Download App

Electric Charges and Fields — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsElectric Charges and Fields1 Mark
MCQ
Earth is the source of __________?
  • A
    An infinite positive and negative charge.
  • B
    Positive charge.
  • C
    Negative charge.
  • D
    Zero charge.
✓

Answer

  1. An infinite positive and negative charge.

Explanation:

Earth can be considered as an infinite source of positive and negative charges.

This can be justified by the fact that if we connect any positive or negatively charged body to the ground, all of its charges will go to earth.

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 Electric Charges and Fields→Electric Charges and Fields — all question types→Physics STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

The surface charge destiny of tin charged disc of radius R is $\sigma$ The value of the electric filed at the centre of the disc is $\frac{\sigma}{2\in_0}$ With reapect to the field the centre the electric field along the axis at distance R from the centre of the disc.
→

The angle of dip is the angle

(a) Between the vertical component of earth's magnetic field and magnetic meridian

(b) Between the vertical component of earth's magnetic field and geographical meridian

(c) Between the earth's magnetic field direction and horizontal direction

(d) Between the magnetic meridian and the geographical meridian
→
The molar heat capacity for the process shown in the figure is:
  1. C = Cp
  2. C = Cv
  3. C > Cv
  4. C = 0

→

A achromatic combination is made with a lens of focal length f and dispersive power ω with a lens having dispersive power of 2ω. The focal length of second will be

(a) 2f

(b) f/2

(c) -f/2

(d) – 2 f

→

A concave lens of glass, refractive index 1.5, has both surfaces of same radius of curvature R. On immersion in a medium of refractive index 1.75, it will behave as a

(a) Convergent lens of focal length 3.5 R

(b) Convergent lens of focal length 3.0 R

(c) Divergent lens of focal length 3.5 R

(d) Divergent lens of focal length 3.0 R
→

Two wires A and B of same material and same mass have radius 2rand r. If resistance of wire A is 34 Ω, then resistance of B will be

(a) 544 Ω

(b) 272 Ω

(c) 68 Ω

(d) 17 Ω

→
Figure. shows graphs of pressure vs density for an ideal gas at two temperatures T1 and T2.
  1. T1 > T2
  2. T1 = T2
  3. T1 < T2
  4. Any of the three is possible.

→
Consider the motion of the tip of the minute hand of a clock. In one hour:
  1. The displacement is zero.
  2. The distance covered is zero.
  3. The average speed is zero.
  4. The average velocity is zero.
→

An N-type and P-type silicon can be obtained by doping pure silicon with

(a) Arsenic and Phosphorous

(b) Indium and Aluminium

(c) Phosphorous and Indium

(d) Aluminium and Boron
→
A small, conducting circular loop is placed inside a long solenoid carrying a current. The plane of the loop contains the axis of the solenoid. If the current in the solenoid is varied, the current induced in the loop is:
  1. Clockwise.
  2. Anticlockwise.
  3. Zero.
  4. Clockwise or anticlockwise depending on whether the resistance in increased or decreased.
→