Q. The most commonly used semi-conductive material is -
1) Germanium
2) Silicon
3) Carbon
4) Sulphur
Q. What should be the characteristics of an electric-fuse wire?
1) High melting point, high specific resistance
2) Low melting point, low specific resistance
3) High melting point, low specific resistance
4) Low melting point, high specific resistance
Q. Very High Frequency (VHF) has -
1) shorter wavelengths
2) shortest wavelengths
3) longer wavelengths
4) longest wavelengths
Q. A device that converts chemical energy into electrical energy is called -
1) motor
2) generator
3) battery
4) moving-coil meter
Q. An elastic wave generated by an impulse such as an earthquake or an explosion is called -
1) sound wave
2) epicentre
3) tectonic shift
4) seismic wave
Q. With what do you divide thrust in a liquid to obtain the value of pressure?
1) Area
2) Density
3) Mass
4) Volume
Q. The alloy of steel that is used for making automobile parts such as axle, ball bearing, etc. is -
1) Nickel steel
2) Chromium steel
3) Tungsten steel
4) Stainless steel
Q. Non-metallic mineral is -
1) Marble
2) Manganese
3) Silver
4) Lead
Q. A man weighing 65 kg jumps from a 100 ft high building with a load of 35 kg What will be the load experienced by him?
1) 20 kg
2) 100 kg
3) 200 kg
4) Zero
Q. In the visible spectrum, the colour having the shortest wavelength is -
1) Green
2) Red
3) Violet
4) Blue
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