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 Physics Questions

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Q:

What is the process of conversion of solid state directly to gaseous state called?

A) Evaporation B) Condensation
C) Sublimation D) Distillation
 
Answer & Explanation Answer: C) Sublimation

Explanation:
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Q:

Which of the following describes an electric motor?

A) Is found in many appliances with moving parts, like a vacuum cleaner or a blender. B) Changes electric energy to mechanical energy.
C) Uses the interaction between a spinning coil of wire and magnet. D) Can be powered by a hand crank.
 
Answer & Explanation Answer: B) Changes electric energy to mechanical energy.

Explanation:

An electric motor is an electrical machine that converts electrical energy into mechanical energy.

                                   Which_of_the_following_describes_an_electric_motor1596165769.jpg image

Most electric motors operate through the interaction between the motor's magnetic field and electric current in a wire winding to generate force in the form of torque applied on the motor's shaft. 

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Q:

At what distance from the earth is gravity zero

Answer

Gravitational force is the force that binds everything at the surface of the earth. It holds at what distance from the earth is gravity zero. 

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Q:

 Find the work done (in J) when a charge of 10 C moves across a potential difference of 2 V.

A) 20 B) 5
C) 40 D) 10
 
Answer & Explanation Answer: A) 20

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Q:

Rate of change of momentum is

A) Area B) Pressure
C) Force D) Velocity
 
Answer & Explanation Answer: C) Force

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Q:

If the Distance-Time graph is a straight inclined line then it represents _______________.

A) uniform speed B) non-uniform speed
C) constant displacement   D) non-uniform velocity
 
Answer & Explanation Answer: A) uniform speed

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Q:

The SI unit of resistance is:

A) Newton B) Coulomb
C) Ohm D) Joule
 
Answer & Explanation Answer: C) Ohm

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Q:

What is the SI unit of Torque?

A) newton/meter B) newton meter
C) newton second D) newton/meter squared
 
Answer & Explanation Answer: B) newton meter

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