If there are n capacitors in parallel connected to V volt source, then the energy stored is equal to
|
(a) CV |
(b) |
(c) |
(d) |
If there are n capacitors in parallel connected to V volt source, then the energy stored is equal to
|
(a) CV |
(b) |
(c) |
(d) |
(b)
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Energy bands in solids are a consequence of
|
(a) Ohm’s Law |
(b) Pauli’s exclusion principle |
|
(c) Bohr’s theory |
(d) Heisenberg’s uncertainty principle |
In a metre bridge experiment null point is obtained at 20 cm from one end of the wire when resistance X is balanced against another resistance Y. If X < Y, then where will be the new position of the null point from the same end, if one decides to balance a resistance of 4X against Y
|
(a) 50 cm |
(b) 80 cm |
(c) 40 cm |
(d) 70 cm |
Assertion : If three identical bulbs are connected in series as shown in figure then on closing the switches. Bulb C short circuited and hence illumination of bulbs A and B decreases.

Reason : Voltage on A and B decreases
|
(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
|
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
|
(c) If assertion is true but reason is false. |
|
(d) If the assertion and reason both are false. |
A battery is connected between two points A and B on the circumference of a uniform conducting ring of radius r and resistance R. One of the arcs AB of the ring subtends an angle θ at the centre. The value of the magnetic induction at the centre due to the current in the ring is
|
(a) Proportional to 2(180° - θ) |
(b) Inversely proportional to r |
|
(c) Zero, only if θ = 180° |
(d) Zero for all values of θ |
A long thin hollow metallic cylinder of radius 'R' has a current i ampere. The magnetic induction 'B'-away from the axis at a distance r from the axis varies as shown in
|
(a)
|
(b)
|
(c)
|
(d)
|
In the experiment of potentiometer, at balance, there is no current in the
|
(a) Main circuit |
|
(b) Galvanometer circuit |
|
(c) Potentiometer circuit |
|
(d) Both main and galvanometer circuits |
For production of characteristic
X-rays, the electron transition is
|
(a) n = 2 to n = 1 |
(b) n = 3 to n = 2 |
(c) n = 3 to n = 1 |
(d) n = 4 to n = 2 |