Physics 1993 Jamb Past Questions and Answers

Question 11 :

• JAMB 1993

The thermometric properties of the thermocouple is that is

A. E.m.f. changes with temperature
B. Resistance changes with temperature
C. Volume changes with temperature
D. Pressure changes with resistance

Question 12 :

• JAMB 1993

A metal rod 800mm long is heated from 10^oC to 95^oC. If it expands by 1.36mm, the linear expansivity of the metal is

A. 2.0 x 10²K^-1
B. 2.0 x 10²K^-1
C. 5.0 x 10^-3K^-1
D. 2.0 x 10^-5K^-1

Question 13 :

• JAMB 1993

When the volume of a given mass of gas is halved and its temperature doubled, the pressure

A. Remains constant
B. Increases by a factor of 4
C. Increases by a factor of 3
D. Decreases by a factor of 4

Question 14 :

• JAMB 1993

200g of water at 90°C is mixed with 100g of water at 30°C. What is the final temperature?

A. 50^oC
B. 60^oC
C. 70^oC
D. 80^oC

Question 15 :

• JAMB 1993

The relationship between L and the wavelength I of the stationary wave is

A. 2L = \(\lambda\)
B. L = \(\lambda\)
C. L = \(\frac {\lambda}{3}\)
D. 4L = 3 \(\lambda\)