FUNDAMENTAL PHYSICS (One-Liner + MCQs)

The shortest wavelength for audible sound is:

• (A) 0.7 centimeter
• (B) 1.7 centimeter
• (C) 1.6 centimeter
• (D) 2.0 centimeter

Sound waves are ________ waves.

• (A) Transverse
• (B) Longitudinal
• (C) Electromagnetic
• (D) Electronic

The velocity of sound in the air (vacuum) is:

• (A) 111 m/sec
• (B) 221 m/sec
• (C) 331 m/sec
• (D) 431 m/sec

The velocity of light in the air (vacuum) is:

• (A) 2 × 10⁸ m/sec
• (B) 3 × 10⁸ m/sec
• (C) 4 × 10⁸ m/sec
• (D) 5 × 10⁸ m/sec

Which of the following layers make radio transmission possible?

• (A) Troposphere
• (B) Ionosphere
• (C) Mesosphere
• (D) Stratosphere

Twinkling of stars is caused by _______ of light.

• (A) Reflection
• (B) Refraction
• (C) Polarization
• (D) Interference

Which of the following determines the loudness and softness of the sound?

• (A) Frequency
• (B) Wave velocity
• (C) Amplitude
• (D) Oscillation

The spherical shape of a small drop of rain is due to:

• (A) Viscosity
• (B) Gravity
• (C) Surface tension
• (D) Atmospheric pressure

A person presses the earth least where he is:

• (A) Sitting
• (B) Standing
• (C) Lying on the ground
• (D) Running

Wind energy is the _______ energy.

• (A) Transverse
• (B) Mechanical
• (C) Kinetics
• (D) Potential