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Physics

Physics
The weight of a body acts through the centre of

Mass
Buoyancy
Gravity
Both (A) and (B)

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Physics
Acceleration is the rate of change of

Speed
Jerk
Velocity
Jounce

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Physics
The base of an electric iron is brightly polished mainly

To make it more durable
To make it rust-proof
To reduce heat loss by radiation
To make it smooth and frictionless

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Physics
What is the SI unit of Force?

Pascal
Newton
Watt
Boyle

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Physics
Which type of mirror is used in the head lights of vehicles ?

Parabolic mirror
Concave mirror
Convex mirror
Plane mirror

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Physics
A copper wire of radius r and length l has a resistance of R. A second copper wire with radius 2r and length l is taken and the two wires are joined in a parallel combination. The resultant resistance of the parallel combination of the two wires will be

5 R
R/5
4 R/5
5 R/4

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