1st Year Physics | Most Important Mcqs | don't miss these Mcqs

 🧠 IMPORTANT MCQs (Guess + Past Based)

🔹 Chapter 1: Measurements

Light year is unit of:

A) Time

B) Distance

C) Speed

D) Energy

Least count of vernier caliper is:

A) 0.1 cm

B) 0.01 cm

C) 0.001 cm

D) 1 cm

Dimensional formula of velocity:

A) LT⁻¹

B) LT⁻²

C) L²T⁻¹

D) T⁻¹

🔹 Chapter 2: Vectors

Resultant of two equal vectors at 90°:

A) √2A

B) 2A

C) A

D) 0

Scalar quantity is:

A) Force

B) Velocity

C) Work

D) Momentum

🔹 Motion & Force

Rate of change of momentum =

A) Work

B) Power

C) Force

D) Energy

Inertia depends on:

A) Velocity

B) Mass

C) Force

D) Acceleration

🔹 Work & Energy

If velocity doubles, KE becomes:

A) Double

B) Half

C) Four times

D) Same

Unit of power is:

A) Joule

B) Watt

C) Newton

D) Pascal

🔹 Circular Motion

Centripetal force acts:

A) Outward

B) Inward

C) Upward

D) Downward

🔹 Fluid Dynamics

Pressure increases with:

A) Height

B) Depth

C) Area

D) Volume

SI unit of pressure:

A) Joule

B) Pascal

C) Watt

D) Newton

🔹 Oscillations

Time period of SHM depends on:

A) Amplitude

B) Mass & spring constant

C) Velocity

D) Force

🔹 Waves

Wave speed =

A) f/λ

B) fλ

C) λ/f

D) f²λ

Frequency unit:

A) Hz

B) Joule

C) Watt

D) Newton

🔹 Optics

Image in plane mirror is:

A) Real

B) Virtual

C) Inverted

D) Smaller

Refractive index depends on:

A) Speed of light

B) Density

C) Temperature

D) All

🔹 Heat & Thermodynamics

Heat transfer in solids:

A) Radiation

B) Conduction

C) Convection

D) Reflection

SI unit of temperature:

A) °C

B) K

C) °F

D) Joule

🔹 Mixed Important

Density =

A) m/v

B) v/m

C) m×v

D) v²

Momentum =

A) mv

B) m/v

C) v/m

D) m²v

Acceleration due to gravity =

A) 9.8 m/s²

B) 10 m/s

C) 9.8 m

D) 10 m/s²

✅ ANSWERS (Check at end)

1-B

2-B

3-A

4-A

5-C

6-C

7-B

8-C

9-B

10-B

11-B

12-B

13-B

14-B

15-A

16-B

17-D

18-B

19-B

20-A

21-A

22-A