The wire having red plastic covering is
Live wire
neutral wire
Earth wire
None
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 region around a magnet within which it can experience a magnetic force is called
Magnetic field
Magnetic pole
Magnet induction
Magnetic attraction
The depletion layer in the PN junction region is caused by
Drift of holes
Diffusion charge carriers
Migration of impurity atoms
Drift of electrons
An electric generator actually act as a
Source of electric charge
Source of heat energy
Electromagnet
Converter of energy
Which of the following domestic appliance uses an electric motor?
Electric fan
Milk cooker
Pressure cooker
Cooking gas
The safety device to protect an electric circuit from overloading or short circuiting is
Earthing
Electric fuse
Magnetic induction
Electrolysis
The system where due to action of an electromagnet, a circuit is activated to control a second circuit is
Electromagnetic relay
Remote control
Radar
Electric bell
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
