An element of nucleon number P and atomic number Q emits an alpha particle from its nucleus. The resultant numbers of the new element formed are respectively

• A. P - 4 and Q + 2
• B. P - 4 and Q - 2
• C. P + 2 and Q + 2
• D. P + 2 and Q - 2

What type of motion does the skin of a talking drum perform when its being struck with the drum stick?

• A. random
• B. rational
• C. vibratory
• D. translational

Which of the following apparatus will require the smallest fuse rating for its protection?

• A. 60W, 240V
• B. 60W, 40V
• C. 40W, 12V
• D. 40W, 5V

Define

(a) electrolysis;

(b) electrolyte;

(c) electrode.

A ray of light strikes a plane mirror at a glancing angle of 50°. Calculate the angle between the incident and reflected rays

• A. 20°
• B. 40°
• C. 50°
• D. 80°

A water fall is 420m high. Calculate the difference in temperature of the water between the top and bottom of the water fall. Neglect heat loses(g = 10.0m-2 specific heat capacity of water = 4.20 x 10\(^3\) JKg-1 K-1)

• A. 0.1^oC
• B. 1.0^oC
• C. 42^oC
• D. 100^oC

When the volume of a given mass of gas is halved and its temperature doubled, the pressure

• A. remains constant
• B. increases by a factor of 4
• C. increases by a factor of 3
• D. decreases by a factor of 4

A force F required to keep a 5 kg mass moving round a cycle of radius 3.5 m at a speed of 7 ms^-1. What is the speed, if the force is tripled?

• A) 4.0 m/s
• B) 6.6 m/s
• C) 12.1 m/s
• D) 21.0 m/s

Which of the following modes is the most economical method of transmitting electrical power over long distances?

• A. alternating current at low voltage and high current
• B. alternating current at high voltage and high current
• C. alternating current at high voltage and low current
• D. direct current at low voltage and high current

A shooter wants to fire a bullet in such a way that its horizontal range is equal to three times its maximum height. At the what angle should he fire the bullet to achieve this?

• A) 68^o
• B) 53^o
• C) 30^o
• D) 45^o