Jamb Physics 2019 Past Questions and Answers

Question 81:

• JAMB 2019

If the attraction of the sun is suddenly ceased, the earth would continue to move in a straight line making a tangent with the original orbit. This statement is derived from Neutron's

A. First law of motion
B. Second law of motion
C. Third law of motion
D. Law of universal gravitation

Question 82:

• JAMB 2019

Heat may be transferred by conduction, convention and radiation. By which of these methods does heat travel through vacuum?

A. Conduction only
B. Convection only
C. Radiation only
D. All these methods

Question 83:

• JAMB 2019

The part of the human eye that does similar work as the diaphragm of a camera lens is the

A. Ciliary muscles
B. Pupil
C. Iris
D. Retina

Question 84:

• JAMB 2019

A projectile of mass 4kg is fired vertically and reaches a maximum height of 1m. Calculate the potential energy at the highest point
(g = 10ms\(^{-2}\)

A. 1800J
B. 1600J
C. 600J
D. 440J

Question 85:

• JAMB 2019

The length of the seconds hand of laboratory clock is 0.1m. Calculate the speed at the top of the seconds hand

A. 1.05 à— 10\(^{-2}\)ms\(^{-1}\)
B. 1.85 × 10\(^{-4}\)ms\(^{-1}\)
C. 9.50 à— 10\(^{-1}\)ms\(^{-1}\)
D. 5.25 à— 10\(^{-3}\)ms\(^{-1}\)