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

The values of mA and µA are:

10^-6 and 10^-9 A respectively

10^-3 and 10^-6 A respectively

10^-3 and 10^-9 A respectively

10^-6 and 10^-3 A respectively

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

A boy records that 4000 joule of work is required to transfer 10 coulomb of charge between two points of a resistor of 50 Ω. The current passing through it is:

2 A

4 A

8 A

16 A

4 / 15

A fuse wire frequently gets burnt when used with a good heater. It is advised to use a fuse wire of

more length

less radius

less length

more radius

5 / 15

A cell, a resistor, a key, and an ammeter are arranged as shown in the circuit diagrams. The current recorded in the ammeter will be:

maximum in (i)

maximum in (ii)

maximum in (iii)

same in all the cases

6 / 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

7 / 15

The commercial unit of electric energy is

horse power

joule/hour

kilowatt hour

mega-watt hour

8 / 15

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

V = I R

I=VR

R=VI

all of these

9 / 15

The property of a conductor to oppose the flow of charges through it.

Resistance

Reluctance

Conductance

inductance

10 / 15

S.I unit of resistance

ohm

mho

ohm metre

none

11 / 15

The rate at which electrical work is done or the rate at which electrical energy is consumed

Electrical power

electrical inductivity

electrical resistivity

none

12 / 15

At the time of short circuit, the electric current in the circuit

vary continuously

does not change

reduces substantially

increases heavily

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

An ideal ammeter is one which has

infinite resistance

zero resistance

finite resistance

no resistance

15 / 15

The device used to measure the internal resistance of a cell, to compare the e.m.f. of two cells and potential diference across a resistor

Ammeter

voltmeter

galvanometer

potentiometer

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Science : Ch 12 – Electricity

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