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

Relative strength of magnetic field at a point in the space adjoining the magnet is shown by the:

length of magnet

thickness of magnet

degree of closeness of the field.

resistance offered by the surroundings

3 / 25

The nature of magnetic field line passing through the centre of current carrying circular loop is:

circular

ellipse

parabolic

straight line

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

In electric motor, to make the coil rotating constantly in the identical direction, current is reversed in the coil after every half rotation by a device called:

carbon brush

commutator

slip ring

armature

6 / 25

The name of the effect being produced by the moving magnet

Electromagnetic induction

Electromagnetic conduction

Electromagnetic repulsion

Electromagnetism

7 / 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

8 / 25

To determine the direction of force experienced by a current carrying conductor placed in a uniform magnetic feld.

Fleming left hand rule

Fleming right hand rule

ohms law

none

9 / 25

Electrical resistivity of a given metallic wire depends upon:

Its length

Its thickness

Its shape

Nature of the material Explanation:

10 / 25

To get 2 Ω resistance using only 6 Ω resistors, the number of them required is

2

3

4

6

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

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

Resistance

Reluctance

Conductance

inductance

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 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

The absorption of light by a molecule depends on the

wavelength and the size of the molecule

wavelength

size of molecules

none

20 / 25

In an experiment to trace the path of a ray of light through a triangular glass prism, a student would observe that the emergent ray

is parallel to the incident ray.

is along the same direction of incident ray

gets deviated and bends towards the thinner part of the prism.

gets deviated and bends towards the thicker part (base) of the prism.

21 / 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.

22 / 25

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

Single chromatic

Dichromatic

Monochromatic

none

23 / 25

The defect the eye cannot focus objects both horizontally and vertically at the same time

Far – sightedness

Myopia

Astigmatism

none

24 / 25

Astigmatism can be corrected

convex lens

concave lenses

cyclindrical lens

bifocal lens

25 / 25

The colour of the clear sky blue due to

refraction of light

scattering of light

reflection of light

Dispersion of light

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CBSE Class X – Science Physics Exam (Full Syllabus)

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