Explanation:
de – Broglie concluded his modification of Bohr’s second postulate by stating that the wavelengths of matter waves can be quantized.
This implies that the electrons can exist in those orbits which had a complete set of several wavelengths.
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Consider the following statements A and B and identify the correct choice of the given answers
A : The width of the depletion layer in a P-N junction diode increases in forwards bias
B : In an intrinsic semiconductor the fermi energy level is exactly in the middle of the forbidden gap
|
(a) A is true and B is false |
(b) Both A and B are false |
|
(c) A is false and B is true |
(d) Both A and B are true |
Through two parallel wires A and B, 10 and 2 ampere of currents are passed respectively in opposite direction. If the wire A is infinitely long and the length of the wire B is 2 m, the force on the conductor B, which is situated at 10 cm distance from A will be
|
(a) 8 |
(a) 8 |
(c) 4 |
(d) 4π |
Ultraviolet light of wavelength 300 nm and intensity 1.0 watt/m2 falls on the surface of a photosensitive material. If 1% of the incident photons produce photoelectrons, then the number of photoelectrons emitted from an area of 1.0 cm2 of the surface is nearly
|
(a) 9.61 |
(b) 4.12 |
|
(c) 1.51 |
(d) 2.13 |
Two ions having masses in the ratio 1 : 1 and charges 1 : 2 are projected into uniform magnetic field perpendicular to the field with speeds in the ratio 2 : 3. The ratio of the radii of circular paths along which the two particles move is
|
(a) 4 : 3 |
(b) 2 : 3 |
(c) 3 : 1 |
(d) 1 : 4 |
