Q.15 Food being cooked in microwave oven is an example of
A) Beats C) Resonance
B) Overtones D) Stationary waves
A) Beats C) Resonance
B) Overtones D) Stationary waves
Q.18 What should be the length of simple pendulum whose period is 6.28 second at a place where g = 10 ms2.
A) 0.28 m C) 6.28 m
B) 10.8 m D) 10 m
A) 0.28 m C) 6.28 m
B) 10.8 m D) 10 m
Q.21 Resonance occurs when the driving frequency is:
A) Greater than natural frequency C) Less than natural frequency
B) Unequal the natural frequency D) Equal to the natural frequency
Q.22 The red shift measurement of Doppler effect of galaxies indicate that the universe is:
A) Expanding C) Stationary
B) Contracting D) Oscillating
Q.23 Frequency audible range to human hearing lies in the range:
A) 2-2000 kHz C) 20-20000 Hz
B) 15-50000 kHz D) 20-20000 kHz
Q.24 Tuning a radio is a best example of:
A) Natural resonance C) Free resonance
B) Mechanical resonance D) Electrical resonance
A) Greater than natural frequency C) Less than natural frequency
B) Unequal the natural frequency D) Equal to the natural frequency
Q.22 The red shift measurement of Doppler effect of galaxies indicate that the universe is:
A) Expanding C) Stationary
B) Contracting D) Oscillating
Q.23 Frequency audible range to human hearing lies in the range:
A) 2-2000 kHz C) 20-20000 Hz
B) 15-50000 kHz D) 20-20000 kHz
Q.24 Tuning a radio is a best example of:
A) Natural resonance C) Free resonance
B) Mechanical resonance D) Electrical resonance