- Aan electric field.
- Ban induced emf.
- Ca magnetic field.
- Da magnetic dipole.
Explanation:
A charging electric field gives rise to a magnetic field.
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The new resistance of wire of R W, whose radius is reduced half, is
|
(a) 16 R |
(b) 3 R |
(c) 2R |
(d) R |
The maximum power drawn out of the cell from a source is given by (where r is internal resistance)
|
(a) |
(b) |
(c) |
(d) |
The capacity of a parallel plate condenser is 10μF without dielectric. Dielectric of constant 2 is used to fill half the distance between the plates, the new capacitance in μF is
|
(a) 10 |
(b) 20 |
(c) 15 |
(d) 13.33 |
A white screen illuminated by green and red light appears to be
|
(a) Green |
(b) Red |
(c) Yellow |
(d) White |
The magnetic flux linked with coil, in weber is given by the equation,
The induced emf in the coil in the fourth second is
|
(a) 10 V |
(b) 30 V |
(c) 45 V |
(d) 90 V |