How it works Features Exams FAQ Pricing

EN

हिं

Physics - MOST IMPORTANT Bihar Police SI Previous Year Questions

Practice real questions from previous year exams of Bihar Police SI.

📘 Current Electricity📚 Electric Current

Q1

What is the S.I. unit of electric current?

🎯 Bihar Police SI (Excise Sub Inspector) Preliminary Examination-2025

A.

Joule

B.

Ampere

C.

Volt

D.

Kilowatt

📘 Human Eye📚 Parts of the Eye

Q2

What is the diameter of the human eyeball?

🎯 Bihar Police SI (Excise Sub Inspector) Preliminary Examination-2025

A.

$\displaystyle 4.5$ cm

B.

$\displaystyle 3.2$ cm

C.

$\displaystyle 0.8$ cm

D.

$\displaystyle 2.3$ cm

📘 Mechanical Properties of Solid📚 Elasticity

Q3

Which of the following materials is the most elastic?

🎯 Bihar Police SI (Excise Sub Inspector) Preliminary Examination-2025

A.

Plastic

B.

Rubber

C.

Steel

D.

Iron

📘 Light and Optics📚 Refraction and related Terminology

Q4

Why does a coin dropped in water appear to be raised from its surface?

🎯 Bihar Police SI (Excise Sub Inspector) Preliminary Examination-2025

A.

Refraction

B.

Reflection

C.

Diffraction

D.

Interference

📘 Thermal Properties of Matter📚 Change of Phase between Gases and Solids- Sublimation and Deposition

Q5

In the process of sublimation, what is the change in the state of matter?

🎯 Bihar Police SI (Excise Sub Inspector) Preliminary Examination-2025

A.

Solid to liquid and then to gas

B.

Gas directly to liquid

C.

Solid directly to gas

D.

Liquid to gas

📘 Work, Energy and Power📚 Transformation of Energy

Q6

To light a bulb using solar energy, the energy conversion that takes place is -

🎯 Bihar Police SI (Excise Sub Inspector) Preliminary Examination-2025

A.

Electrical energy to chemical energy

B.

Solar energy to light energy

C.

Solar energy to electrical energy

D.

Chemical energy to physical energy

📘 Current Electricity📚 Electric Power

Q7

What is the unit of 'electric power'?

🎯 Bihar Police SI Main Examination, 2023

A.

Joule

B.

Coulomb

C.

Volt

D.

Watt

📘 Units and Dimensions📚 Misc

Q8

A solid ball has a diameter of 4.2 cm and a density of 8.9 g/cm³. Find the mass of the ball.

🎯 Bihar Police SI Main Examination, 2023

A.

$\displaystyle 345.95$ g

B.

$\displaystyle 345.39$ g

C.

$\displaystyle 353.49$ g

D.

$\displaystyle 343.59$ g

📘 Light and Optics📚 Total Internal Reflection and Critical Angle

Q9

On which of the following principles do optical fibers work?

🎯 Bihar Police SI Main Examination, 2023

A.

Total internal reflection of light

B.

Scattering of light

C.

Total internal refraction of light

D.

Reflection of light

📘 Modern Physics📚 Misc

Q10

What is the characteristic of a Bose-Einstein condensate?

🎯 Bihar Police SI Main Examination, 2023

A.

High kinetic energy

B.

Low kinetic energy

C.

Very low kinetic energy

D.

Highest kinetic energy

📘 Fluid Mechanics📚 Pressure and its applications

Q11

At what temperature does water boil on mountains?

🎯 Bihar Police SI Main Examination, 2023

A.

At a temperature higher than at sea level

B.

At a temperature lower than at sea level

C.

At the same temperature as at sea level

D.

Water does not boil on mountains

📘 Fluid Mechanics📚 Pressure and its applications

Q12

How is blood pressure expressed?

🎯 Bihar Police SI Main Examination, 2023

A.

Diastolic/Systolic

B.

Systolic/Diastolic

C.

Venous pressure/Diastolic

D.

All of the above are true

📘 Work, Energy and Power📚 Law of Conservation of Energy

Q13

The energy of a freely falling body...

🎯 Bihar Police SI Main Examination, 2023

A.

increases

B.

remains constant

C.

decreases

D.

first increases, then decreases

📘 Instruments to Measure things📚 List of Instruments to Measure Physical Quantities

Q14

What is the name of the instrument used to measure the area of a planar figure by tracing its boundary on a map?

🎯 Bihar Police SI Main Examination, 2023

A.

Planimeter

B.

Anemometer

C.

Hygrometer

D.

Rotameter

📘 Atomic and Nuclear Physics📚 Misc

Q15

What is the change in angular momentum when an electron in a hydrogen atom moves from the first orbit to the second?

🎯 Bihar Police SI Main Examination, 2023

A.

$\displaystyle 6.64$ × $\displaystyle 10$ ⁻³⁴ Js

B.

$\displaystyle 4.12$ × $\displaystyle 10$ ⁻³⁴ Js

C.

$\displaystyle 2.21$ × $\displaystyle 10$ ⁻³⁴ Js

D.

$\displaystyle 1.05$ × $\displaystyle 10$ ⁻³⁴ Js

📘 Force and Motion📚 Physical Quantities related to Motion- acceleration, displacement, etc.

Q16

The ratio of displacement to distance is always :

🎯 Bihar Police SI Exam

A.

less than $\displaystyle 1$ .

B.

equal to $\displaystyle 1$ .

C.

greater than $\displaystyle 1$ .

D.

equal to or less than $\displaystyle 1$ .

📘 Human Eye📚 Parts of the Eye

Q17

The curvature of the eye lens can be modified by-

🎯 Bihar Police SI Exam

A.

Retina

B.

Ciliary muscles

C.

Pupil

D.

Iris

📘 Light and Optics📚 Use of Spherical Mirrors

Q18

Why is the use of a parabolic mirror in a telescope more beneficial than an objective convex lens? Select the most correct answer.

🎯 Bihar Police SI Exam

A.

Parabolic mirror does not have color related abnormality compared to convex lens.

B.

Parabolic mirror does not have spherical aberration compared to convex lens.

C.

Parabolic mirror does not have color related abnormality and spherical aberration compared to convex lens and mirror is lighter than convex lens.

D.

Parabolic mirror is much lighter than convex lens.

📘 Force and Motion📚 Circular Motion and related terms (angular displacement, time period, etc.)

Q19

In uniform circular motion, the following quantity remains constant-

🎯 Bihar Police SI Exam

A.

speed

B.

velocity

C.

momentum

D.

acceleration

📘 Sound📚 Characteristics of Sound waves- wavelength, time period, etc.

Q20

Sound waves travel in air as :

🎯 Bihar Police SI Exam

A.

in the form of electromagnetic waves

B.

in the form of transverse waves

C.

in the form of both transverse and longitudinal waves

D.

in the form of only longitudinal waves

🔐 Login to practice full set