Physical Science Exam 2

measure of current

Ampere

Measure of Electrical Power

Watts

Compared to the motion of a water at 10 C, the molecules of water at 30 C are moving a)at the same speed b)faster c)slower

b

Convection currents in the air near a seashore are produced by a)shifting winds b)unequal heating of land and water c)varying temperatures d)none of the above

b

Every magnet contains at least a) 1 pole b) 2 poles c)more than two poles

b

For light, a red shift indicates the light source moves a)toward you b)away from you c)at right angles d)all of the above e)none of the above

b

Increasing the temperature of 50 grams of water by 1 degree Celcius requires a)1 calorie b)50 calories c)500 calories d)none of these

b

One main DIFFERENCE between gravitational and electric forces is that electric forces a)attract b)repel or attract c)obey the inverse-square law d)act over shorter distances e)are weaker

b

Relative to UV waves, the wavelength of infrared waves is a)shorter b)longer c)the same

b

The flow of charge in a circuit depends on a)adequate resistance b)potential difference c)adequate chemical action d)all of the above

b

The rapid alteration of an electric field induces a)a stronger electric field b)a magnetic field c)both d)neither

b

Two charged particles near each other are released. As they move, the force on each particle increases. Therefore the particles have a)the same sign b)the opposite sign c)not enough information

b

Two charged particles near each other are released. As they move, the force on each particle increases. Therefore, the particles have a)the same sign b)the opposite sign c)not enough information

b

Unlike electric charges, magnetic poles cannot be a) located b) isolated c) destroyed

b

When work is done BY a system and no heat is added, the temperature of the system a)increases b)decreases c)remains unchanged

b

When you remove electrons from a metal cup, the cup becomes a)negatively charged b)positively charged c)ionized d)none of the above

b

A magnetic force acts most strongly on a current carrying wire when it a) carries a very large current b)is perpendicular to the magnetic field c) either or both d) none of the above

c

Every proton in the universe is surrounded by its own a)electric field b)gravitational field c)both d)none of the above

c

Every proton in the universe is surrounded by its own a)electrical field b)gravitational field c)both e)none of the above

c

Heat is simply another word for a)temperature b)thermal energy c)movement of thermal energy d)radiant energy

c

If the same quantity of heat is added to both a 2-L and a 4-L container of water, the temperature change for water in the 4-L container will be a)the same as the 2-l container b)twice that of the 2-L container c)half that of the 2-L container

c

Moving electric charges will interact with a)an electric field b)a magnetic field c)both e)none of the above

c

The current through a 10 ohm resistor connected to a 120 V power supply is a)1A b)10A c) 12 A d)120 A

c

The power dissipated in a 4 Ohm resistor carrying 3 A is a) 7W b) 18 W c) 36 W d) 48 W e) none of the above

c

Thrust a magnet into a coil of wire and you'll induce a)voltage b)current c)both d)neither

c

To say that electric charge is conserved means that no case has EVER been found where a)the charge of an object has changed b)the net amount of charge on an objects has increased c)net charge has been created or destroyed d)none of the above

c

What is the smallest unit of measurement for temperature a) 1 Celcius degree b) 1 Kelvin c) 1 Farenheit degree d) all are the same

c

When the voltage across a steady resistance is doubled, the current a)is half b)remains the same c)is doubled d)is quadrupled

c

When you touch a piece of ice with your finder, energy flows a)from your finger to the ice b)from the ice to your finger c)both ways

c

All objects above 0K are a)liquids b)gas c)solid d)moving

d

The current in a 100 W bulb connected to a 120 V source is a) 0.5 A b) 1.2 A c) 12000 A d) none of the above

d

The process of convection occurs in a)solids b)liquids c)gases d)fluids e)all of the above

d

Which of the following is not a phase of matter a)solids b)liquids c)gases d)vacuum

d

Which of these has a higher frequency than visible light? a)radio wave b)microwave c)infrared wave d)ultraviolet waves

d

Which of these has the longest wavelength? a)orange b)blue c)yellow d)red

d

The current through a 10 Ohm resistor is 5 A. What is the voltage across the resistor? a) 5 V b) 10 V c) 15 V d) 20 V e) more than 20 V

e

The electric power of a lamp that carries 2 A at 120 V is a) 1/6 W b) 2 W c) 60 W d) 20 W e) 240 W

e

Two charges are separated by 1 m exert a 1 N force on each other. If the charges are pushed to .25 m separation, the force on each charge will be a) 1N b) 2N c) 4N d) 8N e) 16N

e

measure of electric potential

volts

Field generation cannot create a)light b)electromagnetic waves c)energy d)all of the above can be generated

C

Measure of electrical charge

Coulomb

Measure of frequency

Hertz

Measure of electric potential energy

Joules

Measure of speed

M/s

Measure of period

Seconds

As a siren approaches a stationary listener, the wave's frequency hear by the listener a)increases b)decreases c)does not change

a

As a siren approaches a stationary listener, the waves's frequency heard by the listener a)increases b)decreases c)does not change

a

As you comb your hair, electrons are rubbed onto the comb, which becomes a)negatively charged b)positively charged c)ionized d)none of the above

a

Both Radio and visible light have identical a)speeds b)wavelengths c) frequencies d)all of the above e) none of the above

a

Just as water flows from high low low pressure, electric charge flows from a)high to low voltage b)high charge concentration to low charge concentration c)high resistance to low resistance d)all of the above e)none of the above

a

More disorder means a) more entropy b)no real change in entropy c)less entropy

a

On which temperature scale is 0 degrees the freezing point of water a)Celcius b)Caloric c)Kelvin d)Farenheit

a

The amount of energy given to each coulomb of charge flowing through a 12 V battery is a)12 J b) 12 A c)12 V d)all of the above e)none of the above

a

The electric current in a cooper wire is normally composed of a)electrons b)protons c)ions d)all of the above

a

The electric force between charges is strongest when the charges are a)close together b)far apart c)either d)none of the above

a

The rapid alteration of a magnetic field induces a) an electric field b) a stronger magnetic field c)both d)neither

a

When work is done ON a system and no heat is added, the temperature of the system a) increases b) decreases c) remains unchanged

a

Which of the following is a longitudinal wave a)sound b)light c)radio d)all of the above e)none of the above

a

A POOR conductor of heat is a a)poor insulator b)good insulator c)neither

b

A pair of positively-charged plastic straws tend to a)attract each other b)repel each other c)neutralize each other d)none of the above

b

Both sound and light can travel in a)a vacuum b)water c)both d)none of the above

b

Compared to a giant iceberg, a hot cup of coffee has a)more thermal energy and higher temperature b)higher temperature but less thermal energy c)a greater specific heat capacity and more thermal energy d)none of the above

b

Measure of Amplitude

meters

measure of wavelength

meters