Physics Questions

Q:

What is the direction of torque?

A) Perpendicular to the direction of applied force B) Same as the direction of applied force
C) Opposite to the direction of applied force D) Parallel to the radius
 
Answer & Explanation Answer: A) Perpendicular to the direction of applied force

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Q:

The mass per unit volume is called

A) Force B) Work
C) Density D) Pressure
 
Answer & Explanation Answer: C) Density

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Q:

Which of the following can do more work?

A) A rotating wheel B) A moving bullet
C) A speeding stone D) A raised hammer
 
Answer & Explanation Answer: B) A moving bullet

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Q:

Calculate the work done by the force of gravity when a satellite moves in an orbit of radius 40,000 km around the earth.

A) 8,000 J B) 4,00,000 J
C) 0 J D) 4,000 J
 
Answer & Explanation Answer: C) 0 J

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Q:

What is the duration of the world’s shortest X–ray laser has been successfully created by the scientists?

 

A) 39 nanoseconds B) 43 attoseconds
C) 15 picoseconds D) 57 microseconds
 
Answer & Explanation Answer: B) 43 attoseconds

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Q:

A conductor having some appreciable resistance is called a

A) Resistor B) Insulator
C) Conductor D) Semi-conductor
 
Answer & Explanation Answer: A) Resistor

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Q:

When the car takes a bend, the force that pushes us to the outside of the curve is the

A) Centripetal Force B) Centrifugal Force
C) Frictional Force D) Tension Force
 
Answer & Explanation Answer: B) Centrifugal Force

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Q:

Two identical resistors, each of 10 ohm, are connected in parallel. This combination, in turn, is connected to a third resistor of 10 ohm. The equivalent resistance of the combination is ___.

A) 30 ohm B) 5 ohm
C) 15 ohm D) 10 ohm
 
Answer & Explanation Answer: C) 15 ohm

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