A listener can detect the instrument from which a note is being sounded because different instruments produce the same note with a different.

• A. frequencies
• B. pitches
• C. loudness
• D. overtones

The energy stored in a capacitor of capacitance 5?F is 40J. Calculate the voltage applied across its terminals? The energy stored in a capacitor of capacitance 5μF is 40J. Calculate the voltage applied across its terminals?

• A. 4000V
• B. 200V
• C. 16V
• D. 6V

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

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

• A. 3.40x10⁶V
• B. 6.75x10⁵V
• C. 6.75x10¹²V
• D. 3.40x10⁵V

Which of the following is a fundamental quantity?

• A. Heat capacity
• B. Electric current
• C. Torque
• D. Reactance

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

(a) Explain what is meant by acceleration of free fall due to gravity, g.

(b) State two reasons why g varies on the surface of the earth

(c) A stone is projected upwards at an angle of 30° to the horizontal from the top of a tower of height 100 m and it hits the ground at a point Q. If the initial velocity of projection is 100ms\(^{-1}\), calculate the

(i) maximum height of the stone above the ground;

(ii) time it takes to reach this height;

(iii) time of flight

(iv) horizontal distance from the foot of the tower to the point Q. (Neglect air resistance and take g as 10m\(^{-2}\))

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

• A. 14.4H
• B. 3.8H
• C. 0.6H
• D. 0.4H

Which of the following media allow(s) the transmission of sound wave through them? I. Air II. Liquid III. Solid.

• A. I only
• B. II only
• C. III only
• D. I, II and III.

A cell of e.m.f 1.5V and internal resistance 2.552 is connected in series with an ammeter resistance 0.50 and a load of resistance 7.00. Calculate the current in the circuit

• A. 0.15A
• B. 0.20A
• C. 2.1OA
• D. 3.00A