CBSE Class X – Science Physics Exam (Full Syllabus)

This test is designed based on NCERT Syllabus for Class 10 Topics of Science – Physics

Each time random 25 questions will be displaced from the question bank of 500 + Questions
So we recommend you to retake the quiz till you have mastered all the questions

1 / 25

Inside the magnet, the field lines move from :

from south to north

from north to south

away from north pole

away from south poles

2 / 25

An electron moves with a speed v along positive direction of the x-axis. If a magnetic feld B acts along the positive y-direction, then the force on the electron will act along:

x-axis

y-axis

–ve z-direction

+ve z-direction

3 / 25

The magnetic feld inside a long straight solenoid carrying current is:

uneven

zero

same at all points

None of these

4 / 25

The strength of each of magnet reduces to half when it cut along its length into the equal parts magnetic field strength of a solenoid. Polarity of solenoid can be determined by:

use of compass needle

Right hand thumb rule

fleming left hand rule

either (a) or (b)

5 / 25

The instrument that use to direct electric current in the circuit is known as:

Electric motor

A.C generator

Galvanometer

None of the above

6 / 25

Overloading is caused to:

Insulation of wire is damaged

fault in the appliances

accidental hike in supply voltage

All of the above

7 / 25

Example of permanent magnet is

solenoid wounded across a nail and connected to a battery

Bar Magnet

Both 1 & 2

none

8 / 25

You are holding the current-carrying wire in your right hand so that your thumb points in the direction of current, then the direction in which your fingers encircle the wire will give the direction of the magnetic feld lines around the wire.explain

Maxwell’s left hand thumb rule

Maxwell’s right hand thumb rule

fleming right hand rule

fleming left hand rule

9 / 25

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

vary continuously

does not change

reduces substantially

increases heavily

10 / 25

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

11 / 25

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

12 / 25

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

13 / 25

One horsepower (hp) is parallel to

720 watt

746 watt

650 watt

310 watt

14 / 25

The commercial unit of electrical energy

kilo hour

watt hour

kilowatt hour

none

15 / 25

S.I unit of resistivity

ohm

mho

ohm metre

none

16 / 25

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

17 / 25

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

18 / 25

Which of the following phenomena contributes signifcantly to the reddish appearance of the sun at sunrise or sunset?

Dispersion of light

Scattering of light

Total internal refection of light

Refection of light from Earth

19 / 25

The sun appears red at sunset or sunrise. Choose the incorrect statement from the following

Light from the sun near the horizon passes through the layers of air.

Light from the sun near the horizon travels larger distance in the earth’s atmosphere before reaching our eyes. (c)

Most of the blue light and longer wavelengths are scattered away by the particles.

Most of the blue light and shorter wavelengths are scattered away by the

20 / 25

Power of a lens is the measure of the degree of

divergence of light ray

convergence of light ray

convergence or divergence of light ray.

none

21 / 25

Power of a lens is

1/f

1/T

1/fT

none

22 / 25

Light which consists of only one colour or single wavelength is called Monochromatic

Single chromatic

Dichromatic

Monochromatic

none

23 / 25

Why is red used as the stopping light at traffic signals?

Because of shorter wavelength

Because of longer wavelength

Because of no wavelength

none

24 / 25

The sky appears black to an astronaut

Because there is no refraction

Because there is no reflection

Because there is no scattering light

none

25 / 25

The refractive index of glass is largest for

violet color

red color

blue color

white color

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CBSE Class X – Science Physics Exam (Full Syllabus)

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