The materials which are attracted by magnets are called
Ferromagnetic
Paramagnetic
Bar magnets
Electromagnets
Which of the following is used to measure the current in a circuit ?
Galvanometer
Ammeter
Voltmeter
Rheostat
Direction of induced current is given by
Fleming’s left hand rule
Fleming’s right hand rule
Lenz’s law
Newton’s law
When a low resistance wire is connected in parallel to the coil of galvanometer, it works as
Electromagnet
Generator
Which of the following is used to increase a.c potential?
A.C generator
D.C generator
Step-up transformer
Step-down transformers
What material is use for making the armature of an electric bell?
Soft iron
Silver
An alloy of iron and steel
Copper
The speed of the motor can be increased by increasing
Magnetic strength
Current
Number of turns in the coil
All the above
The strength of an electromagnet increases if
The current in the coil increases
The number of turns in the coil increases
the poles are moved close together
Which of the following galvanometer has very high sensitivity?
Pivoted type galvanometer
Suspended type galvanometer
Moving coil galvanometer
Which of the following is used to decrease a.c potential?
Step-down transformer
