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.Management Sciences
Category: Physics Mcqs
Waves produced at the surface of water by a pencil executing vibrating motion if held vertically at a frequency of 50Hz are__________________?
A. Longitudinal
B. Transverse
C. Periodic
D. both A and C
Depletion region of a junction is formed_____________?
A. during the manufacturing process
B. under forward bias
C. under reverse bias
D. when temperature varies
Why gamma rays are used to kill bacteria to sterilize surgical equipment etc ?
A. Chargeless
B. Massless
C. Highly penetrating
D. All of above
X-rays are diffracted by a crystal but not by a diffraction grating because_____________?
A. The ions in a crystal are well arranged
B. The lines in a diffraction grating cannot reflect X-rays.
C. The penetration power of X-rays is high in a diffraction grating
D. The wavelengths of X-rays are of the same order of magnitude as the separation between atoms in a crystal
Pair production cannot take place in a vacuum as ________________?
A. Mass is not conserved
B. Energy is not conserved
C. Momentum is not conserved
D. The chargee is not conserved
Which of the following substances posses the highest elasticity ?
A. Rubber
B. Steel
C. Glass
D. Copper
We can produce heat by________________?
A. Frictional process
B. Chemical processes
C. Electrical processes
D. All of the above
A choke is used as a resistance in_________________?
A. DC circuit
B. AC circuits
C. Both AC and DC circuit
D. Full wave rectifier circuit
Hydrogen atom does not emit X-rays because _________________?
A. its energy levels are too close to each other
B. its energy levels are too far apart
C. it is too small in size
D. it has a single electron
Thermocouples convert___________________?
A. heat energy into electrical energy
B. heat energy into light energy
C. heat energy into mechanical energy
D. mechanical energy into heat energy
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