MCQ
Two infinite plane parallel sheets separated by a distance $d$ have equal and opposite uniform charge densities $\sigma$. Electric field at a point between the sheets is
  • A
    Zero
  • $\frac{\sigma}{\varepsilon_0}$
  • C
    $\frac{\sigma}{2 \varepsilon_0}$
  • D
    Depends upon the location of the point

Answer

Correct option: B.
$\frac{\sigma}{\varepsilon_0}$
$\frac{\sigma}{\varepsilon_0}$

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

The photoelectric current does not depend upon the:
  1. Frequency of incident light.
  2. Work function of the metal.
  3. Stopping potential.
  4. Intensity of incident light.
The Bohr radius of the fifth electron of phosphorus (atomic number = 15) acting as dopant in silicon (relative dielectric constant = 12) is(a) 10.6 Å(b) 0.53 Å(c) 21.2 Å                                           (d) None of these
       
When the intensity of a light source is increased:
  1. The number of photons emitted by the source in unit time increases.
  2. The total energy of the photons emitted per unit time increases.
  3. More energetic photons are emitted.
  4. Faster photons are emitted.
While a capacitor remains connected to a battery and dielectric slab is applied between the plates, then(a) Potential difference between the plates is changed(b) Charge flows from the battery to the capacitor(c) Electric field between the plates increases(d) Energy store in the capacitor decreases
   
   
Light waves travel in vacuum along the X-axis. Which of the following may represent the wavefronts?
  1. x = c.
  2. y = c.
  3. z = c.
  4. x + y + z = c.
A lightning arrester must have the following property.
Consider the points lying on a straight line joining two fixed opposite charges. Between the charges there is (a) No point where electric field is zero(b) Only one point where potential is zero(c) Only one point where electric field is zero(d) a, b
 
 
 
 
A simple microscope has:
Longitudinal waves cannot:
  1. Have a unique wavelength
  2. Transmit energy
  3. Have a unique wave velocity
  4. Be polarized.
The strength of the magnetic field in which the magnet of a vibration magnetometer is oscillating is increased 4 times its original value. The frequency of oscillation would then become(a) Twice its original value(b) Four times its original value(c) Half its original value(d) One-fourth its original value