Physics Study Material for UPSC, IAS, Gate, SSC, TNPSC, TRB, TET Exams - 1

Question: 1

Which of the following are most penetrating?

(A) Alpha –rays

(B) Beta rays

(C) Gamma rays

(D) X rays

Ans: C

Gamma rays

Question: 2

The diode is a device which forces the current

(A) not to flow in any direction

(B) to flow in both direction

(C) to flow in one direction

(D) none of these

Ans: C

to flow in one direction

Question: 3

Transformer are used in between the electric power stations an homes or factories in order to

(A) minimize the power loss in transmission cables

(B) minimize the voltage drop in transmission cables

(C) minimize the current drop in the transmission cables

(D) provide constant voltage at the user end

Ans: D

provide constant voltage at the user end

Question: 4

Which one of the following is correct when a body moving a circular path with constant speed?

(A) The body has constant retardation

(B) The body has constant velocity and variable speed

(C) The body has variable acceleration

(D) The body has constant acceleration

Ans: C

The body has variable acceleration

Question: 5

Clear nights are cooler than cloudy nights because of

(A) radiation

(B) condensation

(C) conduction

(D) isolation

Ans: A

radiation

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