Jamb Physics 2018 Past Questions and Answers

Question 76:

• JAMB 2018

To keep a vehicle moving at a constant speed V requires power P from the engine. The force provided by the engine is

A. \(\frac{P}{v}\)
B. (\(\frac{1}{2}\))V
C. PV
D. \(\frac{P}{V^2}\)

Question 77:

• JAMB 2018

Which of the following is the dimension of pressure

A. ML\(^{−1}\)T\(^{−2}\)
B. MLT\(^{−2}\)
C. ML\(^{2}\)T\(^{3}\)
D. ML\(^{−3}\)

Question 78:

• JAMB 2018

Palm oil from a bottle flows out more easily after it has been heated because the

A. Molecules are given energy during the heating
B. Friction between oil layers is reduced
C. Oil molecules force each other out
D. Adhesion between the oil molecules and those of the bottle is increased

Question 79:

• JAMB 2018

A ball of mass 5.0kg hits a smooth vertical wall normally with a speed of 2ms\(^{-1}\). Determine the magnitude of the resulting impulse

A. 20.0kgms\(^{-1}\)
B. 10.0kgms\(^{-1}\)
C. 5.0kgms\(^{-1}\)
D. 2.5kgms\(^{-1}\)

Question 80:

• JAMB 2018

The efficiency of energy conversion on the energy flow through a hydroelectric power is?

A. \(\frac{E1}{E2}\)
B. \(\frac{E3}{E2}\)
C. \(\frac{E2}{E1}\)+ E2
D. \(\frac{E2}{E3}\) + E1