Class XII

Electric field lines can be said to be
  1. drawing lines of electric fields
  2. lines of equal Electric field
  3. graphical representation of electric fields.
  4. lines of equal Electric voltage
Electric field at a point is defined as
  1. electric force experienced by a charge at that point
  2. electric force per unit charge experienced by a unit charge at that point
  3. electric force experienced by two charges at that point
  4. electric force per unit charge experienced by a unit charge at that point
Charge is quantized means
  1. charge cannot take any arbitrary values, but only values that are integral multiples of the fundamental charge(charge of proton/electron)
  2. charges can take on discrete values that are multiples of charge on neutron
  3. charges can take on any discontinuous value
  4. charges can take on any continuous value
A conducting sphere of radius 5 cm is charged to 15 μμ C. Another uncharged sphere of radius 10 cm is allowed to touch it for enough time. After the two are separated, the surface density of charge on the two spheres will be in the ratio
  1. 1:2
  2. 2:1
  3. 1:1
  4. 3:1
Two positive charges
  1. repel each other
  2. attract each other
  3. always attract each other
  4. attract each other at times and repel at other times
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