Free Printable Quiz 2 - Current, Potential Difference & Ohm's law

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Quiz 2 - Current, Potential Difference & Ohm's law

Total questions: 30

Worksheet time: 28mins

Name

Class

Date

Why is a battery important in an electrical circuit?

As a source of energy.

As a path for electricity to flow through.

As a connector to connect all parts of a circuit.

Batteries and power plants are examples of ______________.

energy sources

energy conduction

energy transformation

An object through which electrons can easily flow is called ___________.

Conductor

Insulator

What is the difference between a conductor and an insulator?

An insulator allows electricity to flow through it easily and a conductor does not

A conductor allows electricity to flow through it easily and an insulator does not.

An insulator is magnetic and a conductor is not

A conductor is magnetic and an insulator is not

Why metal or conductor is a good electrical conductivity?

Because the material has a large number of electrons that able to move freely

Because the material has a high electrical resistivity

Because the electrons in the material are not free to roam around and be shared by neighboring atoms

Because the current can flow at low temperatures

The rate of flow of electrical charges is known as _________.

Current

Resistance

Voltage

Conductor

Which of the following equations is the correct one to describe current?

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

$I=\frac{Q}{e}$

$I=\frac{F}{q}$

$I=\frac{Q}{t}$

One ampere equals about 1 _____ of electrons

voltage

watt

ohm

coulomb

30 C of charge flows through a wire in 1.2 seconds. What is the current?

1.5 A

15 A

2.5 A

25 A

10.

An electric charge of 900 C flows through a metallic conductor in 10 minutes. Calculate the current.

1.5 A

15 A

9.0 A

90 A

11.

The electric current in a circuit is 2.0 A. The charge that flows in the circuit in a 5.0 s duration is

0.40 C

2.0 C

2.5 C

10 C

12.

If a current of 0.8 A flows in a wire, how many electrons pass through the wire in one minute?

1e=1.6\times10^{-19}\ C

$3\times10^{18}\ electrons$

$3\times10^{20\ }electrons$

$3\times10^{24}\ electrons$

$3\times10^{26}\ electrons$

13.

The electrons move from the __________ terminal to the __________ terminal of a battery.

positive, negative

negative, positive

positive, positive

negative, negative

14.

Below are a few analogy to describe electric potential difference except...

Waterfall

Falling of a coconut from tree

Hot air balloons

Water tower

15.

The difference in electrical potential energy between two places is called

resistance

friction

induction

voltage

16.

What is voltage?

The amount of electric potential energy per one coulomb of charge

The amount of 1 coulomb of charge per unit of potential energy

The number of volts per coulomb

The amount of electric potential energy per volt

17.

Voltage is measured in __.

Volts

Watts

Coulombs

Amps

18.

What is the correct equation?

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

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

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

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

19.

What is 1 volt equivalent to?

1J/C

1C/J

1A/s

1J/V

20.

work done = energy transferred

true

false

21.

When the switch is off, the ______ terminal, P is at a ______ potential and the ______ terminal Q is at a ______ potential.

positive, higher, negative, lower

negative, lower, positive, higher

positive, lower, negative, higher

negative, higher, positive, higher

22.

If the switch is on, the bulb is light up. The energy carried by the charges will be converted into other forms of energy such as light and heat energy in the bulb. Which of physics principle is best describe for this situation?

Superposition

Conservation of Charge

Conservation of Momentum

Conservation of Energy

23.

What is the energy given off by a 20 V bulb which has 10 C passing through it?

200J

0.5J

250J

24.

When lighting happen during thunderstorm, 25 C charge is transferred from could to the ground and 1.25 x 10¹⁰ J energy is produced. Calculate the potential difference within cloud and the ground in unit Volt.

4.00 x 10⁸

2.00 x 10⁸

3.00 x 10⁸

5.00 x 10⁸

25.

A kettle heater supplies 600 J of heat in 40 s. If the heater is connected to a 12 V battery, the current flowing through the heater is

480 A

180 A

50 A

1.25 A

26.

Consider the pipe in the diagram above. The rate of flow of the water in the house is greater when the height of pipe is higher. The water flow is analogous to__________.

voltage

resistance

current

pressure

27.

In the electric circuit, the ______ the potential difference or voltage, the ______ the current flow.

greater, greater

lower, greater

lower, lower

28.

A bird standing which put both of its leg on electric transmission cable does not get electrocuted due to

Low current

High current

Low potential difference

High electric charge

29.

Ohm's law states that

current passes through an non-ohmic conductor is directly proportional to the potential difference across it if temperature and other physical conditions are fixed.

current passes through an ohmic conductor is inversely proportional to the potential difference across it if temperature and other physical conditions are constant.

current passes through an ohmic conductor is directly proportional to the potential difference across it if temperature and other physical conditions are fixed.

30.

Below are the ohmic conductor materials except...

nichrome

copper

aluminium

germanium

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Quiz 2 - Current, Potential Difference & Ohm's law

Total questions: 30

Worksheet time: 28mins

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