- AArea of the plate is decreased.
- BArea of the plate is increased.
- CDistance between the plates increases.
- DNone of the option.
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The neutron was discovered by
|
(a) Marie Curie |
(b) Pierre Curie |
(c) James Chadwick |
(d) Rutherford |

The two bulbs as in the above question are connected in series to a 200 volt line. Then
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(a) The potential drop across the two bulbs is the same |
|
(b) The potential drop across the 40 watt bulb is greater than the potential drop across the 100 watt bulb |
|
(c) The potential drop across the 100 W bulb is greater than the potential drop across the 40 W bulb |
|
(d) The potential drop across both the bulb is 200 volt |
A proton and an electron both moving with the same velocity v enter into a region of magnetic field directed perpendicular to the velocity of the particles. They will now move in circular orbits such that
|
(a) Their time periods will be same |
|
(b) The time period for proton will be higher |
|
(c) The time period for electron will be higher |
|
(d) Their orbital radii will be same |
A charge q is placed at the centre of the line joining two equal charges Q. The system of the three charges will be in equilibrium, if q is equal to
|
(a) |
(b) |
(b) |
(d) |
Which of the following phenomena suggests the presence of electron energy levels in atoms
|
(a) Radio active decay |
(b) Isotopes |
|
(c) Spectral lines |
(d) a -particles scattering |