

Exmplanation:

Since i $\propto\tan \theta,$ the only graph that represents this correlation is curve c.
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Choke coil works on the principle of
|
(a) Transient current |
(b) Self induction |
(c) Mutual induction |
(d) Wattless current |
A region surrounding a stationary electric dipoles has
|
(a) Magnetic field only |
(b) Electric field only |
|
(c) Both electric and magnetic fields |
(d) No electric and magnetic fields |
A group of bright and faint stars is called
|
(a) Galaxy |
(b) Comet |
(c) Black hole |
(d) Constellation |
A solenoid of length l metre has self-inductance L henry. If number of turns are doubled, its self inductance
|
(a) Remains same |
(b) Becomes 2L henry |
|
(c) Becomes 4L henry |
(d) Becomes |
The electric potential V at any point O (x, y, z all in metres) in space is given by
. The electric field at the point (1m,0, 2m) in volt/metre is
|
(a) 8 along negative X - axis |
(b) 8 along positive X - axis |
|
(c) 16 along negative X - axis |
(d) 16 along positive Z - axis |