WBCS Questions and Answers on General Science (Physics) P8

<< Prev PHYSICSNext >>

---

Page 8

147771. Light-year is a unit of

A

Light

B

Intensity of light

C

Time

D

Distance.

D

Correct Answer: D. Distance.
Explanation: The light-year is a unit of length used to express astronomical distances and is equivalent to about 9.46 trillion kilometers (9.46×10¹² km) or 5.88 trillion miles.

155972. Hubble is a

A

Space telescope

B

Star

C

Nuclear weapon

D

Musical instrument

A

Correct Answer: A. Space telescope

255973. Which of the following is used in the preparation of nuclear bombs?

A

zirconium

B

uranium

C

molybdenum

D

vanadium

B

Correct Answer: B. uranium

159774. The electromagnetic radiation that is emitted during radio-active disintegration is

A

Ultraviolet rays

B

Infra-red rays

C

X-rays

D

γ-rays (Gamma Rays

D

Correct Answer: D. γ-rays (Gamma Rays

148075. A clear piece of glass immersed in glycerol cannot be seen separately because the comparison to the refractive index of glycerol, the refractive index of glass is

A

Nearly equal

B

This does not depend on the refractive index

C

Greater

D

Lesser.

A

Correct Answer: A. Nearly equal

151076. When white light is passed through a glass prism, which of the following colors is refracted the most?

A

Orange

B

Violet

C

Blue

D

Red

B

Correct Answer: B. Violet

255377. Which one of the following is not the unit of heat?

A

calorie

B

kilocalorie

C

kilojoule

D

watt

D

Correct Answer: D. watt

158978. A. C is converted to D.C. by

A

Transformer

B

Motor

C

Rectifier

D

Dynamo

C

Correct Answer: C. Rectifier

152579. If the density of air is 1.30 g/lit., what is the volume occupied by 7.8 g of air?

A

6.5 lit.

B

10.10 lit.

C

10 lit.

D

6 lit

D

Correct Answer: D. 6 lit

160380. The reaction that occurs in nuclear reactors is

A

Nuclear fission

B

Nuclear isomerization

C

Nuclear fusion

D

Spallation

A

Correct Answer: A. Nuclear fission

---

<< Prev PHYSICSNext >>