Question

A conductor A of capacity $4\mu F$ has a charge $20\mu C$ and another condenser B of capacity $10\mu F$ has a charge $40\mu C$ . If they are connected parallel, then:

• A. charge flows from B to A till the charges on them are equal.
• B. charge flows from B to A till common potential is reached
• C. charge flows from A to B till common potential is reached
• D. charge flows from A to B till charges on them are equal.

Answer 1

The correct option is C charge flows from A to B till common potential is reached

Voltage of A $V_A=\frac{v}{C}$
$V=\frac{20}{4}=5$
Voltage of B $V_B=\frac{q}{C}$
$=\frac{40}{10}$
$=4$
charge flows from high to low potential until both potential become equal.