

A) Reflection

Capacitance expresses... A) The amount of electrical charge stored at a certain voltage difference B) The intensity of the electric current passing through the resistance C) The ability of an electrical device to withstand electric shocks D) The number of electrons in the energy beams

A) The amount of electrical charge stored at a certain voltage difference

The atomic mass of an element is equal to... A) The average masses of its isotopes B) The mass of its isotope with the largest mass C) The mass of its isotope with the smallest mass D) The mass of its isotope with the greatest density

A) The average masses of its isotopes

If the net force acting on an object is equal to zero, and the resultant moment acting on it is equal to zero; this means... A) The body is in translational equilibrium and is in rotational equilibrium. B) The body is in translational equilibrium and not in rotational equilibrium. C) The body is neither in translational equilibrium nor rotational equilibrium. D) The body is not in translational equilibrium and is in rotational equilibrium

A) The body is in translational equilibrium and is in rotational equilibrium.

If you lift a book off a table and then put it back in place, you are not doing any work because... A) The displacement is equal to zero. B) The force exerted is equal to zero. C) - D) The energy exerted is equal to zero

A) The displacement is equal to zero.

the maximum displacement or distance moved by a wave measured from its equilibrium position. A) Wave amplitude B) Cyclic time C) Frequency D) Wave length

A) Wave amplitude

The intensity of the sound depends on the.... A) amplitude B) speed C) loudness

A) amplitude

It can be said that an object is in a state of acceleration if... A) the velocity changes B) the speed decreases C) the direction changes D) the speed and direction are fixed

A) the velocity changes

If an object is placed 12 cm away from a concave lens, and its focal length is 6 cm, it will form an imaginary image ....... cms away from the lens. A) -18 B) -4 C) 8 D) 20

B) -4

If a lamp has a power of 5 W and a voltage difference of 20V between the two terminals, the current through it is ....... amperes A) 0.025 B) 0.25 C) 2.5 D) 25

B) 0.25

if ahmad drinks 3 deciliters of milk, the amount he drank in liters is.... A) 3 B) 0.3 C) 0.003 D) 0.0003

B) 0.3

A machine does 70 J of work in 3.5 seconds, what is the power of the machine ? A) 0.05 W B) 20 W C) 73.5 W D) 245 W

B) 20 W

A full rotation in radians is equal to... A) π B) 2π C) 360° D) 400°

B) 2π

If a force of 60N acts on an object with a mass of 15kg, the acceleration of the object is... A) 0.25m/s2 B) 4m/s2 C) 45m/s2 D) 900m/s2

B) 4m/s2

What does 6 μm equal in meters? A) 6 × 10^6 B) 6 ×10^−6 C) 6 × 10^9 D) 6 × 10^−9

B) 6 ×10^−6

The charge of a flashlight when the number of excess electrons is 4.8x10 10 is equal to.... (e=1.6x10 −19 C ) A) 4.8 x 10^−10 B) 7.7x10^−9 C) 3.3x10^−3 D) 1.3x10^−2

B) 7.7x10 −9

Sound travels from the source to the listener due to..... A) Change in air density B) Change in air pressure C) Change in air velocity D) Change in air temperature

B) Change in air pressure

The theoretical importance of energy belts lies in understanding..... A) Electrical voltage B) Electrical conductivity C) Electric field D) Electrical capacity

B) Electrical conductivity

the surface face of a column of mercury curves upwards like a drop because the force of cohesion is A) Less than the force of adhesion B) Greater than the force of adhesion C) equal to the force of adhesion D) Non-existent

B) Greater than the force of adhesion

The SI unit of length is.... A) Centimeter. B) Meter. C) Kilometer. D) Millimeter.

B) Meter.

The conductor electrical resistance is inversely proportional to.. A) Its length B) Sectional area C) Its temperature D) Type of material

B) Sectional area

The only tool currently available for studying the constituents of stars over a large space is... A) Spacecraft B) Spectroscopy ( Spectral analysis or Spectrum analysis) C) Giant Telescopes D) Proton shells (proton rocket)

B) Spectroscopy ( Spectral analysis or Spectrum analysis)

When the energy of the atom is at the lowest permissible amount, it is said to be in the............state A) Excited B) Stable C) Changing D) Emission

B) Stable

What type of liquid flow obeys Bernoulli's equation A) - B) Steady flowing liquids

B) Steady flowing liquids

What allows some insects to walk on water? A) Viscosity B) Surface tension C) Capillary action D) Buoyancy force

B) Surface tension

The displacement of the scattered photons A) De Broglie waves B) The Compton Effect C) Photoelectric effect D) The Heisenberg Principle

B) The Compton Effect

Which of the following statements is incorrect When a player hits a ball........... A) The force exerted by the player on the ball equals the force exerted by the ball on the player B) the force exerted by the player on the ball is greater than the force exerted by the ball on the player C) The two forces are opposite in direction

