Question

Select correct alternative (T- True, F- False):
Statement -1 : A man is standing on a circular platform which is free to rotate about a fixed vertical axis.If the man starts moving on the periphery of the platform, the COM of the system (man + platform), Starts moving w.r.t. ground.
Statement -2 : A charged particle is kept at rest in a uniform magnetic field. If now the magnetic field starts increasing with time, the particle may start moving.
Statement -3 : On charging a soap bubble, its radius increases because the excess pressure inside the bubble increases.

• A. FFF
• B. TFT
• C. TFF
• D. TTT

Answer 1

The correct option is D TTT

Statement 1: COM of system starts moving as the position of the man is changing.
Statement 2: Change in Magnetic field causes Electric field, hence particle will experience electric force.
Statement 3: If a bubble is charged, then electrical pressure due to charge acts in outwards direction on the bubble. Hence a soap bubble always expands on giving any kind of charge (positive or negative).