(c) When a straight coil and a magnet are moved relative to each other, a current is induced in the coil. This phenomenon is known as electromagnetic induction.
(c) When a straight coil and a magnet are moved relative to each other, a current is induced in the coil. This phenomenon is known as electromagnetic induction.
(c) At the time of short circuit the current increase heavily, when two naked wires of an electric touch each other the amount of current that is flowing in the curcuit increase.
(c) At the time of short circuit the current increase heavily, when two naked wires of an electric touch each other the amount of current that is flowing in the curcuit increase.
(b) True A generator is a device that generates electricity by rotating a coil in a magnetic field. It works on the principle of electromagnetic induction.
(b) True
A generator is a device that generates electricity by rotating a coil in a magnetic field. It works on the principle of electromagnetic induction.
Which of the following correctly describes the magnetic field near a long straight wire?
(d) The magnetic field lines, produced around a straight current-carrying conductor, are concentric circles. Their centres lie on the wire.
(d) The magnetic field lines, produced around a straight current-carrying conductor, are concentric circles. Their centres lie on the wire.
See lessThe phenomenon of electromagnetic induction is
(c) When a straight coil and a magnet are moved relative to each other, a current is induced in the coil. This phenomenon is known as electromagnetic induction.
(c) When a straight coil and a magnet are moved relative to each other, a current is induced in the coil. This phenomenon is known as electromagnetic induction.
See lessThe device used for producing electric current is called a
(a) Generator is the device used to produce electric current.
(a) Generator is the device used to produce electric current.
See lessThe essential difference between an AC generator and a DC generator is that
(d) The main difference is an AC generator has two rings called slip rings. A DC generator has two half rings called commutator.
(d) The main difference is an AC generator has two rings called slip rings. A DC generator has two half rings called commutator.
See lessAt the time of short circuit, the current in the circuit
(c) At the time of short circuit the current increase heavily, when two naked wires of an electric touch each other the amount of current that is flowing in the curcuit increase.
(c) At the time of short circuit the current increase heavily, when two naked wires of an electric touch each other the amount of current that is flowing in the curcuit increase.
See lessState whether true or false A wire with a green insulation is usually the live wire of an electric supply.
(d) False Red insulation covers the live wire whereas green colour.
(d) False
Red insulation covers the live wire whereas green colour.
See lessState whether true or false The field at the centre of a long circular coil carrying current will be parallel straight lines.
(c) True A long circular coil is a long solenoid. The magnetic field lines inside the solenoid are parallel lines.
(c) True
A long circular coil is a long solenoid. The magnetic field lines inside the solenoid are parallel lines.
See lessState whether true or false An electric generator works on the principle of electromagnetic induction.
(b) True A generator is a device that generates electricity by rotating a coil in a magnetic field. It works on the principle of electromagnetic induction.
(b) True
A generator is a device that generates electricity by rotating a coil in a magnetic field. It works on the principle of electromagnetic induction.
See lessState whether true or false An electric motor converts mechanical energy into electrical energy.
(a) False As an electric motor converts electrical energy into mechanical energy.
(a) False
As an electric motor converts electrical energy into mechanical energy.
See lessList two methods of producing magnetic fields.
Three sources of magnetic fields are: a. Electromagnets b. Current-carrying conductors c. Permanent magnets
Three sources of magnetic fields are:
a. Electromagnets
b. Current-carrying conductors
c. Permanent magnets
See less