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Unit 16: Current Electricity

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1

An ammeter is connected in a circuit in:

2

To convert a galvanometer into a voltmeter, we connect:

3

Which instrument is used to measure potential difference?

4

The SI unit of electric current is:

5

Which particles are responsible for electric current in metallic conductors?

6

The opposition offered by a conductor to the flow of current is called:

7

Ohm’s Law states that current through a conductor is directly proportional to:

8

A voltmeter is connected in a circuit in:

9

Electric current is defined as the rate of flow of:

10

One volt is equal to:

11

EMF of a cell is measured when the circuit is:

12

Which of the following is a source of DC?

13

The SI unit of resistivity is:

14

Which instrument is most sensitive for detecting small currents?

15

One ampere of current means the flow of charge equal to:

16

In the formula R = ρL/A, the symbol ρ represents:

17

Which quantity remains constant in an ohmic conductor at constant temperature?

18

Potential difference is the work done per unit:

19

A material having very high resistivity is called:

20

Electromotive force (EMF) of a source is the energy supplied per unit:

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