Moving Charges ...

Same current i = 2A is flowing in a wire frame as shown in figure. The frame is a combination of two equilateral triangles ACD and CDE of side 1 m. It is placed in uniform magnetic field B = 4T acting perpendicular to the plane of frame. The magnitude of magnetic force acting on the frame is

A uniform conducting wire ABC has a mass of 10 g. A current of 2 A flows through it. The wire is kept in a uniform magnetic field B = 2T. The acceleration of the wire will be

In the given figure net magnetic field O will be

In the following figure a wire bent in the form of a regular polygon of n sides is inscribed in a circle of radius a. Net magnetic field at centre will be

A proton accelerated by a potential difference 500 KV moves though a transverse magnetic field of 0.51 T as shown in figure. The angle θ through which the proton deviates form the initial direction of its motion is

AB and CD are long straight conductors, distance d apart, carrying a current I. The magnetic field at the midpoint of BC is

The unit vectors i ̂,j ̂and k ̂are as shown below. What will be the magnetic field at Oin the following figure

A circular coil of 5 turns and of 10 cm mean diameter is connected to a voltage source. If the resistance of the coil is 10 Ω, the voltage of the source so as to nullify the horizontal component of earth\'s magnetic field of 30 A turn m^–1 at the centre of the coil should be