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When ever the flux linked with a coil changes, then
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Practice questions from similar books
Question 1
Show a conductin loop placed near a long, straight wire carrying I as shown. If the current increases continuously, find the direction of the induced current in the loop. Question 2
Space is divided by the line AD into two regions. Region I is field free and the Region II has a unifrom magnetic field B direction into the plane of the paper. ACD is a simicircular conducting loop of radius r with center at O, hte plane of the loop being in the plane of the paper. The loop is now made to rotate with a constant angular velocity about an axis passing through O and the perpendicular to the plane of the paper. The effective resistance of the loop is R. (i) obtain an expression for hte magnitude of the induced cureent in the loop.
(ii) Show the direction of the current when the loop is entering into the Rigion II.
Plot a graph between the induced e.m.f and the time of roation for two periods or rotation.
Question 3
A coil of inductance 0.50 H and resistance is connected to a 240 V, 50 Hz ac supply.
(a) What is the maximum current in the coil?
(b) What is the time lag between the voltage maximum and the current maximum?
Hence, explain the statement that at very high frequency, an inductor in a circuit nearly amounts to an open circuit. How does an inductor behave in a dc circuit after the steady state?
Question 4
A circuit containing a two position switch S is shown in fig. (a) The switch S is in position '1'. Find the potential difference and the rate of production of joule heat in .
(b) If now the switch S is put in position 2 at t=0 find
(i) steady current in and
(ii) the time when current in is half the steady value.
Also calculate the energy stroed in the inductor L at that time.
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Question Text | When ever the flux linked with a coil changes, then |
Answer Type | Video solution: 1 |
Upvotes | 150 |