Physics Questions

Q:

What is the effective resistance (in Ω) of two resistors 20 Ω and 30 Ω connected in parallel?

A) 50 B) 12
C) 24 D) 36
 
Answer & Explanation Answer: B) 12

Explanation:
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0 1939
Q:

Electrical Energy is the energy of

A) Protons B) Neutrons
C) Electrons D) All the above
 
Answer & Explanation Answer: C) Electrons

Explanation:

We know that Kinetic energy is the energy of a moving object and in the same way Electrical energy is the form of kinetic energy caused by moving electric charges called electrons.

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1 1938
Q:

If a body is moving on a circular path, what is its average velocity if it completes one cycle in one second?

A) Average velocity depends upon time taken to complete one cycle B) One
C) Average velocity is same as average speed D) Zero
 
Answer & Explanation Answer: D) Zero

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0 1936
Q:

Which of the following is not a unit of energy?

A) Calorie B) Joule
C) electron volt D) Watt
 
Answer & Explanation Answer: D) Watt

Explanation:

The watt(symbol: W) is a unit of power. In the International System of Units (SI) it is defined as a derived unit of 1 joule per second, and is used to quantify the rate of energy transfer. In dimensional analysis it is described by

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0 1934
Q:

A body in motion essentially acquires

A) Kinetic energy B) Potential energy
C) Mechanical energy D) Heat energy
 
Answer & Explanation Answer: A) Kinetic energy

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2 1931
Q:

An object is in static equilibrium when it is _______.

A) at rest B) moving in a circular path
C) moving with uniform velocity D) accelerating at high speed
 
Answer & Explanation Answer: A) at rest

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1 1929
Q:

Washing machines and microwave oven are operated by _______________ embedded inside these gadgets.

A) Satellites B) Electronic Device
C) e-books D) Internet
 
Answer & Explanation Answer: B) Electronic Device

Explanation:
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6 1929
Q:

The antiparticle of an electron is

A) Positron B) Proton
C) Alpha particles D) Beta particles
 
Answer & Explanation Answer: A) Positron

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4 1926