Download App

Gausss Law — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsGausss Law1 Mark
Question
A thin, metallic spherical shell contains a charge Q on it. A point charge q is placed at the centre of the shell and another charge q1 is placed outside it as shown in figure. All the three charges are positive. The force on the charge at the centre is:

  1. Towards left.
  2. Towards right.
  3. Upward.
  4. Zero.
✓

Answer

  1. Zero.

Explanation:

Electric field due to Q & q, inside the spherical shell is zero.

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 Gausss Law→Gausss Law — all question types→Physics STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

In the previous question, the smallest kinetic energy at the bottom of the incline will be achieved by:
  1. The solid sphere.
  2. The hollow sphere.
  3. The disc.
  4. All will achieve same kinetic energy.
→

If a coil of metal wire is kept stationary in a non-uniform magnetic field, then

(a) An e.m.f. is induced in the coil

(b) A current is induced in the coil

(c) Neither e.m.f. nor current is induced

(d) Both e.m.f. and current is induced
→
If an element X has mass number and number of proton 8 then identify element X :
→
The reaction $^2_1\text{H}$+$^2_1\text{H}$→$^3_2\text{H}$+$^1_0\text{n}$ is called:
→

Angular  width (b) of central maximum of a diffraction pattern on a single slit does not depend upon

(a) Distance between slit and source

(b) Wavelength of light used

(c) Width of the slit

(d) Frequency of light used
→

Ionization potential of hydrogen atom is 13.6 V.

Hydrogen atoms in the ground state are excited by monochromatic radiation of photon energy 12.1 eV. The spectral lines emitted by hydrogen atoms according to Bohr's theory will be

(a) One   

(b) Two

(c) Three

(d) Four
→
A 6kHz sinusoidal voltage is applied to a series RC circuit. The frequency of the voltage across the resistor is.
→

An alternating current of frequency 200 rad/sec and peak value 1A as shown in the figure, is applied to the primary of a transformer. If the coefficient of mutual induction between the primary and the secondary is 1.5 H, the voltage induced in the secondary will be

(a) 300 V

(b) 191 V

(c) 220 V 

(d) 471 V
→
A particle moves on a straight line with a uniform velocity. Its angular momentum:
  1. Is always zero.
  2. Is zero about a point on the straight line.
  3. Is not zero about a point away from the straight line.
  4. About any given point remains constant.
→
The wavefronts of a light wave travelling in vacuum are given by x + y + z = c. The angle made by the direction of propagation of light with the X-axis is:

  1. $0^\circ$

  2. $45^\circ$

  3. $90^\circ$

  4. $\cos^{-1}\Big(\frac{1}{\sqrt{3}}\Big)$

→