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WorksheetsCurrent and Resistance
Total questions: 38
Worksheet time: 3hrs 10mins
Wire A has twice the cross sectional area of wire B. The resistance of wire B is __________________ wire A.
1/4 as much as
1/2 as much as
the same as
twice as much as
Which of the following are a result of the resistance to current?
Electric potential energy to be converted to other energy forms.
A reduction in current.
The wire to heat up.
All of the above.
The table describes four different resistance wires.
They are all made from the same metal.
Which wire has the smallest resistance?
A
B
C
D
Which equation can be used to calculate the resistance R of a resistor?
V = I / R
I = V x R
R = V x I
V = I x R
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
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
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
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.
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
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
An electric charge flows form
high energy to low energy
low energy to high energy
What is the role of an ammeter in an electric circuit?
To measure the amount of electric current in the circuit
To measure the amount of voltage in an electric circuit
To measure the amount of resistance in an electric circuit
What is the role of a voltmeter in an electric circuit?
To measure the amount of current
To measure the voltage in an electric circuit
To measure the energy of the current
If the length of a wire increases, the resistance ____________
a. decreases
b. increases
c. stays the same
d. unknown
What is the resistance if the current is 2A and the voltage is 10V?
8 Ω
20 Ω
12 Ω
5 Ω
A 3A current flows through a television. How long would it take for 1500C to flow through it?
4500s
500s
50s
450s
How much charge flows through a wire in 80s if the current is a constant 5.4A?
432C
360C
524C
344C
What is the resistance if the voltage is 10V and the current is 2A?
20 Ω
5 Ω
12 Ω
8 Ω
What is the resistance if the current is 2A and the voltage is 10V?
8 Ω
20 Ω
12 Ω
5 Ω
A potential difference of 24 V is applied to a 150 resistor. How much current flows through the resistor?
0.15 A
3600 A
6.25 A
0.16 A
What potential difference is required across an 8.0-Ω resistor to cause 2.0 A to flow through it?
4.0 V
16 V
8.0 V
32 V
The voltage supplied to a circuit is 17 V and the current running through is 10 A. What is the power generated?
170 W
170 A
1.7 V
1.7 W
Calculate the POWER supplied by a 12A current flowing through a 20Ω resistor.
4800
2880
2000
What is the potential difference across a 10 ohm resistor if the current in the resistor is 3.0 A?
0.3 V
3 V
30 V
15 V
