- Aas an amplifier
- ✓as a rectifier
- Cin the form of oscillator
- Das a modulator
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Radius of first Bohr orbit is r. What is the radius of 2nd Bohr orbit?
| (a) 8r | (b) 2r | (c) 4r |
(d) 2 |
An electric dipole is put in north-south direction in a sphere filled with water. Which statement is correct
|
(a) Electric flux is coming towards sphere |
|
(b) Electric flux is coming out of sphere |
|
(c) Electric flux entering into sphere and leaving the sphere are same |
|
(d) Water does not permit electric flux to enter into sphere |
A wire has a resistance of 12 ohm. It is bent in the form of equilateral triangle. The effective resistance between any two corners of the triangle is
|
(a) 9 ohms |
(b) 12 ohms |
(c) 6 ohms |
(d) 8/3 ohms |
In the circuit, if the forward voltage drop for the diode is 0.5V, the current will be

|
(a) 3.4 mA |
(b) 2 mA |
(c) 2.5 mA |
(d) 3 mA |
In an RC circuit while charging, the graph of in i versus time is as shown by the dotted line in the diagram figure, where i is the current. When the value of the resistance is doubled, which of the solid curve best represents the variation of in i versus time

|
(a) P |
(b) Q |
(c) R |
(d) S |
A capacitor of capacity
is charged upto V volt and then connected to an uncharged capacitor of capacity
. Then final potential difference across each will be
|
(a) |
(b) |
(c) |
(d) |
A deutron is bombarded on
nucleus and a-particle is emitted. The product nucleus is
|
(a) |
(b) |
(c) |
(d) |
A group of bright and faint stars is called
|
(a) Galaxy |
(b) Comet |
(c) Black hole |
(d) Constellation |