Air is thrown on the sail of a stationary boat by an electric fan kept on it. The boat will

Electric fan works on the principle of

Give the magnitude and direction of the net force acting on a stone of mass 0.1kg:- just after it is dropped from the window of a stationary train, Neglect air resistance throughout.

In a mass spectrometer used for measuring the masses of ions, the ions are initially accelerated by an electric potential V and then made to describe semicircular path of radius R using a magnetic field B. If V and B arc kept constant the ratio (("charge on the ion")/("mass of the ion")) will be proportional to

What is the role of the two conducting stationary brushes in a simple electric motor?

A 50 kg man is standing on a flat boat at rest in a river.He moves 5 m to north and halts.If the boat has a mass of 450 kg,then the boat will moves through a distance :

A boat goes 30 km upstream and 44 km downstream in 10 hours. In 13 hours, it can go 40 km upstream and 55 km downstream. Find the speed of the stream and that of the boat in still water.

The self indcutance of the motor of an electric fan is 10 H. In order to impart maximum power at 50 hz, it should be connected to a capacitance of

A motorboat goes upstream on a river and covers the distance between two towns on the riverbank in six hours. It covers this distance downstream in five hours. If the speed of the stream is 2 km/h, find the speed of the boat in still water.

A boat goes 25 km upstream and 33 km downstream in 8 hours. It can also go 40 km upstream and 77 km downstream in 15 hours. Find the speed of the stream and that of the boat in still water.