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Physics

Physics
The frequency of direct current is ________

60 HZ
100 HZ
Zero
50 HZ

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Physics
One Kilowatt hour is equal to -

3.8 Mega Joule
3.6 Mega Joule
3.2 Mega Joule
4.0 Mega Joule

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Physics
Lightning is caused due to

Electric discharge
Electric leak
Electric pressure
Electric power

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Physics
Which planet has the lowest density?

Earth
Jupiter
Neptune
Saturn

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Physics
Rolling friction is caused by ________

Power dissipation
Buoyancy
Gravity
Non-elastic effects

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Physics
A body is initially moving with a velocity of 5 m/s. It undergoes an acceleration of 2 m/s2 for 4 seconds. Find the displacement (in m) of this body in these 4 seconds.

8
72
4
36

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