Give the magnitude and direction of the net force acting on
a high - speed electorn in space far from all material objects, and magnetic fields.

Give the magnitude and direction of the net force acting on a cork of mass 10g floting on water

Give the magnitude and direction of the net force acting on a kite skillfully held stationary in the sky

Give the magnitude and direction of the net force acting on a rain drop of falling down with a constant speed.

Give the magnitude and direction of net force on a drop of rain falling down with a constant velocity.

Give the magnitude and direction of net force on a stone of mass 0.1kg just after it dropped from the window of a train accelerating at 1ms^-2 .

Calculate the magnitude of the force acting on an electron moving with a velocity of 3 xx 10^(7) ms^(-1) at right angles to a magnetic field of 10T.

Give the magnitude and direction of the net force on a stone of mass 0.1 kg, lying on the floor of train which is accelerating with 1ms^-2 ,the stone being at rest relative to the train.

A 100 turn closely wound circular cell of radius 10 cm carries a current of 3.2A (a) what is the field at the centre of the coil? (b) What is the magnetic moment of this coil? The coil is placed in a vertical plane and is free to rotate about a horizontal axis which coincides with its diameter. A uniform magnetic field 2 T in the horizontal direction exists such that initially the axis of the coil is in the direction of the field. The coil rotates through an angle of 90^(o) under the influence of the magnetic field (c) What are the magnitudes of the torques on the coil in the initial and final position? (d) What is the angular speed acquired by the coil when it has rotated by 90^(o) ? The moment of inertia of the coil is 0.1 kg m^(2) .

Forces acting on a particle have magnitude 5,3 and 1 unit and act in the direction of the vectors 6 hati + 2 hatj + 3 hatk , 3 hati , - 2 hatj + 6 hatk and 2 hati - 3 hatj - 6 hatk respectively. They remain constant while the particle is displaced from the point A (2, -1,-3) to B (5,-1,1) The work done is :