Advertisements
Advertisements
Question
In which of the following devices, the eddy current is not used ______
Options
Electromagnet
Induction furnace
Electric heater
Magnetic breaking in train
Advertisements
Solution
In which of the following devices, the eddy current is not used Electric heater.
RELATED QUESTIONS
Give one example of use of eddy currents.
Describe briefly three main useful application of eddy currents ?
If the magnetic field outside a copper box is suddenly changed, what happens to the magnetic field inside the box? Such low-resistivity metals are used to form enclosures which shield objects inside them against varying magnetic fields.
How are eddy currents generated in a conductor which is subjected to a magnetic field?
Write two examples of their useful applications .
State applications of eddy currents.
How is Eddy current produced? How do they flow in a conductor?
The plane in which eddy currents are produced in a conductor is inclined to the plane of the magnetic field at an angle equal to ______.
Two simple pendula of length L and 4L are pulled aside to the right and are at rest so that they make an angle 30° with the vertical. They are then released simultaneously at time t = 0. The time after which they will be in phase is ______.
If the length of a simple pendulum increases by 5%, then its period shall increase by ______.
For high frequency, capacity offers
Which one is not an application of eddy current?
Eddy currents are also known as ______
A metal plate is getting heated. It can be because ______.
- a direct current is passing through the plate.
- it is placed in a time varying magnetic field.
- it is placed in a space varying magnetic field, but does not vary with time.
- a current (either direct or alternating) is passing through the plate.
Consider a metallic pipe with an inner radius of 1 cm. If a cylindrical bar magnet of radius 0.8 cm is dropped through the pipe, it takes more time to come down than it takes for a similar unmagnetised cylindrical iron bar dropped through the metallic pipe. Explain.
