1.Which of the following has the highest ionizing power?
Diamond
Graphite
Butane
Fullerene
2.Which of the following is not an application of concave mirror?
Solar Cooker
Shaving mirror
Dentists
Rear View mirror
3.If power of a lens is -0.5 dioptre focal length and type of lens is
2 m, concave
2 m, convex
50 cm, concave
50 cm, covex
4.Why the wings of an aeroplane are shaped with lower surface being flat and the upper surface being curved
To reduce vibration
To make difference in pressure to life the plane vertically
To accommodate more passengers in the wing
To strengthen the wheels fitted in wings
5.In Ocean Thermal Energy Conversion Plants the vapour of which gas is used to run the tubine
Water
Ethanol
Ammonia
Benzene
6.An electric cell is a device
which converts electric energy into chemical energy
which converts tidal energy into electric energy
which converts chemical energy into electric energy
which converts electric energy into tidal enegy
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