Class 10 Physics Practice Quiz – RBSE – 50 Questions

Question 1

A ray of light incident normally on a plane mirror:

Accepted Answer

Is reflected back along the same path.

Question 2

An object is placed at the center of curvature of a concave mirror. The image formed will be:

Accepted Answer

Real, inverted, and same size as the object.

Question 3

If the speed of light in vacuum is 'c' and in a medium is 'v', the refractive index of the medium (n) is given by:

Accepted Answer

n = c/v

Question 4

A convex lens has a focal length of +25 cm. Its power will be:

Accepted Answer

+4 D

Question 5

A person cannot see distant objects clearly but can see nearby objects clearly. This defect of vision is known as:

Accepted Answer

Myopia

Question 6

The phenomenon of splitting of white light into its constituent colors when passing through a prism is called:

Accepted Answer

Dispersion

Question 7

Ohm's Law states that for a metallic conductor at constant temperature:

Accepted Answer

V = I * R

Question 8

The resistance of a conductor is directly proportional to its:

Accepted Answer

Length

Question 9

When three resistors R1, R2, and R3 are connected in series, their equivalent resistance (Req) is:

Accepted Answer

Req = R1 + R2 + R3

Question 10

The heating effect of electric current is commonly known as:

Accepted Answer

Joule's Law

Question 11

Magnetic field lines:

Accepted Answer

Do not intersect each other.

Question 12

The magnetic field inside a long straight solenoid carrying current:

Accepted Answer

Is uniform at all points.

Question 13

Fleming's Left-Hand Rule is used to determine the direction of:

Accepted Answer

Force experienced by a current-carrying conductor in a magnetic field.

Question 14

The phenomenon of electromagnetic induction involves:

Accepted Answer

Production of electric current due to a changing magnetic field.

Question 15

Which of the following is a conventional source of energy?

Accepted Answer

Fossil fuels

Question 16

The mirror formula for a spherical mirror is:

Accepted Answer

1/f = 1/u + 1/v

Question 17

For a spherical mirror, magnification (m) is given by:

Accepted Answer

Both a and c

Question 18

Light enters from air into glass having a refractive index of 1.50. What is the speed of light in the glass? (Speed of light in vacuum = 3 x 10^8 m/s)

Accepted Answer

2 x 10^8 m/s

Question 19

Which type of lens is a converging lens?

Accepted Answer

Convex lens

Question 20

The defect of vision where the eye loses its power of accommodation due to aging is called:

Accepted Answer

Presbyopia

Question 21

The twinkling of stars is due to:

Accepted Answer

Atmospheric refraction of starlight.

Question 22

The rate of flow of electric charge is called:

Accepted Answer

Electric current

Question 23

The SI unit of electrical resistance is:

Accepted Answer

Ohm

Question 24

When two resistors R1 and R2 are connected in parallel, the equivalent resistance (Req) is given by:

Accepted Answer

1/Req = 1/R1 + 1/R2

Question 25

Which of the following is NOT a correct formula for electric power (P)?

Accepted Answer

P = I/R

Question 26

Outside a bar magnet, the magnetic field lines emerge from:

Accepted Answer

North pole and enter the South pole.

Question 27

The direction of the magnetic field around a straight current-carrying conductor is given by:

Accepted Answer

Right-Hand Thumb Rule

Question 28

An electric motor converts:

Accepted Answer

Electrical energy into mechanical energy.

Question 29

In domestic electric circuits, the live wire has a color code of:

Accepted Answer

Red

Question 30

Which of the following is a non-renewable source of energy?

Accepted Answer

Natural gas

Question 31

According to the law of reflection, the angle of incidence is equal to the angle of:

Accepted Answer

Reflection

Question 32

Concave mirrors are used by dentists to see larger images of teeth because:

Accepted Answer

They can form virtual, erect, and magnified images when the object is placed between the pole and the focal point.

Question 33

The critical angle is defined for light going from:

Accepted Answer

Denser to rarer medium.

Question 34

The power of a lens depends on its:

Accepted Answer

Focal length

Question 35

Hypermetropia is corrected by using a:

Accepted Answer

Convex lens

Question 36

The blue color of the sky is primarily due to:

Accepted Answer

Scattering of light by tiny atmospheric particles.

Question 37

The SI unit of electric potential difference is:

Accepted Answer

Volt

Question 38

What happens to the resistance of a wire if its length is doubled and its cross-sectional area is halved?

Accepted Answer

Resistance becomes four times.

Question 39

The amount of heat produced in a resistor is given by:

Accepted Answer

All of the above

Question 40

An electric fuse is used in electrical circuits to:

Accepted Answer

Protect circuits and appliances from high current.

Question 41

The direction of the magnetic field at a point is given by the direction of:

Accepted Answer

The North pole of a compass needle placed at that point.

Question 42

Which device works on the principle of electromagnetic induction?

Accepted Answer

Electric generator

Question 43

The type of current whose direction reverses periodically is called:

Accepted Answer

Alternating Current (AC)

Question 44

In a hydroelectric power plant, potential energy of water is converted into:

Accepted Answer

Kinetic energy, then electrical energy

Question 45

Which device directly converts solar energy into electrical energy?

Accepted Answer

Solar cell (photovoltaic cell)

Question 46

A ray of light passing through the principal focus of a convex lens will, after refraction:

Accepted Answer

Emerge parallel to the principal axis.

Question 47

The SI unit of electric charge is:

Accepted Answer

Coulomb

Question 48

Overloading in an electric circuit occurs due to:

Accepted Answer

Connecting too many appliances to a single socket.

Question 49

The ability of the eye lens to adjust its focal length to see objects at different distances is called:

Accepted Answer

Accommodation

Question 50

Which of the following energy sources causes the least environmental pollution?

Accepted Answer

Solar energy

Question 51

Which phenomenon causes the sky to appear red at sunrise and sunset?

Accepted Answer

Scattering

Question 52

The unit of power of a lens is:

Accepted Answer

Dioptre

Question 53

What is the phenomenon called when a light ray deviates from its path while passing from one transparent medium to another?

Accepted Answer

Refraction

Question 54

Which of the following materials is generally NOT used for making a convex lens?

Accepted Answer

Clay

Question 55

What is the SI unit of electric current?

Accepted Answer

Ampere

Question 56

Which rule is used to determine the direction of induced current?

Accepted Answer

Fleming's Right-Hand Rule

Question 57

What is the effect of increasing the number of turns in a solenoid on its magnetic field strength?

Accepted Answer

Increases the field strength.

Question 58

Which of the following is a disadvantage of using fossil fuels?

Accepted Answer

They cause air pollution.

Question 59

The phenomenon of light bending at the sharp edges of an opaque obstacle is called:

Accepted Answer

Diffraction

Question 60

What is the resistance of an ideal ammeter?

Accepted Answer

Zero

Quick Navigator

Site Exploration

Class 10 Physics Practice Quiz – RBSE – 50 Questions

Ready to begin your session?

Prep Doubt Hub

Raise a Doubt Cancel reply

Quick Navigator

Site Exploration

Ready to begin your session?

Prep Doubt Hub

Raise a Doubt Cancel reply

Daily Limit Reached