#### Electricity English Medium Free Online Test 1 Mark Questions with Answer Key 2020 - 2021

10th Standard

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Science

Time : 00:15:00 Hrs
Total Marks : 15

Part A

15 x 1 = 15
1. SI unit of resistance is

(a)

mho

(b)

joule

(c)

ohm

(d)

ohm meter

2. Kilowatt hour is the unit of

(a)

resistivity

(b)

conductivity

(c)

electrical energy

(d)

electrical power

3. When will be the current flow in a circuit?

(a)

A switch is closed

(b)

A switch is opened

(c)

Switch is either open or closed

(d)

None of the above

4. A parallel circuit consist of three resistors with values of 430, 210 and 100. The total resistance is

(a)

0.017 ohm

(b)

58.82 ohm

(c)

58.82 kilo ohm

(d)

None of the above

5. The resistance of material depends on.

(a)

Temperature

(b)

Length of conductor

(c)

Area of cross-section

(d)

All the above

6. Give the name of components which is designed to oppose the flow of current.

(a)

Capacitor

(b)

Resistors

(c)

Fuse wire

(d)

Inductor

7. Kilowatt - hour is the unit of

(a)

Power

(b)

Potential difference

(c)

Force

(d)

Electrical energy

8. Why battery is used in the circuit?

(a)

Measure Current

(b)

Maintain a potential difference

(c)

Oppose the current

(d)

Measure potential

9. If two unequal resistors connected in parallel then.

(a)

The voltage is same in both resistor

(b)

The current is same in both resistor

(c)

The voltage is larger in one of the resistor

(d)

The current is large in one of the resistor

10. In parallel combination, resistance decrease due to increase in

(a)

Area of cross section

(b)

Voltage

(c)

Length

(d)

Current

11. Why are copper wires used as connecting wires?

(a)

Low resistivity

(b)

Low conductivit

(c)

High Resistivity

(d)

Both A and B

12. Which of following relation is correct for voltage, work done and charge?

(a)

V = W x Q

(b)

W = V x Q

(c)

V = Q 1W

(d)

W = V / Q

13. Electric iron box and electric heater works on the principle of

(a)

heating effect of current

(b)

heating effect of voltage

(c)

heating effect of power

(d)

heating effect of emf

14. A 110 W, 220 V bulb draws a current.

(a)

2 A

(b)

440 A

(c)

0.5 A

(d)

5.5 A

15. The electric current in a closed circuit always flows from the ________ terminal of the electric cell to ___________ terminal.

(a)

-ve to +ve

(b)

+ve to -ve

(c)

+ve to +ve

(d)

none