NextMockપરીક્ષાઓ શોધો, દા.ત. SSC CGL, UPPSC, Lekhpal
State PCS PYQPrelims 2019

UPPCS · પ્રશ્ન 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
જવાબ બતાવો અને સમજૂતી

જવાબ: (A) Its radius increases

સમજૂતી

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