Advertisements
Advertisements
Question
State one factor that affects the magnitude of induced current in an AC generator.
Advertisements
Solution
Factors on which the magnitude of induced current in an AC circuit depends:
- Magnetic field intensity.
- Number of turns in the coil.
APPEARS IN
RELATED QUESTIONS
A rectangular coil of copper wires is rotated in a magnetic field. The direction of the induced current changes once in each______.
Name the device which converts mechanical energy into electric energy.
Name the phenomenon which is made use of in an electric generator.
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
State whether the following statement are true of false:
A wire with a green insulation is usually the live wire.
Draw a labelled diagram of a simple a.c. generator.
An a.c. generator changes the ______energy to ______ energy.
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?
Draw and label the diagram of an AC generator.
