Question

20. Among two discs A and B, first have radius 10 cm and charge
10- uC and second have radius 30 cm and charge 10 C.
When they are touched, charge on both 9A and Yg
respectively will be
(a) 9A=2.75 uC, 48 =3.15 uc
(b) 4A=1.09 uC, 43=1.53°C
(c) 4A = 48=5.5°C
(d) None of these
T
i lannunting anheres ofenal radins have charges​

Answer 1

Answer:

Explanation:

Correct Answer: C

Solution :

When touched charge flows from higher potential to lower potential till it equalises on the two discs. Given,     q1=10−6C,q2=10−5C ∴ q=q1+q22=10−6+10−52=5.5μC