Jamb Physics 2020 Past Questions and Answers

Question 1:

• JAMB 2020

A few grains of table salt were put in a cup of cold water, kept at constant temperature and left undistributed. Eventually all the water tested salty. This action is due to?

A. Convection
B. Osmosis
C. Capillarity
D. Diffusion

Question 2:

• JAMB 2020

The force required to make an object of mass m, travelling with velocity v, turn in a circle of radius r is

A. \(\frac{mv^2}{r}\)
B. \(\frac{mr^2}{x}\)
C. \(\frac{mr}{v}\)
D. \(\frac{mv}{r^2}\)

Question 3:

• JAMB 2020

A machine gun with a mass of 5kg fires a 50g bullet at a speed of 100 ms\(^{-1}\). The recoil speed of the machine gun is

A. 0.5 ms\(^{-1}\)
B. 1.5 ms\(^{-1}\)
C. 1 ms\(^{-1}\)
D. 2ms\(^-1\)

Question 4:

• JAMB 2020

If in a simple pendulum experiment the length of the inextensible string is increased by a factor of four, its period is increased by a factor of?

A. 4
B. \(\frac{\pi}{2}\)
C. \(\frac{1}{4}\)
D. 2

Question 5:

• JAMB 2020

In what range of temperature is the expansion of water anomalous?

A. +208\(^o\)C to +212\(^o\)C
B. -80\(^o\)C + -76\(^o\)C
C. 0\(^o\)C to +4\(^o\)C
D. -4\(^o\)C to +0\(^o\)C