Q. The sunlight from the sun to the earth reaches in -
1) 5 minutes
2) 6 minutes
3) 8 minutes
4) 10 minutes
Q. The unit of pressure is -
1) kg/ cm2
2) kg/ cm
3) kg/ mm
4) None of the above/ More than one of the above
Q. An ammeter has ........... resistance, so that it passes maximum current through it.
1) Infinite
2) Very less
3) Very high
4) High
Q. Which of the following is equal to Hertz?
1) s-1
2) m s-2
3) s
4) m / s
Q. Sodium metal is stored in -
1) Kerosene
2) Ether
3) Water
4) Acetone
Q. The process of movement of molecules from a higher concentration place to a lower concentration places is known as :
1) Condensation
2) Evaporation
3) Diffusion
4) Sublimation
Q. K-shell is the .......... energy level.
1) Third
2) Fourth
3) First
4) Second
Q. In some machines, why is using oil as a lubricant not advisable?
1) Oil makes the movement of the parts tough
2) Sometime oil leaks into the parts of the machine causing undesirable obstruction of working
3) Oil sometimes increases friction
4) Oil makes die machine parts and the whole place dirty
Q. The acceleration experienced by an object during a free fall is independent of its -
1) Velocity
2) Pressure
3) Mass
4) Energy
Q. What is the minimum temperature to which a fuel must be heated so that it may catch fire and start burning?
1) Normal temperature
2) Neutral temperature
3) Boiling temperature
4) Ignition temperature
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