In P-N junction, avalanche current flows in circuit when biasing is
| (a) Forward | (b) Reverse | (c) Zero | (d) Excess |
In P-N junction, avalanche current flows in circuit when biasing is
| (a) Forward | (b) Reverse | (c) Zero | (d) Excess |
(b) Reverse
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When a current is passed through water, acidified with a dilute sulphuric acid, the gases formed at the platinum electrodes are
|
(a) 1 vol. hydrogen (cathode) and 2 vol. oxygen (anode) |
|
(b) 2 vol. hydrogen (cathode) and 1 vol. oxygen (anode) |
|
(c) 1 vol. hydrogen (cathode) and 1 vol. oxygen (anode) |
|
(d) 1 vol. oxygen (cathode) and 2 vol. hydrogen (anode) |
Figure (i) shows a conducting loop being pulled out of a magnetic field with a speed v. Which of the four plots shown in figure (ii) may represent the power delivered by the pulling agent as a function of the speed v

|
(a) a |
(b) b |
(c) c |
(d) d |
The diagram shows the path of four a-particles of the same energy being scattered by the nucleus of an atom simultaneously. Which of these are/is not physically possible

|
(a) 3 and 4 |
(b) 2 and 3 |
(c) 1 and 4 |
(d) 4 only |
A photocell stops emission if it is maintained at 2V negative potential. The energy of most energetic photoelectron is
|
(a) 2eV |
(b) 2J |
(c) 2kJ |
(d) 2keV |
What will be the equivalent resistance between the two points A and D
|
(a) 10 Ω |
(b) 20 Ω |
(c) 30 Ω |
(d) 40 Ω |