- AC
- BC/ m
- CC/ m2
- DC/ m3
Explanation:
Surface charge density means how much charge is stored in the unit surface area of a conductor.
So, it’s unit will be$=\frac{\text{the unit of the charge}}{\text{the unit of area}}$. In SI the unit of charge is Coulomb and the unit of area is m2.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Which of the following statement is correct
|
(a) Liquids obey fully the ohm's law |
|
(b) Liquids obey partially the ohm's law |
|
(c) There is no relation between current and p.d. for liquids |
|
(d) None of the above |
Putting a dielectric substance between two plates of condenser, capacity, potential and potential energy respectively
|
(a) Increase, decrease, decrease |
(b) Decrease, increase, increase |
|
(c) Increase, increase, increase |
(d) Decrease, decrease, decrease |
The length of a given cylindrical wire is increased by 100 %. Due to the consequent decrease in diameter the change in the resistance of the wire will be
|
(a) 300 % |
(b) 200 % |
(c) 100 % |
(d) 50 % |
V-i graphs for parallel and series combination of two identical resistors are as shown in figure. Which graph represents parallel combination

|
(a) A |
(b) B |
(c) A and B both |
(d) Neither A nor B |
Radius of first Bohr orbit is r. What is the radius of 2nd Bohr orbit?
| (a) 8r | (b) 2r | (c) 4r |
(d) 2 |
Find the equivalent resistance across AB
|
(a) 1 W |
(b) 2 W |
(c) 3 W |
(d) 4 W |
In the given figure, which of the diodes are forward biased ?
1.
2.
3.
4.
5. 
|
(a) 1, 2, 3 |
(b) 2, 4, 5 |
(c) 1, 3, 4 |
(d) 2, 3, 4 |
If half-life of a substance is 3.8 days and its quantity is 10.38 gm. Then substance quantity remaining left after 19 days will be
|
(a) 0.151 gm |
(b) 0.32 gm |
(c) 1.51 gm |
(d) 0.16 gm |
Which gates is represented by this figure

|
(a) NAND gate |
(b) AND gate |
(c) NOT gate |
(d) OR gate |