Science : Ch 12 – Electricity

This test is designed based on NCERT Syllabus for Class 10 Topics : Electricity

Each time random 15 questions will be displaced
So retake the quiz till you have mastered all the questions

1 / 15

Electrical resistivity of a given metallic wire depends upon:

Its length

Its thickness

Its shape

Nature of the material Explanation:

2 / 15

A battery of 10 volt carries 20,000 C of charge through a resistance of 20 Ω. The work done in 10 seconds is:

2 × 10³ joule

2 × 10⁵joule

2 × 10⁴ joule

2 × 10² joule

3 / 15

The resistance of hot filament of the bulb is about 10 times the cold resistance. What will be the resistance of 100 W-220 V lamp, when not in use?

48 Ω

400 Ω

484 Ω

48.4 Ω

4 / 15

A current of 1 A is drawn by a filament of an electric bulb. Number of electrons passing through a cross-section of the filament in 16 seconds would be roughly

10 to the power of 20

10 to the power of 16

10 to the power of 18

10 to the power of 23

5 / 15

The resistivity does not change if:

the material is changed

the temperature is changed

the shape of the resistor is changed

both material and temperature are changed

6 / 15

Insulators consists of:

No resistance

High resistance

Small resistance

Variable resistance

7 / 15

True test of charge is

Attraction only

Repulsion only

Both attraction and repulsion

None of the above

8 / 15

Electrical resistivity of a given metallic wire depends upon:

Its length

Its thickness

Its shape

Nature of the material

9 / 15

The formula which states the relation between potential diference, current and resistance

V = I R

I=VR

R=VI

all of these

10 / 15

What is the maximum resistance which can be made using five resistors each of 1/5 W?

10 Ohm

1 Ohm

100 Ohm

1/5 Ohm

11 / 15

The commercial unit of electrical energy

kilo hour

watt hour

kilowatt hour

none

12 / 15

S.I unit of resistivity

ohm

mho

ohm metre

none

13 / 15

When a 4 V battery is connected across an unknown resistor there is a current of 100 mA in the circuit. The value of the resistance of the resister is

4 Ohm

40 Ohm

400 Ohm

0.4 Ohm

14 / 15

The maximum resistance which can be made using four resistors each of 2 Ohm

6 ohm

8 Ohm

2 ohm

10 ohm

15 / 15

The device used for detecting and indicating an electric current.

Ammeter

voltmeter

galvanometer

potentiometer

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Science : Ch 12 – Electricity

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