For which Diode is used ?
(a) modulation
(b) oscillation
(c) amplification
(d) purification
Who among the following developed the technology of underground nuclear explosion?
(a) Dr. Homi J. Bhabha
(b) Dr. Vikram Sarabhai
(c) Dr. Raja Ramanna
(d) Dr. P. K. Iyengar
Which among the following types of coal produces most heat per unit ?
(a) Coal
(b) Lignite
(c) Anthracite
(d) Pit
Which among the following waves is used for communication by artificial satellites ?
(a) Micro waves
(b) Radio waves
(c) Amplitude Modulation (AM)
(d) Frequency of 10 series
What is found in frequency modulation?
(a) Fixed frequency
(b) Fixed dimension
(c) Change in frequency and dimension
(d) Change in dimension only
When the speed of car is doubled, then what will be the breaking force of the car to stop it in the same distance ?
(a) four times
(b) two times
(c) half
(d) one-fourth
The dimension of which of the following is the same as that of impulse ?
(a) Volume
(b) Momentum
(c) Torque
(d) Change in the rate of momentum
Which among the following is the fundamental quantity ?
(b) Time
(c) Velocity
(d) Force
When a ring of metal is heated what happens to its hole?
(a) expands
(b) contracts
(c) it expands or contracts according
(d) it expands or contracts according to its coefficient of expansion
If the diameter of a capillary is doubled, then the rise of water in it will be
(a) two times
(b) half
(c) four times
(d) no change
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