- ADepends on the maximum area of the capacitor.
- BDepends on the maximum resistance offered.
- CDepends on the maximum electric field.
- DDepends on the maximum current passing through the capacitor.
Explanation:
The maximum energy that can be desirably stored in a capacitor is depends on the maximum electric field that the dielectric can withstand without breaking down. Therefore, capacitors of the same type have about the same maximum energy density, i.e. joules of energy per cubic meter.
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Which of the following has a larger chromatic aberration?
When the wavelength of light coming from a distant star is measured it is found shifted towards red. Then the conclusion is
|
(a) The star is approaching the observer |
(b) The star recedes away from earth |
|
(c) There is gravitational effect on the light |
(d) The star remains stationary |
Two resistances and
are joined as shown in the figure to two batteries of e.m.f.
and
. If
is short-circuited, the current through
is
|
(a) |
(b) |
(c) |
(d) |
If two wires having resistance R and 2R. Both joined in series and in parallel then ratio of heat generated in this situation, applying the same voltage,
|
(a) 2 : 1 |
(b) 1 : 2 |
(c) 2 : 9 |
(d) 9 : 2 |