Download App

Electrostatics — Physics STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 SciencePhysicsElectrostatics1 Mark
MCQ
The energy stored in the condenser is
  • A
    $QV$
  • ✓
    $\frac{1}{2} QV$
  • C
    $\frac{1}{2} C$
  • D
    $\frac{1}{2} \frac{Q}{C}$ 
✓

Answer

Correct option: B.
$\frac{1}{2} QV$
$\frac{1}{2} QV$

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

Explore more

More "M.C.Q (1 Marks)" from Electrostatics→Electrostatics — all question types→Physics STD 12 Science question papers→Rajasthan Board STD 12 Science question papers→Rajasthan Board question paper generator→

Similar questions

In a transformer, the number of turns in primary and secondary are 500 and 2000 respectively. If current in primary is 48 A, the current in the secondary is
→
Magnets $A$ and $B$ are geometrically similar but the magnetic moment of $A$ is twice that of $B$. If $T_1$ and $T_2$ be the time periods of the oscillation when their like poles and unlike poles are kept together respectively, then $\frac{T_1}{T_2}$ will be 
→
Let V and E represent the gravitational potential and field at a distance r from the centre of a uniform solid sphere. Consider the two statements:
  1. The plot of V against r is discontinuous.
  2. The plot of E against r is discontinuous.
  1. Both A and B are correct.
  2. A is correct but B is wrong.
  3. B is correct but A is wrong.
  4. Both A and B are wrong.
→
A uniform rod is kept vertically on a horizontal smooth surface at a point O. If it is rotated slightly and released, it falls down on the horizontal surface. The lower end will remain:
  1. At O.
  2. At a distance less than $\frac{\text{l}}2{}$ from O.
  3. At a distance $\frac{\text{l}}2{}$ from O.
  4. At a distance larger than $\frac{\text{l}}2{}$ from O.
→
If an electron revolves in the path of a circle of radius of $0.5 \times 10^{-10} m$ at frequency of $5 \times 10^{15}$ cycles $/ \mathrm{s}$ the electric current in the circle is $($Charge of an electron $=1.6 \times 10^{-19} \mathrm{C} )$
→
A scooter starting from rest moves with a constant acceleration for a time $\triangle\text{t}_1,$ then with a constant velocity for the next $\triangle\text{t}_2,$ and finally with a constant deceleration for the next $\triangle\text{t}_3$ to come to rest. A $500N$ man sitting on the scooter behind the driver manages to stay at rest with respect to the scooter without touching any other part. The force exerted by the seat on the man is:
→
Modern atomic mass scale is based on the mass of:
→
For diffraction of light, it is necessary that the size of the obstacle in comparison to the wavelength of light waves will be :
→
The inductance of a coil is $60\ \mu H.$ A current in this coil increases from $1.0 A$ to $1.5 A$ in $0.1$ second. The magnitude of the induced $\text{e.m.f.}$ is
→
The transition of electron from $n = 4, 5, 6, ……….$ to $n = 3$ corresponds to:
→