Explanation:
$\text{K}=\frac{1}{4\pi\in_\circ\text{k}}$ and its units is N−m2/ C2
It depend on system of unit and dielectric constant (k), that's medium between charges
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Magnetic flux ∅ (in weber) linked with a closed circuit of resistance 10 ohm varies with time t (in seconds) as ∅ = 
The induced electromotive force in the circuit at t = 0.2 sec. is
|
(a) 0.4 volts |
(b) – 0.4 volts |
(c) – 2.0 volts |
(d) 2.0 volts |
The curve between current (i) and potential difference (V) for a photo cell will be
|
(a)
|
(b)
|
(c)
|
(d)
|
Between the primary and secondary rainbows, there is a dark band known as Alexandar’s dark band. This is because:
Sixty-four drops are jointed together to form a bigger drop. If each small drop has a capacitance C, a potential V, and a charge q, then the capacitance of the bigger drop will be
|
(a) C |
(b) 4C |
(c) 16C |
(d) 64C |
A radioactive nucleus undergoes a-emission to form a stable element. What will be the recoil velocity of the daughter nucleus if V is the velocity of a-emission and A is the atomic mass of radioactive nucleus
|
(a) |
(b) |
(c) |
(d) |
Energy released in the fission of a single 
nucleus is 200 MeV. The fission rate of a fuelled reactor operating at a power level of 5W is
|
(a) 1.56 |
(b) 1.56 |
(c) 1.56 |
(d) 1.56 |
