# Revision On Electricity (SEC 2)

17 Questions | Total Attempts: 1065  Settings  .

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• 1.
The S.I unit of charge is coulomb, C.
• A.

True

• B.

False

• 2.
___________ is the rate of flow of charge.
• 3.
The S.I unit for potential difference is _______
• 4.
Three identical bulbs are connected in series. If the current passing through the first bulb is 3 A, then the current passing through the second bulb is 2 A and the current passing through the last bulb is 1A.
• A.

True

• B.

False

• 5.
Three bulbs are connected in series. If the potential difference across each bulb is the same, then the resistance of each bulb must also be the same.
• A.

True

• B.

False

• 6.
Three bulbs are connected in parallel. The potential difference across each bulb will be the same. Even if the bulbs have different resistance.
• A.

True

• B.

False

• 7.
Three bulbs are connected in parallel, if the currect through each bulb is the same, then the resistance of the bulbs must be the same too.
• A.

True

• B.

False

• 8.
Three identical bulbs are connected in parallel, if the effective resistance of the circuit is 3 ohms, what is the resistance of each bulb?
• A.

0.3 ohms

• B.

1 ohms

• C.

3 ohms

• D.

9 ohms

• 9.
An ammeter has _________ resistance.
• 10.
A voltmeter has _________ resistance.
• 11.
The resistance of an ohmic metal wire does not depend on
• A.

Its length.

• B.

Its material.

• C.

Its cross-sectional area.

• D.

The potential difference supplied across it.

• 12.
Which of the following statements about electrical power is true?
• A.

Power is the rate at which energy is changed from one form to another.

• B.

The S.I unit of power is Joules.

• C.

Power = Voltage X Current

• D.

Energy X Time = Power

• 13.
The earth wire is at zero potential.
• A.

True

• B.

False

• 14.
The fuse should be connected to the _____ wire.
• 15.
The correct colour of the Live wire is
• A.

Brown

• B.

Green

• C.

Blue

• 16.
The correct colour of the Earth wire is
• A.

Brown

• B.

Yellow and green

• C.

Blue

• 17.
Which of the following statements is incorrect?
• A.

The switch of an appliance can be installed at the live wire or the neutral wire.

• B.

Appliances without Earth wire can still function.

• C.

Earth wire connects the body of an appliance to Earth so that the appliance will not become live.

• D.

The potential at the neutral wire is always zero.