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प्रश्न
An electron moves on a straight-line path XY as shown in the figure. The coil abcd is adjacent to the path of the electron. What will be the direction of the current, if any, induced in the coil?
विकल्प
The current will reverse its direction as the electron goes past the coil
No current will be induced
abcd
adcb
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उत्तर
The current will reverse its direction as the electron goes past the coil
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संबंधित प्रश्न
Calculate the dimensions of (a) \[\int \overrightarrow{E} . d \overrightarrow{l,}\] (b) vBl and (c) \[\frac{d \Phi_B}{dt}.\] The symbols have their usual meaning.
Fig. shows a simple form of an A.C. generator.
(a) Name the parts labeled A and B.
(b) What would be the effect of doubling the number of turns on the coil if the speed of rotation remains unchanged?
(c) Which of the output terminals is positive if the coil is rotating in the
direction shown in the diagram (anticlockwise)?
( d ) What is the position of the rotating coil when p.d. across its ends is zero? Explain why p.d. is zero when the coil is at this position .
(e) Sketch a graph showing how the p.d. across the ends of the rotating coil varies with time for an A.C. dynamo.
( f) On th e same sheet of paper and vertically below the first graph using the same time scale, sketch graphs to show the effect of
(i) Doubling the speed of rotation and at the same time keeping
the field and the number of turns constant,
(ii ) Doubling the number of turns on the coil and at the same time
doubling the speed of rotation of the coil, keeping th e speed
constant.
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Write the two names in the following diagram.
Right hand thumb rule.
Establish the fact that the relative motion between the coil and the magnet induces an emf in the coil of a closed circuit.
Show that Lenz’s law is in accordance with the law of conservation of energy.
A galvanometer is an instrument that can detect the presence of a current in a circuit.
Which type of force is experienced by a moving charge in a magnetic field?
