If physics is your favourite subject, then you must know the answer to these questions.

Physics is a very interesting subject as we understand it properly then we could get answers to many questions which we had since childhood and are still kept unanswered. So let us look at some very interesting questions along with their brief answers.

1. Difference between rotary & circular motion?

In Circular motion the object moves in a circle i.e., the earth revolving around the sun.

The objects rotate around their axis in rotary motion, i.e., when we spin a top.

2. How is bell rings affected when used in A.C current in place of D.C current?

Say i.e., if we use ac current source instead of the DC battery then the core of the electromagnet would get magnetized but the polarity at its end would change and hence the attraction of armature does not depend on the polarity, the bell would still ring.

3. Define gravitational constants and what is their value?

It is a proportionality constant that is used in newton’s law of gravitation, the force of attraction between any two-unit masses separated by a unit distance is called gravitational constants

Its value is G = 6.67408 × 10^-11 N m² /Kg²

4. What is the value of ‘g’ at different points?

‘g’ is the acceleration due to gravity, which is experienced by a freely falling object due to the gravitational force of a massive body,

g=GM/R²(M=Mass of the massive body, R=Radius of the massive body) Mass of the Earth is 6 × 10²⁴Kg. The radius of Earth is 6.4 × 10⁶m

g earth=9.8, on g Venus = 8.83, g Jupiter =26

5. Define Load or Voltage?

It is the difference in electric potential between two points, or it is the work done in moving charge from one pole to another by using wire, its S.I unit is volt(v) = P/I Watt/Ampere

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