Elements of an Electric Circuit

Q. An arc lamp operates at 80v 10a. Suggest a method to use it with 240v DC source. Calculate the value of the electric component required for this purpose

Q.

The resistance of a discharge tube is

1. Non-ohmic

2. Ohmic

3. Zero

4. Both B and C

Q. Name the devices used to measure the following parameters of electricity.

1. kWh Meter
2. Ammeter
3. Voltmeter
4. Electroscope

Q.

Which of the following represents the units of current and potential difference respectively?

1. Volt, Ampere

2. Ampere, Volt

3. Volt, Joule

4. Ampere, Coulomb

Q. A bulb draws a current of 0.20 A for 15 minutes. What is the amount of electric charge that flows through it?

1. 200 C
2. 300 C
3. 182 C
4. 180 C

Q.

If a toy fan is connected across a battery for 2 minutes and we know that a charge transfer of 120 C takes place then find out the current in the circuit for that period of time.

1. 60 A

2. 120 A

3. 240 A

4. 1 A

Q.

When a tube-light rated 220V, 60W is connected across a potential of 220V for 22 sec then find the charge flowing in it.

1. 6 C

2. 22 C

3. 4 C

4. 220 C

Q.

Find the electric current that flows through a conductor if a charge of $4.2C$ flows through it in $2.1seconds$.

1. 0.5 Ampere

2. 2 Ampere

3. 0.25 Ampere

4. 0.01 Ampere

Q.

If ${10}^{20}$ charges flow from the black body to the red body through the copper wire in 8 seconds, then find the current flowing between them.

1. 2 A

2. 0.2 A

3. 8 A

4. 1 A

Q.

0.2 kΩ = ___Ω

1. 20

2. 2000

3. 0.002

4. 200

Q. A geyser is rated 1.5 kW at 220 V. What should be the rating of the fuse to be used?

1. 4 A
2. 5 A
3. 6 A
4. 7 A