An electron enters between two horizontal plates separated by 2mm and having a potential difference of 1000V. The force on electron is
|
(a) 8 |
(b) 8 |
(c) 8 |
(d) 8 |
(b) 8
N
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The S.I. unit of electric flux is
|
(a) Weber |
(b) Newton per coulomb |
|
(c) Volt × metre |
(d) Joule per coulomb |
In the forward bias arrangement of a PN-junction diode
|
(a) The N-end is connected to the positive terminal of the battery |
|
(b) The P-end is connected to the positive terminal of the battery |
|
(c) The direction of current is from N-end to P-end in the diode |
|
(d) The P-end is connected to the negative terminal of battery |
The dual nature of light is exhibited by
|
(a) Photoelectric effect |
(b) Refraction and interference |
|
(c) Diffraction and reflection |
(d) Diffraction and photoelectric effect |
A 700 pF capacitor is charged by a 50 V battery. The electrostatic energy stored by it is
|
(a) 17.0 |
(b) 13.6 |
(c) 9.5 |
(d) 8.7 |
If mean wavelength of light radiated by 100 W lamp is 5000 Å, then number of photons radiated per second are
|
(a) 3 |
(b) 2.5 |
(c) 2.5 |
(d) 5 |
