MCQ
The correct curve representing the variation of capacitive reactance Xc with frequency f is.
- A

- B

- C

- D






Explanation:
$\text{X}_\text{C}=\frac{1}{\text{C}2\pi\text{f}}$
XC and f are inversely proportional.
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In the circuit shown P ≠ R, the reading of the galvanometer is same with switch S open or closed. Then
|
(a) |
(b) |
(c) |
(d) |

In a junction diode, the holes are due to
| (a) Protons | (b) Neutrons | (c) Extra electrons | (d) Missing of electrons |
What physical quantities may X and Y represent ? (Y represents the first mentioned quantity)

|
(a) Pressure v/s temperature of a given gas (constant volume) |
|
(b) Kinetic energy v/s velocity of a particle |
|
(c) Capacitance v/s charge to give a constant potential |
|
(d) Potential v/s capacitance to give a constant charge |