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

Two devices are connected between two points say A and B in parallel. The physical quantity that will remain the same between the two points is

current

voltage

resistance

None of these

3 / 15

The least resistance obtained by using 2 Ω, 4 Ω, 1 Ω and 100 Ω is:

< 100 Ω

< 4 Ω

< 1 Ω (d) > 2 Ω

NOT AVAILABLE

4 / 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

5 / 15

A cooler of 1500 W, 200 volt and a fan of 500 W, 200 volt are to be used from a household supply. The rating of fuse to be used is:

2.5 A

5.0 A

7.5 A

10:00 AM

6 / 15

A student drives out an experiment and plots the V-I graph of three samples of nichrome wire with resistances R1 R2 and R3 respectively. Which of the following is huge?

R1 = R2 = R3

R1 > R2 > R3

R3 > R2 > R1

R2 > R3 > R1

7 / 15

Electrical resistivity of a given metallic wire depends upon:

Its length

Its thickness

Its shape

Nature of the material

8 / 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

9 / 15

The electrical resistance of a conductor having cross-sectional area 1 m² and length 1m

electrical inductivity

electrical resistivity

none

10 / 15

The commercial unit of electrical energy

kilo hour

watt hour

kilowatt hour

none

11 / 15

The ammeter is always connected in series because

to measure the current fowing through a circuit.

to measure the voltage fowing through a circuit.

to measure the potential difference fowing through a circuit.

to measure the resistance fowing through a circuit.

12 / 15

Joule’s law of heating implies that heat produced in a resistor is directly proportional to the square of

Resistance

Current

power

voltage

13 / 15

The unit of electric power may also be expressed as

volt-ampere

kilowatt-hour

watt-second

joule second

14 / 15

The instrument used for measuring electric current is

Ammeter

voltmeter

galvanometer

potentiometer

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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