Physics Semester 2 Review

When a switch is closed in a primary circuit, which of the following will not happen>

The circuit is closed, there is no electrical flow

The direction of electric field lines shows

The direction of the force on a test positive charge

Which of the following does not characterize electromagnetic waves.

The electric field is parallel to the magnetic field in the waves.

Which of the following is a correct statement?

The force on the wire is maximum when the current is perpendicular to the magnetic field lines

Faraday's Law states that the induced voltage in a coil is proportional to the product of three things. Which of the following is not considered one of them?

The thickness of the insulation on the loop

Why does the total circuit resistance decrease when more devices are added to a parallel circuit?

There are more paths for electron flow

Standing on the pier at Eagle Mountain lake, what impact does refraction have on items in the water?

They appear shallower

What is meant in the phrase "short circuit"?

This is when you bypass the normal route of the current flow

In a good insulator, electrons are usually

Tightly bound in place

What is the name of a device that can increase or decrease voltage through magnetic induction?

Transformer

Waves associated wiith the electromagnetic spectrum are referred to as

Transverse Waves

The bottom of a wave is known as

Trough

A mirage is an image produces by the refraction of light in the Earth's atmosphere (true/false)

True

Electric charge is neither created nor destroyed, but can be rearranged (true/false)

True

Electricity will always do its best to find the easiest way to ground (true/false)

True

Even though a car may be struck by lightning, people inside the car will be safe as long as they do not touch any metal (true/false)

True

Force vectors always move away from positive charges (true/false)

True

The difference between a piece of ordinary iron and iron magnet is the alignment of the magnetic domains (true/false)

True

The energy a charge possesses by virtue of its location is called electrical potential energy (true/false)

True

The sky is blue because its component particles scatter high frequency light (true/false)

True

The speed of sound is totally dependent on the elasticity of the medium (true/false)

True

Voltage is induced whether the magnetic field of a magnet moves past a stationary conductor, or the conductor moves through the magnetic field (true/false)

True

When a charge is place on an electric field, the charge will experience a force (true/false)

True

The production of electricity that we use in our homes, is the result of power plants using steam or water to push paddle wheels called ___?___

Turbines

How many different kinds of forces would act on a proton placed in both an electric field and a gravitational field?

Two

What term is used to identify frequencies higher than our ability to hear?

Ultrasonic

What component of electricity is considered the "pressure"?

Voltage

If a galvanometer is calibrated to measure electric potential, it is called ___?___

Voltmeter

Which of the following statements is considered correct concerning magnets and their fields?

Where the magnetic lines of force are close, the field strength is strong

What colour would you see if the coat you are looking at absorbs red, blue, green, orange, and violet?

Yellow

Which of the following is not a primary colour of light?

Yellow

Which of the following is the secondary color for a mixing of RED and GREEN light?

Yellow

Suppose a hollow metal sphere has a large negative charge on it. The electric field strength inside the sphere is

Zero

If an image can be projected on a screen at AMC theaters, what does this tell you about the theaters projector?

d (the projector has at least one convex lens which creates a real image that exhibits converging light rays that are inverted. As a result the image in the projector is upside down)

The net charge of a non-ionized atom

is zero

What type of current is found in most American homes?

Alternating current

Why do smooth metal surfaces make good mirrors?

Because it is not rough

If you break a bar magnet in half, each half

Becomes a bar magnet with 2 poles

Coulomb's law says that the force between any two charges depends

Both of the above are correct (directly on the magnitude of the charges/inversely on the square of the distance between the charges)

An electric field has

Both of the above are correct (magnitude/direction)

The number of waves per unit of time is known as

Frequency

In order to see a rainbow, what do you need to make sure?

Make sure you are between 40 degrees and 42 degrees with the light source behind you

Who discovered the speed of electromagnetic waves?

Maxwell

Atomic nuclei of almost all atoms consist of

Protons and Neutrons

What is the unit of power for electricity?

Watts

The distance from one crest to the next crest is known as

Wave Length

In a transformer, if the primary voltage is identified at 6 volts. The number of turns in the primary side is 2 turns and the secondary is 10 turns. What is my expected voltage on the secondary side?

30 volts

Which of the following represents the number of times each second alternating current changes its magnitude and direction in North America

60

As discussed in class, the best definition of a wave would be

A disturbance

As long as the switch is closed in the primary circuit, which of the following is going to happen?

