Moving Charges ...

An electron whose e/m is 1.76 × 10¹¹C/kg enter a region where there is a uniform magnetic field of induction 2 × 10^-3 tesla with a velocity of 3 × 10⁶ m/sec in a direction making an angle of 45^o with the field. The pitch of its helical path in the region is

A candidate connects a moving coil voltmeter V and moving coil ammeter A and resistor R as shown in Fig ?

The magnetic field at the centre of a loop of a circular wire of radius r carrying current I may be taken as B₀ .If a particle of charge q moving with speed v passes the centre of semicircular wire, as shown in Fig. along the axis of the wire, the force on it due to the current is

Three infinitely long conductors A, B and C carrying currents as shown in the fig. the position of the point lying on the straight line AC where the magnetic field is zero is between

What is the magnetic field induction at the centre O of the arc in the Fig.?

A conductor AB of length L carrying a current I₂, is placed perpendicular to a long straight conductor XY carrying current I₁, as shown in Fig. the force on AB is magnitude is

A charge +q is moving along positive x – direction From origin it follows trajectory (non circular) as shown in Fig. The electric and magnetic fields existing in the region to the right of y – axis may be

A length L of wire carries a steady current I. It is bent first to form a circular plane coil of one turn. The same length is now bent more sharply to give a double loop of smaller radius. The magnetic field at the centre caused by the same current is

If a copper rod carries a direct current, the magnetic field associated with the current will be