- AProduct of the individual capacitors in parallel.
- BSum of all the individual capacitors in parallel.
- CSum of their reciprocals.
- DProduct of their reciprocals.
Explanation:
The equivalent capacitance of the capacitors connected in parallel is given by sum of their individual capacitances, that is if there are n capacitors in parallel the total capacitance is given by, C = C1 + C2 + C3 + C4 + ….. + Cn.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
The back e.m.f. induced in a coil, when current changes from 1 ampere to zero in one milli‑second, is 4 volts, the self inductance of the coil is
|
(a) 1 H |
(b) 4 H |
(c) |
(d) 4 |
Assertion : A P-N photodiode is made from a semiconductor for which Eg = 2.8 eV. This photo diode will not detect the wavelength of 6000 nm.
Reason : A PN photodiode detect wavelength l if
.
|
(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
|
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
|
(c) If assertion is true but reason is false. |
|
(d) If the assertion and reason both are false. |
Four lowest energy levels of H-atom are shown in the figure. The number of possible emission lines would be

|
(a) 3 |
(b) 4 |
(c) 5 |
(d) 6 |

Photons of energy 6 eV are incident on a metal surface whose work function is 4 eV. The minimum kinetic energy of the emitted photo-electrons will be
|
(a) 0 eV |
(b) 1 eV |
(c) 2 eV |
(d) 10 eV |
The example for non-ohmic resistance is
|
(a) Copper wire |
(b) Carbon resistance |
(c) Diode |
(d) Tungston wire |