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Physics

Physics
Period of oscillation of 3 cm microwaves in seconds is

0.001
1 × 1010
0.01
1 × 10–10

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Physics
In a particular system, the units of length, mass and time are chosen to be 10 cm, 10 g and 0.1 s respectively. The unit of force in this system will be equivalent to

0.1 N
10 N
100 N
1 N

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Physics
In a diesel engine the high temperature needed to ignite the fuel is achieved by

Compressing air in the cylinders
The battery
An electrical spark
Using heat from exhaust

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Physics
Which one of the following determines the sharpness of image in a camera ?

Size of the camera
The exposure time
The focal length of the lens
The aperture

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Physics
Lightning is caused due to

Electric pressure
Electric leak
Electric power
Electric discharge

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Physics
Of the following properties of a wave, the one that is independent of the other is its

frequency
amplitude
velocity
wavelength

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