- AAre closer in regions of large electric fields compared to regions of lower electric fields.
- BWill be more crowded near sharp edges of a conductor.
- CWill be more crowded near regions of large charge densities.
- DWill always be equally spaced.
Equipotential surfaces are closer in regions of large electric fields because electric field intensity is inversely proportional to the separation between equipotential surfaces.
As the electric field intensities is large near sharp edges of a charged conductor or near the regions of large charge densities. Therefore, numbers of equipotential surfaces are closer to such places or in other words they are more crowded.
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In an FM system a 7 kHz signal modulates 108 MHz carrier so that frequency deviation is 50 kHz. The carrier swing is
|
(a) 7.143 |
(b) 8 |
(c) 0.71 |
(d) 350 |
The effective resistance between points P and Q of the electrical circuit shown in the figure is
|
(a) 2Rr/(R + r) |
(b) 8R(R + r)/(3R + r) |
(c) 2r + 4R |
(d) 5R/2 + 2r |
The maximum current that flows through a fuse wire before it blows out varies with its radius as
|
(a) |
(b) r |
(c) |
(d) |
$\text{P}=\lim_\limits{\triangle\text{s}\rightarrow0}\frac{\text{F}}{\triangle\text{s}}$ and $\text{P}_1-\text{P}_2-\text{pgz}$
In an elevator accelerating upward.Which one of the following have minimum wavelength
|
(a) Ultraviolet rays |
(b) Cosmic rays |
(c) X-rays |
(d) γ - rays |
Penetrating power of X-rays does not depend on
|
(a) Wavelength |
(b) Energy |
|
(c) Potential difference |
(d) Current in the filament |
In the given figure, battery E is balanced on 55 cm length of potentiometer wire but when a resistance of 10 W is connected in parallel with the battery then it balances on 50 cm length of the potentiometer wire then internal resistance r of the battery is

|
(a) 1 W |
(b) 3 W |
(c) 10 W |
(d) 5 W |
A helium nucleus makes a full rotation in a circle of radius 0.8 metre in two seconds. The value of the magnetic field B at the centre of the circle will be
|
(a) |
(b) |
(c) 2 |
(d) |
The shortest wavelength of X-rays emitted from an X-ray tube depends on the
|
(a) Current in the tube |
(b) Voltage applied to the tube |
|
(c) Nature of gas in the tube |
(d) Atomic number of target material |