Question

The energy stored in the condenser is

(a) QV

(b)  

(c)  

(d)  

Answer

(b)  

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

A Daniel cell is balanced on 125 cm length of a potentiometer wire. Now the cell is short-circuited by a resistance 2 ohm and the balance is obtained at 100 cm. The internal resistance of the Daniel cell is

(a) 0.5 ohm

(b) 1.5 ohm

(c) 1.25 ohm

(d) 4/5 ohm

If the series resistance decreases in an unloaded zener regulator, the zener current:

The area of the plates of a parallel plate condenser is A and the distance between the plates is 10 mm. There are two dielectric sheets in it, one of dielectric constant 10 and thickness 6mm and the other of dielectric constant 5 and thickness 4mm. The capacity of the condenser is

(a)  

(b)

(c)     

(d) 1500

Water is flowing in streamliries motion through a tube with its axis horizontal Consider two points A and B in the tube at the same horizontal level:
  1. The pressures at A and B are equal for any shape of the tube.
  2. The pressures are never equal.
  3. The pressures are equal if the tube has a uniform cross section.
  4. The pressures may be equal even if the tube has a nonuniform cross section.
A free neutron decays to a proton but a free proton does not decay to a neutron. This is because:
  1. Neutron is a composite particle made of a proton and an electron whereas proton is a fundamental particle.
  2. Neutron is an uncharged particle whereas proton is a charged particle.
  3. Neutron has large rest mass than the proton.
  4. Weak forces can operate in a neutron but not in a proton.
The length of a wire required to manufacture a solenoid of length l and self-induction L is (cross-sectional area is negligible)
The minimum heat energy required to emit an electron from the surface of a metal is called _________:
Choose the correct answer from the alternatives given.
Displacement current goes through the gap between the plates of a capacitor when the charge of the capacitor.
The free electron density is more in .....:

If the separation between slits in Young’s double slit experiment is reduced to   the fringe width becomes n times. The value of n is

(a) 3 

(b)  

(c) 9  

(d)