MCQ
Inside a conductor electrostatic field is:
- AInfinite.
- BConstant.
- CZero.
- DNone.
✓
Answer
- Zero.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
A parallel plate capacitor of capacitance C is connected to a battery and is charged to a potential difference V. Another capacitor of capacitance 2C is connected to another battery and is charged to potential difference 2V. The charging batteries are now disconnected and the capacitors are connected in parallel to each other in such a way that the positive terminal of one is connected to the negative terminal of the other. The final energy of the configuration is
|
(a) Zero |
(b) |
(c) |
(d) |
The $\gamma\ \text{radiations}$ are:
→Which of the following particles will describe the smallest circle when projected with the same velocity perpendicular to a magnetic field?
- Electron
- Proton
- He+
- Li+
If cathode rays are projected at right angles to a magnetic field, their trajectory is
|
(a) Ellipse |
(b) Circle |
(c) Parabola |
(d) None of these |
A and B are two concentric circular conductors of centre O and carrying currents 
and 
as shown in the adjacent figure. If ratio of their radii is 1 : 2 and ratio of the flux densities at O due to A and B is 1 : 3, then the value of 
is
|
(a) |
(b) |
(c) |
(d) |
Assertion : In the following circuit emf is 2V and internal resistance of the cell is 1 W and R = 1W, then reading of the voltmeter is 1V.
Reason : V = E - ir where E = 2V, i = 
and R = 1 W
|
(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. |
Dimensions of $\frac{1}{(\mu_0\in_0)}$ is:
→If frequency of the incident photon on the metal surface is made double, then kinetic energy of the emitted photoelectron will become :
The ratio of speed of an electron in ground state in Bohrs first orbit of hydrogen atom to velocity of light in air is
|
(a) |
(b) |
(c) |
(d) |
In nuclear reactions, we have the conservation of
|
(a) Mass only |
(b) Energy only |
|
(c) Momentum only |
(d) Mass, energy and momentum |