A magnetic field will exists around the secondary coil

Electricity that flows in only one direction?

AC

If two negative charges are held close together and then released, the charges will

Accelerate away from each other

What phrase is used when mixing frequencies in order to produce a desired colour of light?

Additive Mixing

Working as a stage crew for the production of "The Fantasticks", you assemble the lighting necessary to reflect the mood of the scene. As a result, you make sure you have plenty if lights of red, blue, and green in case of a burn-out. You know this because the mixing of lights is a physic's principle known as ...

Additive Mixing

Who identified that light behaved as a particle as well as a wave?

Albert Einstein

Who was the American that identified the speed of light and received the Nobel Prize in physics in 1907?

Albert Michelson

If an alpha particle with two positive charges and a less massive electron come close together, both will experience an increase in

All of the above are correct

If a galvanometer is calibrated to measure current, it is called ___?___

Ammeter

The distance from the midpoint of a wave to the top of a wave is known as

Amplitude

When discussing the concept of light, how is "brightness" measured? By observing ...

Amplitude

When discussing the concept of sound, how is "loudness" measured? By observing ...

Amplitude

What is the unit of measure for current?

Amps

What is the law of reflection?

Angle of incidence is equal to the angle of reflection

The crest and trough are also known

Antinode

A bright white light approaches you, the frequency of light "pushes" against itself along its path. The approaching light will increase the frequency that you see and alter the light quality. This is known as

Blue Shift

As defined by our text book, when the crest of a sound wave overlaps at the edges by a moving object it produces a v-shaped pattern. The resulting wave is known as

Bow Wave

What unit is used when referring to amplitude of light?

Candles

In order for electrons to flow, a circuit must be ___?___

Closed

As defined by our textbook, a pulse of compressed particles in the transmission of sound is known as a/an

Compressional Wave

What type of lens is represented in the diagram? (caves in)

Concave

Waves are additive. As a result, a combination of wave at the same frequency that line up on top of each other would be an example of

Constructive inference

The earth's magnetic field is most likely due

Convection currents in the molten part of the earth's interior

What type of lens is represented in the diagram? (caves out)

Convex

The top if a wave is known as

Crest

If one of three lights blows out when connected in parallel, what happens to the current in the other two?

Current continues to flow

What is the unit of measure for the amplitude of sound?

Decibels

What unit is used when referring to amplitude focusing on sound?

Decibels

Waves are additive. As a result, a combination of wave at the same frequency that do not line up on top of each other would be an example of

Destructive Interference

When a wave source approaches, an observer encounters waves of a higher frequency. As the wave source passed the observer the frequency decreases. This is known as

Doppler Effect

The lights in the circuits below are all identical. Rank the circuits according to the size of the equivalent resistance for each, from most resistance to least.

E-B-D-A

The charge distribution in some molecules is permanently separated in two regions. Such molecules are called

Electric Dipoles

Which of the following has the potential to move first?

Electron

Which of the following is more important in terms of a material's overall magnetic field?

Electrons spin about their own axis

The power in a transformer is the rate at which ___?___ is transferred from one coil to the other in a transformer

Energy

In a vacuum, electromagnetic waves travel at speeds...

Equal to the speed of light

Suppose you touch a negatively charged object to a metal sphere so that the electrons move from the charged object onto the sphere. After separation of the charged object, electrons on the sphere will be

Evenly distributed on the sphere

Why will too many electric devices operating at one time often blow a fuse or trip a beaker?

Excess current is drawn by the devices and exceed the upper limit of the fuse

A conducting wire experiences no deflection force by a magnetic field as long as the wire carries a current (true/false)

False

A material is a good insulator if outer electrons of atoms in the material are free to roam around (true/false)

False

Almost all energy today is sold in the form of DC current because of the ease with which it can be transported from one place to another in high power transmission lines.

False

Electrons and protons have the same charge and therefore attract each other (true/false)

False

If a current carrying wire is bent into a loop, the magnetic field inside the loop will cancel to zero (true/false)

False

The direction of lines of force shows how large a force will be on a charge placed in an electric field (true/false)

False

The magnetic pole in the Northern Hemisphere is located at the geographic North Pole

False

The unit of electrical potential energy is the joule (true/false)

False

When an object is changed by induction, electrons flow from the ground onto the object or from the object to the ground (true/false)

False

When discussion the concept of light, how is "colour" measured? By observing ...