B) the force exerted by the player on the ball is greater than the force exerted by the ball on the player

calculate the charge on a neutral body when 4 electrons are added to it A) + 6.4x10^−14 B) +0.4x10^−14 C) -6.4x10^−14 D) -0.4x10^−14

C) -6.4x10^−14

Saad uses a 0.1 kW light bulb for a period of 12 hours. How much electrical energy is consumed (in kWh)? A) 120 B) 12 C) 1.2 D) 0.12

C) 1.2

if an electrical current with an intensity of 5 mA flows through a 50 Ω electrical resistor the power depleted in the resistance is .... A) 2.5x10^−3 watts B) 2x10^−3 watts C) 1.25x10^−3 watts D) 1x10^−3 watts

C) 1.25x10^−3 watts

What is the battery voltage (in volts) required to generate 0.003 Amperes electric current in a diode connected to a resistor of 500Ω, given that the drop in the diode device is 0.5V? A) 1 B) 1.5 C) 2 D) 3

C) 2

If you know the speed of light in the air is 3 ×10 8m/s what is its speed in a glass in which the refractive index is 1.5? A) 2 ×10^3m/s B) 4.5 ×10^3m/s C) 2 ×10^8m/s D) 4.5 ×10^8m/s

C) 2 ×10^8m/s

A photon of energy 4eV is incident on a metal surface whose work function is 2eV. The minimum reverse potential to be applied for stopping the emission of electrons is A) 6V B) 4V C) 2V D) 8V

C) 2V

When an object completes a full rotation, its angular displacement in radians equals.... A) 0.5π B) 0.6π C) 2π D) π

C) 2π

The velocity of an object changes from 4 m/s to 7.5 m/s in one second. Calculate the acceleration in (m/s2) A) -11.4 B) -3.5 C) 3.5 D) 11.5

C) 3.5

If the fundamental frequency of a 0.5 meters long pipe closed at one end is 150 Hz. The speed of sound in m/s is equal to ...... A) 200 B) 250 C) 300 D) 75

C) 300

A 0.5 kg piece of metal with a specific heat capacity of 376 j/kg drops in temperature by 20k, calculate the amount of energy lost A) 15040 J B) 7520 J C) 3760 J D) 1880 J

C) 3760 J

In a double slit experiment, the distance between the slits is 3 mm and the slits are 2 m away from the screen. Two interference patterns can be seen on the screen one due to light with wavelength 480 nm, and the other due to light with wavelength 600 nm. What is the separation on the screen between the fifth order bright fringes of the two interference patterns? A) 0.04 x 10^−5 m B) 4 x 10^5m C) 4 x 10^−4 m D) 4 x 10^−5m

C) 4 x 10 −4 m

A current of 6A is flowing into a wire of length 1.5 m vertically positioned by a uniform magnetic field of 0.5 T, How strong is the force acting on the wire? A) 3 N B) 4 N C) 4.5 N D) 6 N

C) 4.5 N

A frequency of 4.5 MHz in Hz is ..... A) 4.5 × 10^3 B) 4.5 × 10^4 C) 4.5 × 10^6 D) 4.5 × 10^9

C) 4.5 × 10^6

Which of the following is an example of a vector quantity? A) A car moving with a speed of 30 km/h. B) Pushing a cart with a 70 N force. C) A rock falling downwards with a speed of 9 m/s. D) A swimmer swimming a distance of 800 m.

C) A rock falling downwards with a speed of 9 m/s

The nucleus has a core charge of e, if you know that the number of its protons is A and the number of its neutrons is B, then the amount of the total charge is equal to... A) e/B B) e/A C) A × e D) B × e

C) A × e

the angle in radians through which a point or line has been rotated in a specified sense about a specified axis is known as.... A) Angular frequency B) Angular acceleration C) Angular displacement D) Angular velocity

C) Angular displacement

the ability of a liquid to flow in narrow spaces without the assistance of external forces A) Pascal principle B) Surface tension C) Capillary action D) Gravity

C) Capillary action

The shape of a magnetic field around a straight wire carrying a current... A) Oval rings B) Elliptical rings C) Circular rings D) Helical rings

C) Circular rings

If length is a scalar quantity then area is a.... A) - B) - C) Derived quantity

C) Derived quantity

If P was the luminous flux and r was the distance from the source of radiation; The lighting E is.... A) Directly proportional with P and r2 B) Inversely proportional with P and r2 C) Directly proportional with P and inversely proportional with r2 D) Inversely proportional with P and directly proportional with r2

C) Directly proportional with P and inversely proportional with r2

The energy stored in an elastic band is... A) Kinetic energy B) - C) Elastic potential energy D) Mechanical potential energy

C) Elastic potential energy

Which of the following radiations does not have an electrical charge? A) Alpha B) Positron C) Gamma D) Beta

C) Gamma

The lux unit is used to measure... A) Polarization. B) Light Intensity. C) Luminous intensity D) Luminous flux

C) Luminous intensity

Which of the following represents a simple harmonic movement? A) The rotation of a clock's hands B) Projectile moving C) The swinging of the pendulum D) Electron transmission

C) The swinging of the pendulum

If the vibration energy of an atom changes from to 5hf 3hf , then the atom ..... A) emits 8hf power B) absorbs 8hf energy C) emits 2hf power D) absorbs 3hf energy

C) emits 2hf power

The sum of the forces acting on an object is not equal to zero if the object is ... A) in kinetic equilibrium B) in static equilibrium. C) traveling at a constant speed in a circular path. D) traveling at a constant speed in a straight line.

