Advertisements
Advertisements
Question
State two factors on which the magnitude of an induced e.m.f. in the secondary coils of a transformer depends.
Advertisements
Solution
The magnitude of an induced e.m.f. in the secondary coil of a transformer depends on the following two factors:
- The ratio of the number of turns in the secondary coil to the number of turns in the primary coil.
- The magnitude of e.m.f. applied in the primary coil.
APPEARS IN
RELATED QUESTIONS
State two differences between an electromagnet and a permanent magnet.
State two factors on which the strength of induced e. m.f. depends.
Describe briefly one way of producing an induced current in a coil. State one factor that determines the magnitude of induced e.m.f.
A straight current-carrying conductor is kept in a magnetic field. It Experiences a force. State three factors on which the magnitude of force Experienced by the conductor depends. Under what condition will the conductor Experience no force?
State two advantages of an electromagnet over a bar magnet.
State the energy change that takes’place in a D. C. motor.
State the factors, on which depends the magnitude of the force acting on current carrying conductor, when it is kept in a magnetic field perpendicular to it.
Point out three differences between an electromagnet and a bar (or permanent) magnet.
(i) A straight wire conductor passes vertically through a piece of cardboard sprinkled with iron filings. Copy the diagram and show the setting of iron filings when a current is passed through the wire in the upward direction and the cardboard is tapped gently. Draw arrows to represent the direction of the magnetic field lines.
(ii) Name the law which helped you to find the direction of the magnetic field lines.
Which magnet will you use?
Iron is to be separated from trash.
