NextMockSearch exams, e.g. SSC CGL, UPPSC, Lekhpal
हिंदी
State PCS PYQPrelims 2019

UPPCS · Question 47

What happens when some charge is placed on a soap bubble?

  1. Its radius increases
  2. Its radius decreases
  3. The bubble collapses
  4. None of the above
Show answer & explanation

Answer: (A) Its radius increases

Explanation

Charge spreads over the bubble's surface, and the mutual repulsion creates an outward electrostatic pressure, so the radius increases.