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

Which of the subsequent is not attracted by a magnet:

Steel

Cobalt

Brass

Nickel

2 / 25

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

uneven

zero

same at all points

None of these

3 / 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)

4 / 25

Direction of rotation of a coil in electric motor is intent by:

fleming’s right hand rule

fleming’s left hand rule

faraday law of electromagnetic inductors

None of these

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

A magnet is moved towards a coil (i) quickly (ii) slowly. The induced potential difference:

more in (ii) than in (i) case

same in both

can’t say

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

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

10 / 25

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

11 / 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

12 / 25

Ohm’s law express that:

Resistance increases as current increases

Resistance decreases as current increases

Resistance increases as voltage increases

Current increases as voltage increases

13 / 25

The condition for the credibility of Ohm’s law is that the

Temperature should remain constant

Current should be proportional to voltage

Resistance must be wire wound type

All of the above

14 / 25

Electrical resistivity of a given metallic wire depends upon:

Its length

Its thickness

Its shape

Nature of the material

15 / 25

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

electrical inductivity

electrical resistivity

none

16 / 25

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.

17 / 25

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

Electrical power

electrical inductivity

electrical resistivity

none

18 / 25

A clear sky appears blue, because:

blue light gets absorbed in the atmosphere

ultraviolet radiations are absorbed in the atmosphere

violet and blue lights get scattered more than the lights of all other colours by the atmosphere

lights of all other colours is scattered more than the violet and blue colour lights by the atmosphere

19 / 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

20 / 25

What would have been the colour of sky if the earth had no atmosphere

white

dark

pink

no color

21 / 25

When a fine beam of sunlight enters a smoke filled room, smoke particles become visible due to scattering of light by these particles

Tyndall effect

Dispersion of light

Scattering of light

Reflection of light

22 / 25

When sunlight passes through a canopy of a dense forest, tiny water droplets in the water scatter light.This is an example of

Tyndall effect

Dispersion of light

Scattering of light

Rrefraction of light

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 SI unit of Power of a lens is

Hertz

Dipotre

newton

none

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CBSE Class X – Science Physics Exam (Full Syllabus)

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