941. Which one of the following waves cannot be polarized:
A. X-Rays
B. Sound Waves
C. Radi Waves
D. Ultraviolet Rays
942. Alternating current is converted to direct current by a:
A. Motor
B. Dynamo
C. Transformer
D. Rectifier
943. At resonance, the value of the power factor in an L.C.R series circuit is:
A. Zero
B. 1/2
C. Infinite
D. One
944. Two parallel wires carrying current in the opposite direction:
A. Repel each other
B. Attract each other
C. Do Not attract each other
D. Get rotated perpendicular to each other
945. If the distance between two charges is doubled, the Coulomb force will become:
A. One Fourth
B. Double
C. Half
D. Same
946. The penetrating power of X-Rays increases with:
A. Increase in its velocity
B. Decrease in its velocity
C. Increase in its intensity
D. Decrease in its intensity
947. Some amount of heat given to gas under isothermal conditions will result in:
A. Doing external work
B. Rise in temperature
C. Working outside and changing the temperature
D. An increase in internal Energy
948. The heaviest class of elementary particle consists of:
A. Photons
B. Leptons
C. Masons
D. Baryons
949. The Quantum number which is not involved in describing the orbit of an atomic electron is:
A. n
B. m
C. l
D. s
950. The Ionization energy of an atom relative to the binding energy of its nucleus is:
A. Greater
B. The same
C. Smaller
D. Sometimes greater and sometimes smaller
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