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Subjects
Science State Board
Class 9
Magnetism and electromagnetism
Textbook questions
1.
Choose the best answer
Exercise condition:
4
m.
1
.
Which of the following converts electrical energy into mechanical energy?
Generator
Motor
Switch
Battery
2
.
The part of the AC generator that passes the current from the armature coil to the external circuit is
slip rings
split rings
brushes
field magnet
3
.
Transformer works on
both AC and DC
DC only
AC only
AC nor effectively than DC
4
.
The unit of magnetic flux density is
weber/meter2
weber/meter
weber.meter2
Weber
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