IIT-JEE Exam

A thin flexible wire of length L is connected to two adjacent fixed
points and carries a current I in the clockwise direction, as shown in
the figure. When the system is put in a uniform magnetic field of
strength B going into the plane of the paper, the wire takes the shape
of a circle. The tension in the wire is

Read Solution (Total 0)

IIT-JEE Other Question

An AC voltage source of variable angular frequency ω and fixed amplitude V0 is connected in series with a
capacitance C and an electric bulb of resistance R (inductance zero). When ω is increased
(A) the bulb glows dimmer (B) the bulb glows brighter
(C) total impedance of the circuit is unchanged (D) total impedance of the circuit increases. A block of mass m is on an inclined plane of angle θ. The coefficient of
friction between the block and the plane is μ and tan θ > μ. The block is held
stationary by applying a force P parallel to the plane. The direction of force
pointing up the plane is taken to be positive. As P is varied from P1 = mg (sin
θ – μ cos θ) to P2 mg (sin θ + μ cos θ), the frictional force f is