1. What is the unit of work.....
Joules
2. A man will exact the greatest pressure on a bench when he lies flat on his back
3. The working principle of a washing machine is...
centrifugation
4. The base of an electric iron is brightly polished mainly.....
to reduce heat loss by radiation
5. Ball bearings are used in cycles, scooters etc to
Reduce the friction between the wheel and the axle
6. Total internal reflection can take place when light travels from
Diamond to glass
7. If a carrier wave of 1000 kHz is used to carry the signal, the length of transmitting antenna will be equal to _____ ?
300 m
8. The information of brilliant colors in a thin soap film is a consequence of the phenomena of
Multiple reflection and interference
9. Reading of a barometer going down is an indication of
Rainfall
10. One astronomical unit is the average distance between
Earth and the Sun
11. The image of an object formed on the retina of the eye is
Real and inverted
12. Energy is continuously generated in the sun due to
Nuclear fusion
13. Which Color has the Longest Wavelength?
Red
14. Erg cross Sec is the unit of
Planck s constant
15. photosynthesis takes place faster in white light
Light from the sun reaches us in nearly...
8 min
16. Blotting paper absorbs ink due to
Capillary action phenomenon
17. Which liquid is the most viscous
Oil
18. Formation of shadows can be explained by rectilinear propagation of light
19. In a freezer ice cubes will be formed more quickly in trays made of...
aluminium
20. The direction of heat flow between two objects depends on
Their temperatures
21. The purpose of choke in tube light is
Induce high voltage
22. The direction of heat flow between two objects depends on
Their temperatures
23. What is the full form of
Radio Detecting and Ranging
24. Which of the following is a scalar quantity electric current
25. The Capacity of a Communication Channel is Measured in.....
Band width
26. Which of the following is the fastest communication channel?
Microwave
27. Which is the point from where an azimuth originates?
North
28. When light enters from air to water, then its
frequency is same but wavelength is smaller in water than in air
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