Questions in Moving Charges and Magnetism

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	An electron moves in a circular orbit with a uniform speed v. It produces a magnetic field B at the centre of the circle. The radius of the circle is proportional to
	An electric field of 1500 V / m and a magnetic field of $0.40 weber / meter^2$ act on a moving electron. The minimum uniform speed along a straight line the electron could have is
	An electron (mass = $9.1 \times {10^{ - 31}}$ kg; charge = $1.6 \times {10^{ - 19}}$C) experiences no deflection if subjected to an electric field of $3.2 \times {10^5}$V/m, and a magnetic fields of $2.0 \times {10^{ - 3}}$ Wb/m2. Both the fields are normal to the path of electron and to each other. If the electric field is removed, then the electron will revolve in an orbit of radius
	An electron, moving in a uniform magnetic field of induction of intensity $\vec B,$ has its radius directly proportional to
	Two free parallel wires carrying currents in opposite direction
	A rectangular loop carrying a current i is situated near a long straight wire such that the wire is parallel to the one of the sides of the loop and is in the plane of the loop. If a steady current I is established in wire as shown in figure, the loop will
	A circular coil of radius 4 cm and of 20 turns carries a current of 3 amperes. It is placed in a magnetic field of intensity of 0.5 $weber/{m^2}$. The magnetic dipole moment of the coil is
	A conducting circular loop of radius r carries a constant current i. It is placed in a uniform magnetic field $\overrightarrow B $, such that $\overrightarrow B $ is perpendicular to the plane of the loop. The magnetic force acting on the loop is
	Two thin long parallel wires separated by a distance b are carrying a current iamp each. The magnitude of the force per unit length exerted by one wire on the other is
	Through two parallel wires A and B, 10 and 2 ampere of currents are passed respectively in opposite direction. If the wire A is infinitely long and the length of the wire B is 2 m, the force on the conductor B, which is situated at 10 cm distance from A will be

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