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WorksheetsCircuits and Resistance
Total questions: 21
Worksheet time: 28mins
A
B
C
D
The resistance of a wire depends on its length l and on its cross-sectional area A.
The resistance is
directly proportional to l and directly proportional to A
directly proportional to l and inversely proportional to A
inversely proportional to l and directly proportional to A
inversely proportional to l and inversely proportional to A
A
B
C
D
A
B
C
D
A
B
C
D
the e.m.f. of the battery
the length of the connecting wires
the resistance of the resistor
the temperature of the resistor
a capacitor
a closed switch
an open switch
a resistor of constant resistance
A
B
C
D
A student carries out an experiment to investigate the resistance of a resistor R. She takes a series of readings of potential difference (p.d.) and current, and plots of a graph of her results.
Which circuit should she use?
A
B
C
D
It decreases from 12 V to 0 V
It decreases from 0 to 12 V
It remains at 0 V
It remains at 12 V
A
B
C
D
A
B
C
D
It decreases from 12 V to 0 V
It decreases from 0 V to 12 V
It remains at 0 V
It remains at 12 V
Copper wire is available in fixed lengths but in various diameters d. Each diameter has a different resistance R.
Which relationship between R and d is correct?
R is directly proportional to d
R is directly proportional to d2
R is inversely directly proportional to d
R is inversely directly proportional to d2
A
B
C
D
A metal wire of length 100 cm and cross-sectional area 0.02 mm2 has a resistance of 8.0 Ohm.
What is the resistance of a wire of the same metal of length 500 cm and cross-sectional area of 0.40 mm2?
2.0 Ohm
8.0 Ohm
16 Ohm
32 Ohm
There is a current of 2.0 A in a resistor for 30s. The potential difference across the resistor is 12V.
How much energy is transferred in the resistor?
1.25 J
5.0 J
180 J
720 J
A copper wire has a resistance of 2.0 Ω.
A second copper wire is twice as long as the first wire, and its diameter is twice the diameter of the first wire.
What is the resistance of the second wire?
1.0 Ω
2.0 Ω
8.0 Ω
16.0 Ω
A
B
C
D
The p.d. across a car headlamp is 12 V. The current in the lamp is 2.5 A.
How much energy is transferred by the lamp in 1.0 hour?
1800 J
1800 W
108 000 J
108 000 W
