Physics Past Questions

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1406

An object of mass 400g and density 600kgm^-3 is suspended with a sting so that half of it is immersed in paraffin of density 900kgm^-3. The tension in the string is

A. 1.0N
B. 3.0N
C. 4.0N
D. 5.0N

View Answer & Discuss (12) JAMB 1993

1407

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

View Answer & Discuss (1) JAMB 1993

1408

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

View Answer & Discuss (14) JAMB 1993

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1409

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

View Answer & Discuss (7) JAMB 1993

1410

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

View Answer & Discuss (5) JAMB 1993

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