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Electrical Circuits Foundation Quiz

Total questions: 46

Worksheet time: 29mins

Name
Class
Date
1.

What is the total resistance in a series circuit with three resistors of 2 Ω, 3 Ω, and 5 Ω?

a)

10 Ω

b)

5 Ω

c)

3 Ω

d)

2 Ω

2.

According to Ohm's Law, what is the formula to calculate voltage?

a)

V=I×RV = I \times R

b)

V=IRV = \frac{I}{R}

c)

V=R−IV = R - I

d)

V=I+RV = I + R

3.

In a series circuit, if the current is 2 A and the total resistance is 5 Ω, what is the voltage across the circuit?

a)

10 V

b)

5 V

c)

2 V

d)

1 V

4.

What happens to the total current in a parallel circuit when more branches are added?

a)

It increases

b)

It decreases

c)

It remains the same

d)

It becomes zero

5.

Which of the following is NOT a component of an electrical circuit?

a)

Battery

b)

Switch

c)

Water pump

d)

Resistor

6.

What is the unit of electrical resistance?

a)

Ampere

b)

Volt

c)

Ohm

d)

Watt

7.

In a circuit diagram, what does a straight line with a break in the middle represent?

a)

A closed switch

b)

An open switch

c)

A resistor

d)

A battery

8.

If a circuit has a voltage of 12 V and a resistance of 4 Ω, what is the current flowing through the circuit?

a)

3 A

b)

4 A

c)

12 A

d)

48 A

9.

What is the main advantage of a parallel circuit over a series circuit?

a)

Easier to build

b)

Components can operate independently

c)

Uses less wire

d)

Lower total resistance

10.

What is the power consumed by a device with a current of 2 A and a voltage of 10 V?

a)

5 W

b)

10 W

c)

20 W

d)

40 W

11.

In a circuit diagram, what does a circle with a cross inside represent?

a)

A light bulb

b)

A battery

c)

A resistor

d)

A switch

12.

What happens to the voltage across each component in a parallel circuit?

a)

It is the same across all components

b)

It is divided equally among components

c)

It is zero

d)

It varies randomly

13.

What is the total voltage in a series circuit with two batteries of 6 V and 9 V?

a)

6 V

b)

9 V

c)

15 V

d)

3 V

14.

In a parallel circuit, if one branch has a current of 3 A and another branch has a current of 2 A, what is the total current in the circuit?

a)

1 A

b)

2 A

c)

3 A

d)

5 A

15.

Why is electrical wiring usually made from copper?

a)

Because copper is shiny

b)

Because copper conducts electricity

c)

Because copper is not magnetic

d)

Because copper insulate electricity

16.

A material that does NOT let electricity pass through it is called ...

a)

An electrical conductor

b)

An electrical insulator

c)

An electrical source

d)

An electric appliance

17.

What is a circuit that only has ONE path for electricity to flow?

a)

series circuit

b)

closed circuit

c)

parallel circuit

d)

light bulb

18.

What is a circuit with several paths for electricity to flow?

a)

conductor

b)

series circuit

c)

parallel circuit

d)

open circuit

19.
What will happen if one light bulb is removed from this circuit?
a)
The other bulbs will go out.
b)
The other bulbs will stay on
c)
The other bulbs will get dimmer.
d)
The battery will become stronger.
20.

Which of the following devices measures current in an electric circuit?

a)

an ammeter

b)

an ohmmeter

c)

a voltage meter

d)

a resistor

21.

In a closed circuit, how does battery voltage affect current?

a)

As voltage increases, current increases.

b)

As voltage increases, current decreases.

c)

Voltage has no affect on current.

d)

If voltage exceeds current, a short circuit circuit will develop.

22.

An electrical circuit is powered by a 1.5-volt battery and contains a light bulb producing 5 Ohms of resistance. There is also another 5 Ohm resistor in the circuit. How many amps of current are in this circuit? HINT: V = IR

a)

0.15 amps

b)

15.0 amps

c)

6.67 amps

d)

1.50 amps

23.

