Physics Past Questions and Answers

Specific heat capacity 36.4 Jkg-1 K-1 of a body means that when 36.4J of heat energy is supplied to a body of

A Mass 100kg the temperature rises by 1k
B Mass 1kg, the temperature by 1000K
C Mass 1kg, the temperature rises by 1K
D Mass 100kg, the temperature rises by 1000k

Question 1352:

An electric drill rated 400W is used to drill a hole in copper of mass 400g in 20s. Calculate the rise in temperature if all the heat produced is absorbed by the copper. [specific heat capacity of copper = 400Jkg^-1K^-1]

A 100^oC
B 75^oC
C 50^oC
D 45^oC

Question 1353:

A solid of mass 0.5kg initially at 50^oC melts at 60^oC. Calculate the quantity of heat required to melt it completely. [specific heat capacity of the solid =2.0KJ kg^-1K^-1][Specific latent heat of fusion of solid =1.0 KJ kg^-1]

A 1500J
B 10000J
C 10500J
D 15000J

Question 1354:

Dew point is not affected by

A Temperature
B Wind
C The amount of water vapour in the atmosphere
D Atmospheric pressure

Question 1355:

The pressure P, volume V, and absolute temperature T of a given mass of an ideal gas change simultaneously. Which of the followng equations is correct about the gas?

A PV = \(\frac{constant}{T}\)
B \(\frac{P}{T} = Constant\)
C \(\frac{P}{V} = \frac{constant}{T}\)
D \(\frac{I}{T} = \frac{constant}{PV}\)