Advertisements
Advertisements
प्रश्न
A rectangular, a square, a circular and an elliptical loop, all in the (x - y) plane, are moving out of a uniform magnetic field with a constant velocity `vecv = vhati`. The magnetic field is directed along the negative z-axis direction. The induced emf, during the passage of these loops, out of the field region, will not remain constant for ______.
विकल्प
any of the four loops
the circular and elliptical loops
the rectangular, circular and elliptical loops
only the elliptical loops
Advertisements
उत्तर
A rectangular, a square, a circular and an elliptical loop, all in the (x - y) plane, are moving out of a uniform magnetic field with a constant velocity `vecv = vhati`. The magnetic field is directed along the negative z-axis direction. The induced emf, during the passage of these loops, out of the field region, will not remain constant for the circular and elliptical loops.
APPEARS IN
संबंधित प्रश्न
When a bar magnet is pushed towards (or away) from the coil connected to a galvanometer, the pointer in the galvanometer deflects. Identify the phenomenon causing this deflection and write the factors on which the amount and direction of the deflection depends. State the laws describing this phenomenon.
What is an electromagnet? Describe the construction and working of an electromagnet with the help of a labelled diagram.
An induced current is produced when a magnet is moved into a coil. The magnitude of induced current does not depend on:
(a) the speed with which the magnet is moved
(b) the number of turns of the coil
(c) the resistivity of the wire of the coil
(d) the strength of the magnet
Name and state the law which determines the direction of induced current.
or
State Fleming’s right-hand rule.
A transformer has 400 turns in the primary winding and 10 turns in the secondary winding. The primary e.m.f. is 250 V and the primary current is 2.0 A. calculate:
(a) The secondary voltage,
(b) The secondary current, assuming 100% efficiency.
What is an electromagnet? What do you know about the simplest form of an electromagnet?
You have been provided with a solenoid AB.
(i) What is the polarity at end A?
(ii) Give one advantage of an electromagnet over a permanent magnet.
State Lenz’s law.
Establish the fact that the relative motion between the coil and the magnet induces an emf in the coil of a closed circuit.
Which type of force is experienced by a moving charge in a magnetic field?
