Among two discs A and B, first have radius 10 cm and charge `10^(_6) -mu`C and second have radius 30 cm and charge `10^(-5)`- C. When they are touched

Question

Among two discs A and B, first have radius 10 cm and charge `10^(_6) -mu`C and second have radius 30 cm and charge `10^(-5)`- C. When they are touched

Among two discs A and B, first have radius 10 cm and charge `10^(_6) -mu`C and second have radius 30 cm and charge `10^(-5)`- C. When they are touched, charge on both `q_(A)` and` q_(B)` respectively will, be
A. `q_(A)=2.75muC, q_(B)=3.15muC`
B. `q_(A)=1.09muC, q_(B)=1.53muC`
C. `q_(A)=q_(B)=5.5muC`
D. None of these

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - C
When touched charge flows from higher potential to lower potential till equalizes on the two discs.
Given, `" "q_(A)=10^(-6)C, q_(b)=10^(-5)C`
`therefore" "q=(q_(A)+q_(B))/(2)=(10^(-6)+10^(-5))/(2)=5.5muC`

4 views Answered 2023-02-05 15:29