Frequency

when discussing the concept of sound, how is "pitch" measured? By observing ...

Frequency

A machine that produces an electric current by rotating a coil within a stationary magnetic field is known as ...

Generator

Which of the following ways will not disrupt a magnetic alignment within a magnet?

Getting a magnet wet

Is electric resistance greater in a short fat wire or a long thin wire?

Greater in a long thin wire

Which of the following is not a primary colour of paint?

Greem

In order for electricity to flow, electrons will always see out ___?___

Ground

What unit is used when referring to frequency?

Hertz

A wave that is incoming (before it bounces off anything) is known as a/an

Incident Wave

A small positively charged object near a positively charged sphere is moved closer to the sphere. The electrical potential energy of the small object

Increases

The reason a charged balloom will stick to a wall is that

Induced opposite charges in the wall are closer than other wall charges

What term is used to identify frequencies lower than our ability to hear?

Infrasonic

Which of the following is considered another name for the generator effect?

Law of induction

In a step-up transformer, the number of coils in the primary side will be _______ than/to the secondary side.

Less

If you put a small compass in a magnetic field, the compass will....

Line up in a direction parallel to the magnetic field

Waves associated with sound are known as

Longitudinal waves

The discrepancy between the orientation of a compass and true north is called ___?___

Magnetic declination

The cluster of atoms with their magnetic fields aligned is known as a/an ___?___

Magnetic domains

The area around the magnet is known as ___?___

Magnetic fields

The phenomenon of producing a current by using a magnetic field is known as ____?

Magnetic induction

The regions that produce magnetic forces are called ___?___

Magnetic poles

Which of the following teams of scientists are credited with the discovery that an electric current can be produced in a wire simply by moving a magnet into and out of a wire coil?

Maxwell and Newton

A positive ion has

More protons than electrons

The point of a wave that crosses the midpoint of a wave as it moves is known as

Node

Which of the following terms refer to the stationary points on a standing wave along the rest line?

Node

If a transformer increased AC voltage, it will also increase?

None of the above

What is the name of the law that is reflective in V=IR?

Ohm's

The common Hydrogen atom consist of

One proton and one electron

Which of the following best explains why you are safe in an airplane in flight if struck by lightning?

Only A and B are correct

What term describes the inability of light to pass through an object?

Opaque

Which of the following is the secondary color for a mixing of RED and YELLOW paint?

Orange

Electrical potential energy is the energy a charged object has because of its

Position

Which of the following is the correct way to jump a dead battery in a car?

Positive of the good to positive bad, negative of good to frame of the car with the dead battery

The flow of electricity is based on ...

Potential difference between positive and negative areas

Dealing with electricity, the rate of doing work is known as ...

Power

Which of the following is a secondary color for a mixing of RED and BLUE paint?

Purple

What is the lowest frequency on the Electromagnetic spectrum?

Radio

As defined by our textbook, a pulse of "low-pressure" particles in the transmission of sound is known as a/an

Rarefactional wave

A bright white light passes you, the frequency of the light "pushes" against itself along its path. The light leaving you will decrease the frequency that you see and alter the light quality. This is known as

Red shift

What type of telescope is represented in the diagram?

Reflective Telescope

A wave that bounces off an object is known as a/an

Reflective Wave

The North pole of a magnet is placed near the North pole of another magnet. The magnetic force between the 2 magnets will ...

Repel

What term is used to describe electrical pathways?

Schematic Diagrams

____?____ is when an object moves faster than the speed of sound and is heard as a sonic boom

Shock Waves

What term is used to identify the speed of a vehicle that travels slower than the speed of sound?

Subsonic

MIxing paint or other pigments together is allowing us to see colors based on the dyes used. But this type of mixing in physics is known as ...

Subtractive Mixing

What type of material will have resistance close to zero at very cold temperatures?

Superconductor

What term is used to identify the speed of a vehicle that travels faster than the speed of sound?

Supersonic

Which theory of light is photon more consistent with?

The Particle Theory

Which of the following would be considered he most typical voltage fir a step-down transformer to release into our homes and local businesses?

120 volts

As electricity leaves our power plants (ours is at Lake Arlington), the voltage in the transmission lines would be close to ...

120,000 volts

The protection from damaging rays which is known to cause skin cancer can be done with an SPF as low as ___?___

15