Physics Past Questions

3751

The critical angle for light travelling from a transparent medium to air s measured as 340. The refractive index of the medium is

• A. 0.56
• B. 1.50
• C. 1.79
• D. 2.02
3752

The S.I unit for sound energy is

• A. Hz
• B. cd
• C. dB
• D. J
3753

The general definition of elastic modulus is

• A. $$\frac{stress}{strain}$$
• B. $$\frac{strain}{stress}$$
• C. $$stress \times strain$$
• D. $$\sqrt{\frac{stress}{strain}}$$
3754

The diagram above illustrates a simple barometer. Which distance measures the atmospheric pressure?

• A. PQ
• B. QR
• C. RS
• D. QS
3755

The property of a body to remain at rest or to continue in uniform motion in a straight line is called

• A. momentum
• B. Inertia
• C. impulse
• D. Energy