Question

Explain the working principle of a choke-coil. Explain the importance of watuess current in a chols
(UPB 2010
Describe the construction of choke-coil and show that the use of choke-coil in a.c.circuits minimi
the loss of energy enough
(UPB 2010
Discuss qualitatively L-C oscillations, and the condition of resonance in L-C circuit.
In an alternating current circuit L. Cand R are connected in series. Draw the diagram of this creat
Give the formula for the impedance and resonant frequency of the circuit.
(UPB 2016
6. What is meant by resonating circuit ? Write down the necessary condition for series resonating
circuit and the expression for frequency
(UPB 2010,08
17. Describe the construction and working of transformer
18. Draw a labelled diagram of transformer. Derive an expression for its transformation ratio.
(UPB 2011
Numericals
1. A coil of 50 turns has an area of 50 cm. It is rotating at an angular velocity of 10 rrad/s
uniform magnetic field of 0.6 weber/m. Calculate the maximum voltage induced in the coil.
Ans. 4711
2 A coil of radius 8.0 cm and having 20 turns rotates about its vertical diameter with an ans
speed of 50 radian per second in a uniform horizontal magnetic field of 0.003 Wb/m. What
maximum value of the voltage induced in the coil ? What is the average value of alternating cu
for a complete rotation ?
Ans. 0.06V.​

Answer 1

Sorry I can’t understand your question