Test Sample Welcome to your Physics 1. The stress experienced by a wire of diameter $\frac{\text{y}}{\pi}$m loaded by a weight $y^2$N is Deselect Answer \piNm^{-2} 2\piNm^{-2} 4\piNm^{-2} 8\piNm^{-2} None 2. Under which conditions is work done Deselect Answer A man supports a heavy load on his head with hands. A woman holds a pot of water A boy climbs onto a table A man pushes against a stationary petrol tanker None 3. Rainbow is formed when sunlight undergoes Deselect Answer reflection refraction dispersion diffraction None 4. Find the value of a capacitor with voltage 5V and 30C. Deselect Answer 7f 6f 15f 0.17f None 5. When a bus is accelerating, it must be Deselect Answer changing its speed changing its velocity changing its position changing its direction None 6. The friction due to air mass can be reduced by Deselect Answer streaming lubricating propeller polishing None 7. Which of the following operates based on magnetic effect of electric current? Deselect Answer electric heater photocell Dynamo Cold cathode None 8. When a charged ebonite rod is brought near a charged glass rod, there will be Deselect Answer attraction repulsion spark no force experienced None 9. Pilots uses aneroid barometer to know the height above sea level because Deselect Answer Very accurate Small and convenient Heavy and huge Costly None 10. A light ray passing from air into water at an angle of 30º from the normal in air would Deselect Answer make an angle greater than 30^0 in water surface be completely absorbed by the water surface be completely reflected by the water surface make an angle less than 30^0 from the normal in water None 11. A solid cube of aluminum is 1.5cm on each edge. The density of aluminum is $2700kgm^{-1}$. Find the mass of the cube. Deselect Answer 7.5g 9.1g 12.0g 15.0g None 12. 5 X $10^{-3}$kg of liquid at its boiling point is evaporated in 20s by the heat generated by a resistor of $2\Omega$ when a current of 10A is used. The specific latent heat of vaporization of the liquid is Deselect Answer 8.0 x $10^4Jkg^{-1}$ 8.0 x $10^5Jkg^{-1}$ 8.0 x $10^6Jkg^{-1}$ 8.0 x $10^7Jkg^{-1}$ None 13. If the S.V.P of water vapour was 13.5mmHg at 33ºC and 7.3mmHg at 7ºC. Find the percentage relative of the air on a day when average air temperature was 33ºC and dew point was 7ºC. Deselect Answer 55% 60% 54% 51% None 14. Electrolysis can be investigated using Deselect Answer Voltmeter Ammeter Galvanometer Voltameter None 15. wheelbarrow inclined at 60º to the horizontal is pushed with a force of 150N. What is the horizontal component of the applied force Deselect Answer 130N 75N 60N 50N None 16. In a solar panel, solar beam is concentrated by using Deselect Answer Concave mirror Convex mirror Plane mirror Triangular mirror None 17. A rectifier is a device that changes Deselect Answer D.C to D.C D.C to A.C A.C to A.C A.C to D.C None 18. The dimension of young's modulus,E is given by Deselect Answer $MLT^{-1}$ $MT^{-2}$ $ML^{-1}T^{-2}$ $M^{-1}$T None 19. The moon's acceleration due to gravity is $\frac{1}{6}$ of the earth's value. The weight of a bowling ball on the moon would be Deselect Answer 6 times its weight on the earth $\frac{1}{6}$ of its weight on the earth 36 times its weight on the earth equal to its weight on the earth None 20. If a sheet of an insulating material is inserted between the plates of an air capacitor, the capacitance will Deselect Answer become zero decrease increase remain unchanged None
