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Monday, 15 June 2026
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Physics Past Questions and Answers

Jamb 1978 Physics Questions

Question 16:
A few grains of table salt were put in a cup of water, kept at constant temperature and left undisturbed. Eventually all the water tasted salty. The action is due to
  • A Convection
  • B Osmosis
  • C Capillarity
  • D Diffusion
  • E Conductivity
View Answer & Explanation
Question 17:
A temperature 20°C is the same as
  • A 36<sup style='font-size: smaller;'>o</sup>F
  • B 68<sup style='font-size: smaller;'>o</sup>F
  • C 11.1<sup style='font-size: smaller;'>o</sup>F
  • D 43.1<sup style='font-size: smaller;'>o</sup>F
  • E 25<sup style='font-size: smaller;'>o</sup>F
View Answer & Explanation
Question 18:
The latent heat of fusion of ice is 80cal g-1. How much heat is required to change 10g of ice at QoC into water at the same temperature?
  • A 80 cal
  • B 10 cal
  • C 8 cal
  • D 800 cal
  • E 400 cal
View Answer & Explanation
Question 19:
A gas at pressure PNm\(^{-2}\) and temperature 27°C is heated to 77°C at constant volume. The new pressure is
  • A 0.85 PN-m<sup style='font-size: smaller;'>-2</sup>
  • B 0.86 PN-m<sup style='font-size: smaller;'>-2</sup>
  • C 1.16 PN-m<sup style='font-size: smaller;'>-2</sup>
  • D 1.18 PN-m<sup style='font-size: smaller;'>-2</sup>
  • E 2.85 PN-m<sup style='font-size: smaller;'>-2</sup>
View Answer & Explanation
Question 20:
The following are some units i. Ns ii. Mm iii. Nm-2 iv. JoK-1. What are the units of latent heat?
  • A I
  • B Ii
  • C Iii
  • D Iv
View Answer & Explanation