Magnetic Effects of Electric Current
Who discovered the magnetic effect of electric current?
The magnetic field inside a long straight solenoid-carrying current is:
Which of the following correctly describes the magnetic field near a long straight wire?
The direction of magnetic field produced by a current-carrying conductor is given by:
An electric generator converts:
An electric motor is a device that converts:
The phenomenon of electromagnetic induction is:
In India, the frequency of alternating current (AC) is:
The colour of the neutral wire in a standard domestic wiring system is:
At the time of short circuit, the current in the circuit:
The magnetic field lines inside a bar magnet move from:
Which rule is used to find the direction of force on a current-carrying conductor in a magnetic field?
Magnetic field lines can never intersect each other because:
What is the function of an earth wire in domestic electrical appliances?
The device used for producing electric current is called a:
Strength of the magnetic field inside a long current-carrying solenoid is:
What happens to a compass needle when brought near a current-carrying wire?
The split-ring in an electric motor acts as a:
The colour of the live wire in a standard domestic circuit is:
An electric fuse is a safety device based on which effect of electric current?
Which of the following correctly describes the magnetic field inside a long straight solenoid-carrying current?
The direction of the magnetic field around a current-carrying straight conductor is given by:
In a domestic electric circuit, the appliances are connected in parallel across the live and neutral wires because:
An electric generator works on the principle of: