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qUESTIONS

A light bulb is rated 100W for 220 V AC supply of 50 Hz. Calculate (a) resistance of the bulb. (b) the rms current through the bulb.

A 15.0 uF capacitor is connected to a 220 V, 50 Hz source. Find the capacitive reactance and the current (rms and peak) in the circuit. If the frequency is doubled, what will happen to the capacitive reactance and the current.

An AC circuit consists of only an inductor of inductance 2 H. If the current is represented by a sine wave of amplitude 0.25 A and frequency 60 Hz, calculate the effective potential difference across the inductor (π = 3.142)

If the effective current in a 50 cycle AC circuit is 5 A, what is the peak value of current? What is the current 1/600 sec. after it was zero ?

Textbook-Solutions-12th-MH

The region inside a current carrying torrid winding is filled with aluminium having susceptibility χ=2.3 x 10-5. what is the percentage increase in the magnetic field in the presence of aluminium over that without it?

Textbook-Solutions-12th-MH

Calculate the gyromagnetic ratio of electron (given e=1.6×10-19 C, mc=9.1×10-31 kg)

MCQs-PYQs-12th-jee

Energy in a current carrying conductor is stored in the form of

A toroidal ring, made from a bar of length (l) 1 m and diameter (d) 1 cm, is bent into a circle. It is wound tightly with 100 turns per cm. If the permeability of bar is equal to that of free space (Uo), calculate the magnetic field inside the bar (B) when the current (i) circulating through the turns is 100 A. Also determine the self-inductance (L) of the coil.

The primary and secondary coil of a transformer each have an inductance of 200 ×10-6 H. The mutual inductance (M) between the windings is 4×10-6 H. What percentage of the flux from one coil reaches the other?

A uniform magnetic field B(t), pointing upward fills a circular region of radius, s in horizontal plane. If B is changing with time, find the induced electric field.

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