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WorksheetsCurrent and Resistance
Total questions: 12
Worksheet time: 36mins
The sphere of a Van de Graaff generator had 6.00 C of charge. When connected to the ground, it was discharged in 24.0 ms. What was the average discharge current? I=∆Q/∆t
240 A
250 A
260 A
270 A
A battery supplies a 0.015 A current to a small radio. How long should the radio stay on so that 4.80 C passes through each of the following parts of the circuit through the battery I=∆Q/∆t
300 s
310 s
320 s
330 s
An electrical device of 37.2 W resistance performs best when the current is 3.62 A. How much voltage should be applied? ∆V=R×I
131.66 V
132.66 V
133.66 V
134.66 V
Electric current in a wire is the
number of electric charges moving from one location to another in the wire.
net movement of electrical energy through the wire.
rate at which electric charges move through an area of the wire.
rate at which electrical energy is used to move charges through the wire.
One ampere of current is the movement of ______________ through a given area in one second.
one coulomb of charge
one volt of potential difference
one joule of energy
one electron
The diagram above represents a wire in which the net flow of electrons is to the right. The direction of the conventional current in the wire
depends on the potential difference.
is to the left.
is the same direction as the electron flow.
cannot be determined.
The speed at which an electron moves in an electric field in a conductor is the
speed of light.
average collision speed.
drift velocity.
average electron speed.
When a current moves through a copper conductor, electrons collide with copper atoms. The result of these collisions is
an increase in voltage.
a decrease in resistance.
an increase in temperature.
a decrease in voltage.
What is the potential difference across a 10 ohm resistor if the current in the resistor is 3.0 A? ΔV=R×I
0.3 V
3 V
30 V
15 A
The current of a non-ohmic material is plotted against the applied potential. How would you describe the resulting graph?
The graph will have a constant positive slope.
The graph will have a variable positive slope.
The graph will have a variable negative slope.
The graph will have a constant negative slope.
Which factor is least likely to affect the resistance of a conductor?
the length of the conductor
the temperature of the conductor
the overall shape of the conductor
the material the conductor is made from
A current of 295 A passes through an automobile starter motor. How long does the starter motor operate if 377 coulombs pass through the starter? I=ΔtΔQ
1.28 s
1.30 s
1.40 s
1.50 s
