Question

19 Which one of the following is not a conservative force ?
(1) Force of friction,
(2) Magnetic force,
(3) Gravitational force,
(4) Electrostatic force.​

Answer 1

Answer:

Magnetic force,,,,,,,,

Answer 2

Conservative force:-

A force with property that the total work done in moving a particle between two points is independent of the path taken is called as a conservative force.

It is a force which conserves the mechanical energy of a body.

Force of friction: It is a non-conservative force as the work done by frictional force not only depends on initial & final position but also on the length of path.

Magnetic force: It is a conservative force as it is a velocity dependent vector.

Gravitational force: It is conservative force as the amount of work depends upon the initial & final distance and not on the path taken.

Electric force: It is  conservative as it is path independent.

Hence, Option (1) is correct.

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