JEE PHYSICS UNIT 10
QUIZ NO 2
TOTAL QUESTIONS = 20
1. The time period of a simple pendulum of length L is proportional to
A. √L
B. L
C. 1/√L
D. 1/L
2. In simple harmonic motion, the restoring force is
A. Proportional to displacement
B. Proportional to velocity
C. Proportional to acceleration
D. Constant
3. The phase difference between displacement and acceleration in simple harmonic motion is
A. 0
B. π/2
C. π
D. 2π
4. The frequency of a wave is doubled. Its wavelength in a given medium will be
A. Doubled
B. Halved
C. Unchanged
D. Quadrupled
5. The speed of a transverse wave on a stretched string depends on
A. Tension and mass per unit length
B. Frequency and wavelength
C. Amplitude and frequency
D. Tension and frequency
6. In a standing wave, the distance between two consecutive nodes is
A. λ
B. λ/2
C. λ/4
D. 2λ
7. The energy of a simple harmonic oscillator is
A. Proportional to amplitude
B. Proportional to amplitude squared
C. Independent of amplitude
D. Proportional to frequency
8. The phenomenon of beats occurs when two sound waves of
A. Same frequency interfere
B. Slightly different frequencies interfere
C. Widely different frequencies interfere
D. Same amplitude interfere
9. The Doppler effect is a change in
A. Amplitude due to relative motion
B. Frequency due to relative motion
C. Phase due to relative motion
D. Speed due to relative motion
10. The fundamental frequency of an open organ pipe of length L is
A. v/2L
B. v/L
C. v/4L
D. 2v/L
11. The total mechanical energy in simple harmonic motion is
A. Constant
B. Zero
C. Proportional to time
D. Proportional to displacement
12. The restoring force in simple harmonic motion is given by
A. F = -kx
B. F = kx
C. F = -k/v
D. F = k/v
13. The time period of a mass m attached to a spring of constant k is
A. 2π√(m/k)
B. 2π√(k/m)
C. 2π√(m*g/k)
D. 2π√(k/m*g)
14. In a transverse wave, the particle displacement is
A. Parallel to wave propagation
B. Perpendicular to wave propagation
C. Circular
D. Elliptical
15. Resonance occurs when
A. The frequency of external force matches the natural frequency
B. Two waves of different frequencies superpose
C. A wave reflects back into the medium
D. The amplitude of oscillation decreases over time
16. The intensity of a wave is proportional to
A. Amplitude
B. Amplitude squared
C. Frequency
D. Frequency squared
17. The principle of superposition states that
A. Waves reflect at boundaries
B. Waves change speed in different media
C. The resultant displacement is the sum of individual displacements
D. Waves diffract around obstacles
18. The equation of a simple harmonic wave is
A. y = A sin(ωt + φ)
B. y = A cos(ωt)
C. y = A tan(ωt)
D. y = A exp(ωt)
19. The speed of sound in air increases with
A. Increase in pressure
B. Increase in temperature
C. Increase in humidity
D. Decrease in density
20. In a damped harmonic oscillator, the amplitude decreases
A. Exponentially with time
B. Linearly with time
C. Quadratically with time
D. Logarithmically with time
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