- When a 240 V supply is connected across an electrical appliance a current of 200 mA flows in the circuit .What is the electrical power supplied to the appliance?
- 1.2 W
- 48W
- 48000W
- 120000W

- 450 g of water at 60
^{o}C is to be cooled to 35^{o}C by addition of cold water at 20^{o}C. How much cold water is to be added?- 0.169kg
- 0.270kg
- 0.281kg
- 0.75kg

- A constant force of 5N acts on abody and moves it through a distance of 20 metres in 10 seconds. Calculate its power
- 2.5W
- 10W
- 40W
- 100W

- An object 2 cm tall is placed 5 cm infront of a convex lens. A real image is produced 20 cm from the lens. Calculate the magnification of the lens.
- 4
- 2
- 0.5
- 0.25

- Which of the following forms mechanical energy?
- electrical energy and kinetic energy
- potential energy and nuclear energy
- nuclear energy and kinetic energy
- potential energy and kinetic energy

- A source produces waves which travel a distance of 140cm in 0.08 seconds. If the distance between successive crests is 20cm, Find the frequency of the source.
- 0.875Hz
- 8.750Hz
- 87.500Hz
- 8750Hz

- A student is holding a white paper with green printing on it. If she enters a room with red light she will see
- black printing on a red paper
- blue printing on red paper
- yellow printing on a red paper
- red printing on a white paper

- A metal cyclinder contains a liquid of density 1100kgm
^{-3}. The area of the base of the cyclinder is 0.005m^{2}and the height of the liquid is 5m. Calculate the force exerted by the liquid on the base of the cyclinder.- 27.5N
- 55N
- 220N
- 275N

- An engine exerts a force of 2000N at a speed of 15ms
^{-1}. Find the power developed by the engine in kilowatts?- 30000
- 3000
- 300
- 30

- A pump is rated at 400 Watts.How many kilograms of water can it raise in one hour through a height of 72m?
- 0.8kg
- 5.6kg
- 33.3kg
- 2000kg

- The amount of heat required to raise the temperature of 0.5kg of salt solution from -5
^{o}C to 15^{o}C is (specific heat capacity of salt solution is 4000Jkg^{-1}K^{-1})- 8000J
- 20000J
- 40000J
- 160000J

- When mercury is spilt on glass it forms small spherical droplets because its
- density is high
- surface tension makes its surface elastic
- molecules are small
- cohesive force is greater than adhesive force with glass

- A train travelling at a constant speed of 20ms
^{-1}over comes a resistive force of 8kN. The power of the train is:- (8X20)W
- (8X10X20)W
- (8X100X20)W
- (8X1000X20)W

- Pressure in a liquid is independent of the:
- density of the liquid
- depth below the surface of the liquid
- pressure exerted on the surface of the liquid
- cross sectional area and shape of the vessel containing the liquid

- The gradient of the velocity-time graph represents the:
- speed of the body
- velocity of the body
- acceleration of the body
- distance covered by the body

- The interval between the ice and steam points on the thermometer is 192mm. Find the temperature when the length of the mercury thread is 67.2mm from the ice point.
- 32.8
^{o}C - 35.0
^{o}C - 65.0
^{o}C - 67.2
^{o}C

- 32.8
- The brightness of a spot on a CRO screen is controlled by:
- X plates
- anode
- grid
- cathode

- Points on a stationary wave which are permanently at rest are called:
- crests
- troughs
- nodes
- antinodes

- The half life of a radioactive substance is 10 seconds. How long will it take a mass of 16 g of the substance to reduce to 2 g
- 40s
- 30s
- 20s
- 10s

- The maximum efficiency that can be obtained with four pulleys and a mechanical advantage of 3 is:
- 100%
- 75%
- 12%
- 1.33%