Waec Physics 1995 Past Questions and Answers

Question 36:

• WAEC 1995

What is the escape velocity of a body on the surface of the earth of radius R if the gravitational constant is G and the mass of the earth is M? (Neglect energy losses to the surroundings)

A. 2GR
B. 2G/R
C. 2GR²
D. 2GM/R

Question 37:

• WAEC 1995

A charge of 1.6 x 10^-10C is placed in a uniform electric field of intensity 2.0 x 10⁵NC^-1. What is the magnitude of the electric force exerted on the charge?

A. 3.2 x10⁵N
B. 1.8 x10⁵N
C. 3.2 x10^-5N
D. 1.8 x10^-5N
E. 4.0X10^-6N

Question 38:

• WAEC 1995

A balloon containing 546cm³ of air is heated from 0^oC to 10^oC. If the pressure is kept constant, what will be its volume at 10^oC?

A. 526cm³
B. 546cm³
C. 556cm[sup][/sup]
D. 566cm³
E. 819cm³

Question 39:

• WAEC 1995

Calculate the inductance L of the coil in the circuit shown below.

A. 14.4H
B. 3.8H
C. 0.6H
D. 0.4H
E. 0.2H

Question 40:

• WAEC 1995

Calculate the electric potential at a distance of 20.0cm from a point charge of 0.015C placed in air of permittivity (Take 1/4πε_o as 9.0 x 10⁹ Nm²C²)

A. 3.40x10⁶V
B. 6.75x10⁵V
C. 6.75x10¹²V
D. 3.40x10⁵V
E. 8.30 x 10²V