- ARetentivity.
- BCoercivity.
- CEnergy loss.
- DHysterisis.
Explanation:
Coercivity is the magnetic force required to demagnetise the material.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
The electrochemical equivalent Z of any element can be obtained by multiplying the electrochemical equivalent of hydrogen with
|
(a) Atomic weight |
(b) Molecular weight |
(c) Chemical equivalent |
(d) A constant |
Two lines of force due to a bar magnet
|
(a) Intersect at the neutral point |
|
(b) Intersect near the poles of the magnet |
|
(c) Intersect on the equatorial axis of the magnet |
|
(d) Do not intersect at all |
Consider an optical communication system operating at l~ 800 nm. Suppose, only 1% of the optical source frequency is the available channel bandwidth for optical communication. How many channels can be accommodated for transmitting audio signals requiring a bandwidth of 8 kHz
|
(a) 4.8 × 108 |
(b) 48 |
(c) 6.2 × 108 |
(d) 4.8 × 105 |
In an isolated parallel plate capacitor of capacitance C, the four surface have charges and
as shown. The potential difference between the plates is
|
(a) |
(b) |
(c) |
(d) |