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प्रश्न
A flat coil of wire rotates at a constant speed about an axis perpendicular to a uniform magnetic field. Draw a graph to show how the induced e.m.f. varies relative to the positions of the coil during its one complete rotation. At what position of the coil, the e.m.f. has the maximum value?
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उत्तर
Figure below shows the variation in induced e.m.f. relative to various positions of coil, during its one complete rotation.
The e.m.f. is maximum when the coil is with its plane parallel to the magnetic field.
V = Coil vertical
H = Coil Horizontal
संबंधित प्रश्न
A rectangular coil of copper wires is rotated in a magnetic field. The direction of the induced current changes once in each______.
What type of generator is used at Power Stations?
Each one of the following changes will increase emf (or voltage) in a simple generator except:
(a) increasing the number of turns in the armature coil
(b) winding the coil on a soft iron armature
(c) increasing the size of the gap in which the armature turns
(d) increasing the speed of rotation
A d.c. generator is based on the principle of:
(a) electrochemical induction
(b) electromagnetic induction
(c) magnetic effect of current
(d) heating effect of current
What determines the frequency of a.c. produced in a generator?
Explain the construction and working of the following. Draw a neat diagram and label it.
Electric Generator (AC)
Draw a neat labeled diagram of an A.C. generator
An a.c. generator changes the ______energy to ______ energy.
Draw a neat diagram of an AC generator and explain its working.
To convert an AC generator into DC generator ____________.
