Question

Q11. Parallel plate capacitor stores 20 uC
charge when connected across a battery.
When the gap between the plates is filled
with a dielectric, it stores 50 uC of charge.
Calculate the dielectric constant of the mate-
rial inserted.

Ans: 2.5

Q1. Two capacitors of capacitance 15uF and 25uF
are charged to 40V and 30V respectively. If they
are connected in parallel, calculate the energy
stored in each capacitor after connecting them in
parallel.

Ans: 1.424 x 10-2J.

Q2. Three condensers of capacity 5uF, 4uF, 3 uF
respectively are connected with the first and
second in series and the third in parallel with
them. Find the capacity of the combination.

Ans: 5.222uF.

Q3. Two condensers of capacity 5uF and 10uF
are charged to 16volts and 13volts respectively.
What is the common potential when they are
connected in parallel?

Ans: 14 V
Q4. A parallel plate condenser has two plates of
side 5.5cm and 4cm. Their distance apart is
0.7mm. The dielectric constant of the medium
in between is 4. Find the capacity of the
condenser.
Ans: 1113 pF.
Q5. Calculate the charge on a parallel plate air
condenser consisting of two plates each of area
200sq.cm separated by 1 mm when plates are
charged to a potential of 800 volts.
Ans: 1417 nC.
Q6. Three capacitance of value 10uF, 20uF and
30uF are switched in such a way that last two
are in series and the first in parallel with them.​

Answer 1

Answer:

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