When a high resistance wire is connected in series to the coil of galvanometer, it works as
Ammeter
Voltmeter
Electromagnet
Generator
Which of the following law states the law of conservation of energy?
Fleming’s left hand rule
Fleming’s right hand rule
Lenz’s law
All the above
The speed of the motor can be increased by increasing
Magnetic strength
Current
Number of turns in the coil
Name the law which helped you to find the direction of the magnetic field lines:
Maxwell’s screw law
Which one of the following is used to increase a.c potential?
A.c generator
D.c generator
Step-up transformer
Step-down transformers
Which of the following galvanometer has very high sensitivity?
Pivoted type galvanometer
Suspended type galvanometer
Moving coil galvanometer
All the above.
Removal of the property of magnetization is called
Magnetisation
Electromagnetic induction
Demagnetisation
Paramagnetism
What material is use for making the armature of an electric bell?
Soft iron
Silver
An alloy of iron and steel
Copper
Which of the following is used to increase or decrease the amplitude of alternating current?
Transformer
Electromagnets
Galvanometer
The materials which are attracted by magnets are called
Ferromagnets
Paramagnets
Bar magnets
