The acceleration of a free fall due to gravity is not a constant everywhere on the Earth's surface because

Under which conditions is work done

Which of the following operates based on magnetic effect of electric current?

When a bus is accelerating, it must be

The friction due to air mass can be reduced by

The stress experienced by a wire of diameter yπ m loaded by a weight y2 N is

The mechanical advantage of the machine shown above

Find the value of a capacitor with voltage 5V and 30C.

Rainbow is formed when sunlight undergoes