Free Printable Electrical Circuits

1.

The resistance of an IDEAL ammeter is assumed to be

a)

zero

b)

0.1Ω

c)

1 to 2Ω

d)

infinite

2.

Which of the following formulae (in which the symbols have their usual meanings) is a mathematical expression of Ohm's Law?

a)

V = IR

b)

P = VI

c)

Q = It

d)

E = Pt

3.

Which of the following statements for the parallel circuit in the diagram is/are true?

I. The potential difference across each of the resistors is the

same

II. The potential difference between X and Y is the same as

that across the 2Ω resistor

III. The current through each of the resistors is different.

a)

I only

b)

III only

c)

I and III only

d)

I, II and III

4.

Which of the following circuit symbols represents a fuse?

a)

b)

c)

d)

5.

Which of the following statements about insulators is/are true?

I. In an insulator all electrons are bound firmly to their atoms

II. In an insulator many electrons can move freely from atom to atom

III. An insulator cannot be charged by rubbing

IV. A good insulator retains the charge better than a conductor

a)

I only

b)

I and II only

c)

II and III only

d)

II and IV

6.

The current in a wire is one ampere if a charge of

a)

10C flows through it in 10s

b)

1C flows through it in 1s

c)

10C flows through it in 1s

d)

100C flows through it in 10s

7.

In the parallel circuit shown, ALL of the current, I, supplied by the battery

a)

goes through each of the resistors

b)

goes through the largest resistor only

c)

goes through the smallest resistor only

d)

equals the sum of the currents in the two resistors

8.

Which of the following relationships gives a correct value for the combined resistance $R_T$ of resistors $R_1$ , $R_2$ and $R_3$ connected in parallel?

a)

$R_T\ =\ R_1\ +R_2\ +\ R_3$

b)

R_T\ =\frac{R_1R_2R_3}{R_1+R_2+R_3}

c)

$R_T\ =\frac{1}{R_1}+\frac{1}{R_2}+\frac{1}{R_3}$

d)

$\frac{1}{R_T}\ =\frac{1}{R_1}+\frac{1}{R_2}+\frac{1}{R_3}$

9.

Which of the following relationships between electrical quantities is correct?

a)

V =PI

b)

R = VI

c)

$Q\ =\ \frac{E}{V}$

d)

E = VI

10.

Which of the following is NOT a measure of energy?

a)

Power x time

b)

Current x pd

c)

Pd x charge

d)

Force x distance

11.

In the circuit above, $A_1$ , $A_2$ , $A_3$ , $A_4$ and $A_5$ are identical ammeters, and three equal resistors are denoted by R. Which of the following statements would be correct?

I. The readings of

A_1

and

A_5

will be the same
II. The readings of

A_1

and

A_2

will be the same
III. The readings of

A_3

and

A_4

will be the same

a)

III only

b)

I and II only

c)

II and III only

d)

I, II and III

12.

Which of the following circuits are electrically the same as the circuit above?

a)

b)

c)

d)

13.

In which of the following diagrams are resistors P and Q in series with each other and parallel with R?

a)

b)

c)

d)

14.

A student requires a circuit to measure the resistance of a resistor. Which of the circuits below is correctly connected?

a)

b)

c)

d)

15.

When electrons flow out of the negative side of the battery, through the circuit, and back to the positive side of the battery, this is known as

a)

Conventional Current

b)

Ohm's Law

c)

Electron Flow

d)

Kirchhoff's Law

16.

When current flows out of the positive side of the battery, through the circuit, and back to the negative side of the battery, this is known as...

a)

Conventional Current

b)

Ohms Law

c)

Electron Flow

d)

Kirchoff's Law

17.

The resistance of an IDEAL voltmeter is assumed to be

a)

zero

b)

0.1Ω

c)

1 to 2Ω

d)

infinite

18.

For a SERIES circuit, which of the following represents the relationship amongst all the current values in the circuit?

a)

$\frac{1}{I}\ =\ \frac{1}{I_1}=\frac{1}{I_2}=\frac{1}{I_3}$

b)

$I\ =\ I_1+I_2+I_3$

c)

$I\ =\ I_1=I_2=I_3$

d)

$\frac{1}{I}\ =\ \frac{1}{I_1}+\frac{1}{I_2}+\frac{1}{I_3}$

19.

For a PARALLEL circuit, which of the following represents the relationship amongst all the current values in the circuit?

a)

$\frac{1}{I}\ =\ \frac{1}{I_1}=\frac{1}{I_2}=\frac{1}{I_3}$

b)

$I\ =\ I_1+I_2+I_3$

c)

$I\ =\ I_1=I_2=I_3$

d)

$\frac{1}{I}\ =\ \frac{1}{I_1}+\frac{1}{I_2}+\frac{1}{I_3}$

20.

For a PARALLEL circuit, which of the following represents the relationship amongst all the current values in the circuit?

a)

$\frac{1}{V}\ =\ \frac{1}{V_1}=\frac{1}{V_2}=\frac{1}{V_3}$

b)

$V\ =\ V_1+V_2+V_3$

c)

$V\ =\ V_1=V_2=V_3$

d)

$\frac{1}{V}\ =\ \frac{1}{V_1}+\frac{1}{V_2}+\frac{1}{V_3}$

21.

For a SERIES circuit, which of the following represents the relationship amongst all the current values in the circuit?

a)

$\frac{1}{V}\ =\ \frac{1}{V_1}=\frac{1}{V_2}=\frac{1}{V_3}$

b)

$V\ =\ V_1+V_2+V_3$

c)

$V\ =\ V_1=V_2=V_3$

d)

$\frac{1}{V}\ =\ \frac{1}{V_1}+\frac{1}{V_2}+\frac{1}{V_3}$

22.

ALL of the following are equations to calulate Power EXCEPT

a)

$P\ =\ \frac{W}{t}$

b)

$P\ =IV$

c)

$P\ =\ \frac{I^2}{R}$

d)

$P\ =\ I^2R$

23.

Which quantity/unit pair is incorrect?

a)

Q/A

b)

V/V

c)

P/W

d)

R/ $\Omega$

24.

A microwave oven consumes 1100 W when operated on high power. What is the MINIMUM current rating for a fuse to be used to protect the oven if the mains potential difference is 110 V?

a)

9A

b)

10A

c)

11A

d)

It is unknown

25.

This symbol represents

a)

An AC Supply

b)

A fuse

c)

A resistor

d)

A transformer

Electrical Circuits

Total questions: 25

Worksheet time: 15mins

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