9702 Current Potential Difference & Power Quiz

Question 1 of 10

1

The diagram shows the symbol for a wire carrying a current I.

What does this current represent?

Select one of the following:

A the amount of charge flowing past a point in XY per second
B the number of electrons flowing past a point in XY per second
C the number of positive ions flowing past a point in XY per second
D the number of protons flowing past a point in XY per second

Explanation

Question 2 of 10

1

Which amount of charge, flowing in the given time, will produce the largest current?

Select one of the following:

A
B
C
D

Explanation

Question 3 of 10

1

A 12 V battery is charged for 20 minutes by connecting it to a source of electromotive force (e.m.f.).
The battery is supplied with 7.2 × 104 J of energy in this time.

How much charge flows into the battery?

Select one of the following:

A 5.0 C
B 60 C
C 100 C
D 6000 C

Explanation

Question 4 of 10

1

A particle has a charge of 4.8 × 10–19 C.
The particle remains at rest between a pair of horizontal, parallel plates having a separation of 15 mm.
The potential difference between the plates is 660 V.

What is the weight of the particle?

Select one of the following:

A 2.1 × 10^−14 N
B 2.1 × 10^−15 N
C 2.1 × 10^−17 N
D 1.1 × 10^−23 N

Explanation

Question 5 of 10

1

Three cells with e.m.f.s V1, V2 and V3, have negligible internal resistance.
These cells are connected to three resistors with resistances R1, R2 and R3, as shown.
The current in the circuit is I.

Which equation is correct?

Select one of the following:

A
B
C
D

Explanation

Question 6 of 10

1

Three resistors, each of resistance R, are connected in a network, as shown.
The total resistance between points X and Y is 8.0 Ω.

What is the value of R ?

Select one of the following:

A 2.7 Ω
B 4.0 Ω
C 5.3 Ω
D 12 Ω

Explanation

Question 7 of 10

1

The battery of a car has an internal resistance of 0.10 Ω and an electromotive
force of 12 V. When the battery is connected to the starter motor, the potential difference across the battery terminals is 7.0 V.

What is the current supplied to the starter motor?

Select one of the following:

A 50 A
B 70 A
C 120 A
D 190 A

Explanation

Question 8 of 10

1

A wire RST is connected to another wire XY as shown.
Each wire is 100 cm long with a resistance per unit length of 10 Ω.m–1.

What is the total resistance between X and Y?

Select one of the following:

A 3.3 Ω
B 5.0 Ω
C 8.3 Ω
D 13.3 Ω

Explanation

Question 9 of 10

1

A pencil is used to draw a line of length 30 cm and width 1.2 mm. The resistivity of the material in the pencil is 2.0 × 10–5 Ω m and the resistance of the line is 40 kΩ.

What is the thickness of the line?

Select one of the following:

A 1.25 × 10^–10 m
B 1.25 × 10^–8 m
C 1.25 × 10^–7 m
D 1.25 × 10^–5 m

Explanation

Question 10 of 10

1

The diagram shows a low-voltage circuit for heating the water in a fish tank.
The heater has a resistance of 3.0 Ω. The voltage source has an e.m.f. of 12 V and an internal resistance of 1.0 Ω.

At what rate does the voltage source supply energy to the heater?

Select one of the following:

A 27 W
B 36 W
C 48 W
D 64 W

	Created by Jeffrey Piggott over 5 years ago

Quiz for AS Level Physics Unit 19 Current of Electricity - Electrical Quantities

9702 Current Potential Difference & Power Quiz

Question 1 of 10

The diagram shows the symbol for a wire carrying a current I. What does this current represent?

Select one of the following:

Explanation

Question 2 of 10

Which amount of charge, flowing in the given time, will produce the largest current?

Select one of the following:

Explanation

Question 3 of 10

A 12 V battery is charged for 20 minutes by connecting it to a source of electromotive force (e.m.f.). The battery is supplied with 7.2 × 104 J of energy in this time. How much charge flows into the battery?

Select one of the following:

Explanation

Question 4 of 10

A particle has a charge of 4.8 × 10–19 C. The particle remains at rest between a pair of horizontal, parallel plates having a separation of 15 mm. The potential difference between the plates is 660 V. What is the weight of the particle?

Select one of the following:

Explanation

Question 5 of 10

Three cells with e.m.f.s V1, V2 and V3, have negligible internal resistance. These cells are connected to three resistors with resistances R1, R2 and R3, as shown. The current in the circuit is I. Which equation is correct?

Select one of the following:

Explanation

Question 6 of 10

Three resistors, each of resistance R, are connected in a network, as shown. The total resistance between points X and Y is 8.0 Ω. What is the value of R ?

Select one of the following:

Explanation

Question 7 of 10

The battery of a car has an internal resistance of 0.10 Ω and an electromotive force of 12 V. When the battery is connected to the starter motor, the potential difference across the battery terminals is 7.0 V. What is the current supplied to the starter motor?

Select one of the following:

Explanation

Question 8 of 10

A wire RST is connected to another wire XY as shown. Each wire is 100 cm long with a resistance per unit length of 10 Ω.m–1. What is the total resistance between X and Y?

Select one of the following:

Explanation

Question 9 of 10

A pencil is used to draw a line of length 30 cm and width 1.2 mm. The resistivity of the material in the pencil is 2.0 × 10–5 Ω m and the resistance of the line is 40 kΩ. What is the thickness of the line?

Select one of the following:

Explanation

Question 10 of 10

The diagram shows a low-voltage circuit for heating the water in a fish tank. The heater has a resistance of 3.0 Ω. The voltage source has an e.m.f. of 12 V and an internal resistance of 1.0 Ω. At what rate does the voltage source supply energy to the heater?

Select one of the following:

Explanation

The diagram shows the symbol for a wire carrying a current I.

What does this current represent?

A 12 V battery is charged for 20 minutes by connecting it to a source of electromotive force (e.m.f.).
The battery is supplied with 7.2 × 104 J of energy in this time.

How much charge flows into the battery?

A particle has a charge of 4.8 × 10–19 C.
The particle remains at rest between a pair of horizontal, parallel plates having a separation of 15 mm.
The potential difference between the plates is 660 V.

What is the weight of the particle?

Three cells with e.m.f.s V1, V2 and V3, have negligible internal resistance.
These cells are connected to three resistors with resistances R1, R2 and R3, as shown.
The current in the circuit is I.

Which equation is correct?

Three resistors, each of resistance R, are connected in a network, as shown.
The total resistance between points X and Y is 8.0 Ω.

What is the value of R ?

The battery of a car has an internal resistance of 0.10 Ω and an electromotive
force of 12 V. When the battery is connected to the starter motor, the potential difference across the battery terminals is 7.0 V.

What is the current supplied to the starter motor?

A wire RST is connected to another wire XY as shown.
Each wire is 100 cm long with a resistance per unit length of 10 Ω.m–1.

What is the total resistance between X and Y?

A pencil is used to draw a line of length 30 cm and width 1.2 mm. The resistivity of the material in the pencil is 2.0 × 10–5 Ω m and the resistance of the line is 40 kΩ.

What is the thickness of the line?

The diagram shows a low-voltage circuit for heating the water in a fish tank.
The heater has a resistance of 3.0 Ω. The voltage source has an e.m.f. of 12 V and an internal resistance of 1.0 Ω.

At what rate does the voltage source supply energy to the heater?