C) traveling at a constant speed in a circular path.

The image formed by a flat mirror appears A) Real, equal to objects height B) Real, small C) virtual, equal to objects height D) virtual, small

C) virtual, equal to objects height

A mechanical energy transfer takes place when A) - B) - C) work is done by a force over a displacement

C) work is done by a force over a displacement

in a double slit experiment, the distance between the slits and the screen is calculated by the equation A) xdλ B) λd/x C) xd/λ D) λx/d

C) xd/λ

The wavelength symbol is... A) α B) σ C) λ D) δ

C) λ

An object moving in a horizontal circular path has a mass of 0.8kg and is attached to the end of a massless rope that has a length of 2m, If the object's speed is 2m/s then the tension in the rope is equal to .... A) 7.84 N B) 4 N C) 32 N D) 1.6 N

D) 1.6 N

If the potential difference between two points was 2.5V, what is the work done in moving 5 coulombs of charge between the two points A) 2 B) 2.5 C) 7.5 D) 12.5

D) 12.5

If the coefficient of the kinetic friction between an object with a weight of 50N and the surface touching it is 0.25; the frictional force between the object and the surface is... A) 200N B) 50.25N C) 49.75N D) 12.5N

D) 12.5N

An object moves from rest with a constant acceleration of 2m/s2 , its speed after 7 seconds is...? A) 3.5 m/s B) 3 m/s C) 9 m/s D) 14 m/s

D) 14 m/s

A house consists of ten rooms, each room with five lamps, and each lamp has a power of 100 W, if all the lights are lit for a minute, the energy consumed in joules is equal to.... A) 0.3 k B) 3 k C) 30 k D) 300 k

D) 300 k

5 kilowatts/hour (kWh) is equal to.... A) 1 watt for 5 hours B) 1000 watts for 1 hour C) 5000 watts for 5 hours D) 5000 watts for 1 hour

D) 5000 watts for 1 hour

5kJ of work is done when a machine lifts a box 10m off the ground, what is the box's mass in Kg ? (g= 9.8m/s2 ) A) 15 B) 16 C) 48 D) 51

D) 51

If a bicycle accelerates from rest at a constant rate 4 ;after how m/s2 many seconds does its speed reach 24 m/s? A) 96 B) 28 C) 20 D) 6

D) 6

A car accelerates from rest at a constant rate 5m/s2 ,the time required for its speed to reach 30 m/s is equal to...? A) 150 s B) 35 s C) 25 s D) 6 s

D) 6 s

An ideal transformer has a number of turns, its primary winding is 200 turns and the current passing through it is 20A, if the number of turns of its secondary winding is 50 turns, then the amount of current through it ... A) 5 A B) 20 A C) 40 A D) 80 A

D) 80 A

The number of vibrations per second represents... A) Cyclic time B) Phase C) Wave length D) Frequency

D) Frequency

A device used to measure very small electric currents A) Voltmeter B) Ammeter C) Electroscope D) Galvanometer

D) Galvanometer

Half of a concave mirror's radius is 24 cm, if an object is at a distance of 15cm away from the mirror, the image is formed ......... A) On the focal point B) Between the center of curvature and the focal point C) Behind the mirror D) On the center of curvature

D) On the center of curvature

a property applying to transverse waves that specifies the geometrical orientation of the oscillations.... A) Diffraction B) over lapped light C) Light scattering D) Polarization of light

D) Polarization of light

When an unstable nucleus loses energy by emitting radiation in an automatic process) A) Photodegradation B) Atomic decomposition C) Natural decomposition D) Radioactive decay

D) Radioactive decay

Which of the following affects the pressure? A) density B) mass C) - D) Temperature

D) Temperature

If a person's weight is 160N, then which of the following statements is incorrect? A) - B) - C) - D) The person has a mass of 160 kg

D) The person has a mass of 160 kg

........ occur when a disturbance causes oscillations perpendicular to the propagation A) Longitudinal waves B) Longitudinal mechanical waves C) sound waves D) Transverse mechanical waves

D) Transverse mechanical waves

An object has a weight of W and a mass of M on the surface of earth, when its further away from earth's surface..... A) M decreases and W stays the same. B) Both M and W increase C) W decreases and M increases D) W decreases and M stays the same

D) W decreases and M stays the same

a system that converts heat or thermal energy to mechanical energy A) Electric coil B) electric engine C) magnetic coil D) heat engine

D) heat engine

The moment arm is... A) - B) - C) - D) the perpendicular distance from an axis to the line of action of a force.

D) the perpendicular distance from an axis to the line of action of a force.