D.C. circuits multiple choice questions

D.C. Circuits

Total marks:0 / 16

1 of 16

The National Grid uses high-voltage transmission lines to carry electrical power around the UK. A particular transmission line delivers 800 MW of power at 132 kV to the user. It loses 1% of the transmitted power as heat.

What is the resistance of the transmission line?

0 / 1

2 of 16

In this resistor network, the emf of the supply is 12 V and it has negligible internal resistance.

Diagram of a resistor network with a 12 V power supply showing resistors of 2 ohms, 3 ohms, and 1 ohm, and points X and Y.

What is the reading on a voltmeter connected between points X and Y?

0 / 1

3 of 16

Resistors of resistance R, R and 3R are connected as shown.

Diagram showing resistors of resistance R, R, and 3R connected in parallel.

What is the resistance of the arrangement?

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4 of 16

Which row shows the resistances of an ideal ammeter and an ideal voltmeter?

Table showing the resistances of an ideal ammeter and an ideal voltmeter with options A to D.

0 / 1

5 of 16

A resistor with resistance R is made from metal wire of resistivity $ρ$ .

The length of the wire is L.

What is the diameter of the wire?

0 / 1

6 of 16

Resistors X and Y are connected in series with a 6.0 V battery of negligible internal resistance.

X has resistance R and Y has resistance $\frac{R}{2}$ .

A voltmeter of resistance R is connected across Y.

Diagram of a series circuit with resistors X and Y connected to a 6.0 V battery and a voltmeter across resistor Y.

What is the reading on the voltmeter?

0 / 1

7 of 16

In the circuit shown, a potential difference of 3.0 V is applied across XY.

Circuit diagram showing a potential difference of 3.0 V applied across XY with resistors of 6 ohms, 2 ohms, 5 ohms, and 3 ohms.

What is the current in the 5 Ω resistor?

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8 of 16

Which is equivalent to the ohm?

0 / 1

9 of 16

A wire has a resistance R.

What is the resistance when both the length and radius of the wire are doubled?

0 / 1

10 of 16

Three resistors are connected in a circuit.

Circuit diagram showing three resistors with resistances of 20 ohms, 10 ohms, and 10 ohms.

The resistance of each resistor is shown in the circuit diagram.

What is the total resistance of this circuit?

0 / 1

11 of 16

Diagram showing conventional currents I1, I2, I3, and I4 entering and leaving a junction in an electric circuit.

The diagram shows the conventional currents entering and leaving a junction in an electric circuit.

I₁ , I₂ , I₃ and I₄ are all positive.

Which statement is always true?

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12 of 16

The potential difference across a lamp is 2.5 V. The current in the lamp is 20 mA.

What is the energy dissipated in the lamp in 3.0 hours?

0 / 1

13 of 16

The current in a wire is 20 mA.

How many electrons pass a point in the wire in 2 minutes?

0 / 1

14 of 16

The diagram shows the currents in a set of wires.

Diagram showing the currents in a set of wires with various amperes including 2A, 4A, 3A, and 1A.

What is the magnitude of the current at X?

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15 of 16

A gas containing doubly-charged ions flows to give an electric current of 0.64 A

How many ions pass a point in 1.0 minute?

0 / 1

16 of 16

A mobile phone operates at a constant power of 200 mW

It has a 3.7 V lithium-ion battery that has a charge capacity of 9,400 C

What is the time taken for the battery to discharge completely?

0 / 1

D.C. Circuits

Total marks:0 / 16

1 of 16

What is the resistance of the transmission line?

0 / 1

2 of 16

In this resistor network, the emf of the supply is 12 V and it has negligible internal resistance.

What is the reading on a voltmeter connected between points X and Y?

0 / 1

3 of 16

Resistors of resistance R, R and 3R are connected as shown.

What is the resistance of the arrangement?

0 / 1

4 of 16

Which row shows the resistances of an ideal ammeter and an ideal voltmeter?

0 / 1

5 of 16

A resistor with resistance R is made from metal wire of resistivity $ρ$ .

The length of the wire is L.

What is the diameter of the wire?

0 / 1

6 of 16

Resistors X and Y are connected in series with a 6.0 V battery of negligible internal resistance.

X has resistance R and Y has resistance $\frac{R}{2}$ .

A voltmeter of resistance R is connected across Y.

What is the reading on the voltmeter?

0 / 1

7 of 16

In the circuit shown, a potential difference of 3.0 V is applied across XY.

What is the current in the 5 Ω resistor?

0 / 1

8 of 16

Which is equivalent to the ohm?

0 / 1

9 of 16

A wire has a resistance R.

What is the resistance when both the length and radius of the wire are doubled?

0 / 1

10 of 16

Three resistors are connected in a circuit.

The resistance of each resistor is shown in the circuit diagram.

What is the total resistance of this circuit?

0 / 1

11 of 16

The diagram shows the conventional currents entering and leaving a junction in an electric circuit.

I₁ , I₂ , I₃ and I₄ are all positive.

Which statement is always true?

0 / 1

12 of 16

The potential difference across a lamp is 2.5 V. The current in the lamp is 20 mA.

What is the energy dissipated in the lamp in 3.0 hours?

0 / 1

13 of 16

The current in a wire is 20 mA.

How many electrons pass a point in the wire in 2 minutes?

0 / 1

14 of 16

The diagram shows the currents in a set of wires.

What is the magnitude of the current at X?

0 / 1

15 of 16

A gas containing doubly-charged ions flows to give an electric current of 0.64 A

How many ions pass a point in 1.0 minute?

0 / 1

16 of 16

A mobile phone operates at a constant power of 200 mW

It has a 3.7 V lithium-ion battery that has a charge capacity of 9,400 C

What is the time taken for the battery to discharge completely?

0 / 1

D.C. Circuits - exam practice

D.C. Circuits

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Question 16 of 16

D.C. Circuits - exam practice

D.C. Circuits

Question 1 of 16

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Question 3 of 16

Question 4 of 16

Question 5 of 16

Question 6 of 16

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Question 8 of 16

Question 9 of 16

Question 10 of 16

Question 11 of 16

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