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

A current through a horizontal power line flows from south to North direction. The direction of magnetic field line 0.5m above it is:

North

South

West

East

3 / 25

A soft iron bar is introduced inside the current carrying solenoid. The magnetic field inside the solenoid:

will decrease

will remains same

will increase

will become zero

4 / 25

Overloading is caused to:

Insulation of wire is damaged

fault in the appliances

accidental hike in supply voltage

All of the above

5 / 25

Which of the following is not attracted by a magnet:

Steel

cobalt

nickel

brass

6 / 25

Commercial electric motors do not use

A permanent magnet to rotate the armature

Effectively large number of turns of conducting wire in the current carrying coil.

A soft iron core on which the coil is wound

An electromagnet to rotate the armature

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

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

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

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

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

12 / 25

Copper is not approved to make fuse wire because it:

is a good conductor of electricity

has a low melting point

has a high melting point

is not easily available

13 / 25

Electrical resistivity of a given metallic wire depends upon:

Its length

Its thickness

Its shape

Nature of the material

14 / 25

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

electrical inductivity

electrical resistivity

none

15 / 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.

16 / 25

The equivalent resistance of a series combination of two resistances is X Ohm. If the resistance are of 10 Ohm and 40 Ohm respectively, the value of X will be:

50 ohm

20 ohm

10 ohm

40 ohm

17 / 25

The unit of electric power may also be expressed as

volt-ampere

kilowatt-hour

watt-second

joule second

18 / 25

Which of the following statements is correct regarding the propagation of light of diferent colours of white light in air?

Red light moves the fastest.

Blue light moves faster than green light

All the colours of the white light travel with the same speed. (d)

Yellow light moves with the mean speed as that of red and the violet light.

19 / 25

Effect produced by scattering of light by the atmosphere.

Refraction effect

Tyndal effect

Dispersion

all of these

20 / 25

The splitting of light into its component colours is called

Dispersion of light

Scattering of light

Refraction of light

Reflection of light

21 / 25

The defect in a person can see nearby objects but not far away objects

Far-sightedness

Myopia

Astigmatism

none

22 / 25

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

Far – sightedness

Myopia

Astigmatism

none

23 / 25

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

Far – sightedness

Myopia

Astigmatism

None

24 / 25

The refractive index of glass is least for

violet color

red color

blue color

white color

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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