SATHEE: Electrostatics Question 688

Electrostatics Question 688

Question: Among two discs A and B, first have radius 10 cn and charge $10^{- 6} μ C$ 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

Options:

A) $q_{A} = 2.75 μ C, q_{B} = 3.15 μ C$

B) $q_{A} = 1.09 μ C, q_{B} = 5.5 μ C$

C) $q_{A} = q_{B} = 5.5 μ C$

D) None of these

Show Answer

Answer:

Correct Answer: C

Solution:

[c] The charge on disc A is $10^{- 6} μ C .$

The charge on disc B is $10 \times 10^{- 6} μ C .$

The total this charge on both $= 11 μ C .$

When touched, this charge will be distributed equally i.e. $5.5 μ C$ on each disc.

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Electrostatics Question 688

Question: Among two discs A and B, first have radius 10 cn and charge 10−6μC and second have radius 30 cm and charge 10−5C. When they are touched, charge on both qA and qB respectively will, be

Options:

Answer:

Solution:

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Question: Among two discs A and B, first have radius 10 cn and charge $10^{- 6} μ C$ 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