Are the magnetic field lines closed? Explain.
See fig. Q-2, magnetic lines are shown. What is the direction of the current flowing through the wire?
A bar magnet with the North Pole facing towards a coil moves as shown in fig. Q-3. What happens to the magnetic flux passing through the coil?
A coil is kept perpendicular to the page. At P, current flows into the page and at Q it comes out of the page as shown in figure Q-4. What is the direction of magnetic field due to the coil?
The direction of current in a coil is shown in fig.Q.5. What type of magnetic pole as formed at the face that has a flow of current as shown in fig.Q-5?
Why does the picture appear distorted when a bar magnet is brought close to the screen of a television? Explain
Symbol 'X' indicates the direction of the magnetic field into the page. A straight long wire carrying current along its length is kept perpendicular to the magnetic field. What is the magnitude of force experience by the wire? In what direction does it act?
Explain the working of an electric motor with a neat diagram
Derive Faraday's law of induction from law of conservation of energy.
The value of magnetic field induction which is uniform is 2T. What is the flux passing through a surface of area 1.5m2 perpendicular to the field?