How should you put in an ammeter?

a)
In Parallel
b)
In Series
24.
A voltmeter should be placed ........... in a circuit
a)
in parallel
b)
in series
c)
in order
d)
upside down
25.
What would the voltmeter read
a)
1V
b)
2V
c)
3V
d)
6V
26.

What is this the symbol for?

a)

LED

b)

LDR

c)

Thermistor

d)

Variable Resistor

27.

Which is the correct symbol for a thermistor?

a)
b)
c)
d)
28.

What is the unit of charge?

a)

Amps

b)

Volts

c)

Coulombs

d)

Watts

29.

What device does this graph represent?

a)

Diode

b)

Fixed resistor

c)

Filament lamp

d)

Thermistor

30.

What device does this IV graph represent?

a)

Diode

b)

Fixed resistor

c)

Filament lamp

d)

Thermistor

31.

What device does this graph represent?

a)

Diode

b)

Fixed resistor

c)

Filament lamp

d)

Thermistor

32.

What device does this graph represent?

a)

Diode

b)

Fixed resistor

c)

Filament lamp

d)

Thermistor

33.

Which of the following has a resistance that decreases with temperature.

a)

Filament bulb

b)

thermistor

c)

Light dependent resistor

d)

Diode

34.

Which of the following has a resistance that decreases with light intensity.

a)

Filament bulb

b)

thermistor

c)

Light dependent resistor

d)

Diode

35.

What does this graph represent?

a)
A visual representation of data trends or relationships.
b)

Filament bulb

c)

Diode

d)

Resistor or wire

36.

What does this IV graph represent?

a)

The IV graph shows the resistor or a wire.

b)
The IV graph illustrates the power consumption of a device over time.
c)

The IV graph shows the resistance in a filament bulb.

d)

The IV graph represents the current-voltage relationship in a diode.

37.

What does this IV graph represent?

a)
The IV graph shows the temperature-resistance relationship in a material.
b)

The IV graph represents the current-voltage relationship in a filament.

c)

The IV graph represents the current-voltage relationship in a diode.

d)

The IV graph represents the current-voltage relationship in a resistor of wire.

38.

A toaster takes 200 s to transfer 180,000 J of energy. What is the power of the toaster?

a)

90 W

b)

900 W

c)

9,000 W

d)

90,000 W

39.

Energy (J) = Power (W) x Time (s)

Rearrange the equation to make "Power" the subject

a)
Power = Energy / Time
b)
Power = Energy x Time
c)
Power = Energy - Time
d)
Power = Energy + Time
40.

Energy (J) = Power (W) x Time (s)

Rearrange the equation to make "Time" the subject

a)
Time = Energy / Power
b)
Time = Energy - Power
c)
Time = Energy + Power
d)
Time = Power / Energy
41.

Energy (J) = Power (W) x Time (s)

If the energy is 300 J and the power is 50 W, rearrange the equation to find the time.

a)

12 s

b)

6 s

c)
10 s
d)
4 s
42.

If the power is 100 W and the time is 20 s, what is the energy?

a)
2000 J
b)
1500 J
c)
1000 J
d)
2500 J
43.

What is the formula to calculate current using Ohm's Law?

a)

I=VRI = \frac{V}{R}

b)

I=V×RI = V \times R

c)

I=R−VI = R - V

d)

I=V+RI = V + R

44.

In a parallel circuit, if the voltage is 12 V and the resistance is 4 Ω, what is the current through the circuit?

a)

3 A

b)

4 A

c)

6 A

d)

12 A

45.

What is the unit of electrical resistance?

a)

Ohm

b)

Volt

c)

Ampere

d)

Watt

46.

What is the effect on total resistance when resistors are added in series?

a)

It increases

b)

It decreases

c)

It remains the same

d)

It becomes zero

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