When the current through a solenoid increases at a constant rate, the induced current
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(a) Is constant and is in the direction of the inducing current |
|
(b) Is a constant and is opposite to the direction of the inducing current |
|
(c) Increases with time and is in the direction of the inducing current |
|
(d) Increases with time and opposite to the direction of the inducing current |
(b) Is a constant and is opposite to the direction of the inducing current
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The combined capacity of the parallel combination of two capacitors is four times their combined capacity when connected in series. This means that
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(a) Their capacities are equal |
(b) Their capacities are 1 μF and 2 μF |
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(c) Their capacities are 0.5 μF and 1 μF |
(d) Their capacities are infinite |
If the direction of the initial velocity of the charged particle is neither along nor perpendicular to that of the magnetic field, then the orbit will be
|
(a) A straight line |
(b) An ellipse |
(c) A circle |
(d) A helix |
The energy stored in the condenser is
|
(a) QV |
(b) |
(c) |
(d) |
A parallel beam of light is incident on a converging lens parallel to its principal axis. As one moves away from the lens on the other side on its principal axis, the intensity of light:
A bar magnet is held perpendicular to a uniform magnetic field. If the couple acting on the magnet is to be halved by rotating it, then the angle by which it is to be rotated is
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(a) 30o |
(b) 45o |
(c) 60o |
(d) 90o |
