A free charged particle moves through a magnetic field. The particle may undergo a change in :
Cyclotron is a device to
Magnetic field lines :
At the time of short circuit, the current in the circuit
Whose magnetic field is like a magnetic field of a bar magnet ?
The two poles in a magnet have
For a current in a long straight solenoid N- and S-poles are created at the two ends. Among the following statements, the incorrect statement is
Commercial electric motors do not use
The strength of magnetic field inside a long current carrying straight solenoid is
To convert an AC generator into DC generator
Which of the following describes the common domestic power supplied in India?
When is the back emf of an electric motor the greatest?
Magnetic field inside a solenoid is
The device used for producing electric current is called a
Which of the following property of a proton can change while it moves freely in a magnetic field ?
As we move away from a current carrying conductor, the spacing between the magnetic lines of force
The core of electromagnet is
The most important safety method used for protecting home appliances from short circuiting or overloading is
Choose the incorrect statement
Inside the magnet the field lines run