MCQs on General Science for Competitive Exams UPSC, SSC, RAIL P13

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Page 13

1566121. The internal resistance of which of the instruments is the highest?

A

Voltmeter

B

Mili ammeter

C

Galvanometer

D

Ammeter

A

Correct Answer: A. Voltmeter

1508122. For the same Kinetic energy, the momentum shall be maximum for

A

Deuteron

B

Alpha Particle

C

Electron

D

Proton

B

Correct Answer: B. Alpha Particle

1581123. 75% of a radioactive element decays in 6 hours. It's half-life period is

A

1/6 hours

B

3 hours

C

2 hours

D

4 hours

B

Correct Answer: B. 3 hours

1536124. The energy radiated by the Sun is because of

A

Radioactive decay

B

Photo-electric effect

C

Nuclear fusion

D

Nuclear fission

C

Correct Answer: C. Nuclear fusion

1607125. Which of the following is a good nuclear fuel?

A

Neptunium 239

B

Thorium 236

C

Uranium 238

D

Plutonium 239

D

Correct Answer: D. Plutonium 239

1600126. Production of beats is a result of the phenomenon of

A

Reflection

B

Superposition

C

Resonance

D

Interference

D

Correct Answer: D. Interference

1464127. A piece of a metal plate with a circular hole is heated. If the metal plate expands on heating, the diameter of the hole will

A

Increase or decrease depending on the diameter of the hole

B

Increase or decrease depending upon the metering of the plate

C

increase

D

Decrease.

C

Correct Answer: C. increase

1537128. If a magnet is moved fast towards a coil, the induced electromotive force does not depend on

A

The speed of the magnet.

B

The resistance of the coils.

C

The number of turns of the coil.

D

Pole strength of the magnet

A

Correct Answer: A. The speed of the magnet.

1601129. The viewfinder of a motor car is a

A

Convex mirror

B

Convex lens

C

Plane mirror

D

Concave mirror

A

Correct Answer: A. Convex mirror

2554130. The intensity of earthquake is measured by

A

barometer

B

hydrometer

C

polygraph

D

seismograph

D

Correct Answer: D. seismograph

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