Which is reverse biased diode
|
(a)
|
(b) |
(c) |
(d) |
Which is reverse biased diode
|
(a)
|
(b) |
(c) |
(d) |
(b)
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An infinite number of identical capacitors each of capacitance 1 μF are connected as in adjoining figure. Then the equivalent capacitance between A and B is
|
(a) 1 μF |
(b) 2 μF |
(c) |
(d) ∞ |
In the process of electrolysis, the current is carried out inside the electrolyte by
|
(a) Electrons |
(b) Atoms |
|
(c) Positive and negative ions |
(d) All the above |
The e.m.f. of a standard cell balances across 150 cm length of a wire of potentiometer. When a resistance of 2 Ω is connected as a shunt with the cell, the balance point is obtained at 100 cm. The internal resistance of the cell is
|
(a) 0.1 Ω |
(b) 1 Ω |
(c) 2 Ω |
(d) 0.5 Ω |
For a transistor the parameter b = 99. The value of the parameter a is
|
(a) 0.9 |
(b) 0.99 |
(c) 1 |
(d) 9 |
A long solenoid has 200 turns per cm and carries a current of 2.5 amps. The magnetic field at its centre is (![]()
|
(a) 3.14 |
(b) 6.28 |
|
(c) 9.42 |
(d) 12.56 |