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

A current-carrying conductor is clench in totally vertical direction. In order to produce a clockwise magnetic feld around the conductor, the current should passed in the conductor:

from top towards bottom

from left towards right

from bottom towards top

from right towards left

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

Overloading is caused to:

Insulation of wire is damaged

fault in the appliances

accidental hike in supply voltage

All of the above

4 / 25

The commercial motors use a soft iron core on which the coil is wound because

to increase the power of the electric motor

to decrease the power of the electric motor

to reduce the power of the electric motor.

none

5 / 25

Which of the following is not attracted by a magnet:

Steel

cobalt

nickel

brass

6 / 25

The magnetic feld inside a long straight solenoid carrying current is

zero

same at all points

uneven

none of these

7 / 25

The deflection of the galvanometer becomes zero the moment the motion of

magnet stops.

magnet starts

magnet remains constant

none of these

8 / 25

The law states that if the forefinger indicates the direction of the magnetic field and thumb shows the direction of motion of conductor, then the middle finger will show the direction of induced current

fleming left hand rule

Fleming right hand rule

ohms law

none

9 / 25

The instrument used for measuring electric current is:

galvanometer

ammeter

voltmeter

potentiometer

10 / 25

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

11 / 25

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

12 / 25

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

13 / 25

True test of charge is

Attraction only

Repulsion only

Both attraction and repulsion

None of the above

14 / 25

The commercial unit of electric energy is

horse power

joule/hour

kilowatt hour

mega-watt hour

15 / 25

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

V = I R

I=VR

R=VI

all of these

16 / 25

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

vary continuously

does not change

reduces substantially

increases heavily

17 / 25

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

6 ohm

8 Ohm

2 ohm

10 ohm

18 / 25

The bluish colour of water in deep sea is due to:

the presence of algae and other plants found in water

refection of the sky in water

scattering of light

absorption of light by the sea

19 / 25

Why don’t planets twinkle?

Intensity of light entering our eye is infinity

Intensity of light entering our eye is one.

Intensity of light entering our eye is zero.

Intensity of light entering our eye is two.

20 / 25

The density of the atmosphere, as we know goes on decreasing as the distance above the sea level increases,this phenomeneon is called

Atmospheric refraction

Refraction of light

Atmospheric Reflection

None

21 / 25

When a person can see faraway objects but not nearby objects.

Far – sightedness

Myopia

Astigmatism

None

22 / 25

Astigmatism can be corrected

convex lens

concave lenses

cyclindrical lens

bifocal lens

23 / 25

The sky appears black to an astronaut as there is no

refraction of light

scattering of light

reflection of light

Dispersion of light

24 / 25

Visible spectrum is the band of coloured components of a

red light beam

white light beam

blue light beam

black light beam

25 / 25

The refractive index of glass is least 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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