IIT-JEE Exam

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.

Read Solution (Total 0)

IIT-JEE Other Question

Let f be a real–valued differentiable function on R (the set of all real numbers) such that f(1) = 1. If the y–
intercept of the tangent at any point P(x, y) on the curve y = f(x) is equal to the cube of the abscissa of P,
then the value of f(–3) is equal to 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