- ACharged, neutral.
- BNeutral, charged.
- CDischarged, charged.
- DActive, reactive.
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A radioactive nucleus
decays to
. Which of the following particles are emitted
|
(a) One alpha and one electron |
(b) Two deuterons and one positron |
|
(c) One alpha and one proton |
(d) One proton and four neutrons |
Two parallel wires are carrying electric currents of equal magnitude and in the same direction. They exert
|
(a) An attractive force on each other |
(b) A repulsive force on each other |
|
(c) No force on each other |
(d) A rotational torque on each other |
A circular current carrying coil has a radius R. The distance from the centre of the coil on the axis where the magnetic induction will be
to its value at the centre of the coil, is
|
(a) |
(b) R |
(c) 2 |
(d) |
The distance between the focus and the pole of the mirror is called:
A charge q is placed at the centre of a cube. Then the flux passing through one face of cube will be
|
(a) |
(b) |
(c) |
(d) |