Choose correct statement about magnetic lines of force
Lines of force are not imaginary lines
Can not be mapped on paper
Do not intersect each other
Always intersect each other.
The maximum safe current allowed to flow through a fuse before it melts is
Fuse rating
Power rating
Electrostatic
None of these
The depletion layer in the PN junction region is caused by
Drift of holes
Diffusion charge carriers
Migration of impurity atoms
Drift of electrons
The regions of concentrated magnetic strength inside the magnet just near its ends are
Magnetic poles
Magnetic field
Magnetic Ends
Which of the following device reverses the direction of flow of current through a circuit ?
Commutator
Rheostat
Ammeter
Voltmeter
Commonly used safety fuse wire in made of
Copper
Pb
Ni
An alloy of tin & lead
The charged body at rest produces
Electric field
Neither A or B
Both A & B
The region around a magnet within which it can experience a magnetic force is called
Magnetic pole
Magnet induction
Magnetic attraction
The wire having a green plastic covering is a
Live wire
Neutral wire
Earth wire
None
Which of the following device converts mechanical energy into electrical energy?
Dynamo
Electric motor
Solenoid
