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Aspire NEET 2020: Capacitor and Capacitance-3

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Question 1

Two spherical capacitors A and B has the potential 10 V on its surface. If the radius of the capacitor is

. Find the ratio of their capacitance.

Question 2

If you want to increase the capacitance of a parallel plate capacitor, then which of the following parameter should be increased?

Question 3

What will be the amount of energy which is stored in a capacitor having capacitance 1000 pF and 16 V?

Question 4

A parallel plate air capacitor of 9 μF is mounted on a ceiling fan. The capacity of the capacitor becomes 36 μF when the distance between the plates is doubled and a dielectric material is inserted between the plates. What is the value of the dielectric constant of the inserted material?

Question 5

In an experiment of finding perfect dielectric material, the scientists connected a parallel plate capacitor to a 12 V battery. According to the readings, the capacitor collects a charge of 20 μC with air as dielectric medium and 100 μC with honey as dielectric medium. What will be the value of dielectric constant of honey?

Question 6

How many capacitors of 2 μF are required to be connected in a parallel in order to store a charge of 4 C with 1000 V potential difference across the capacitors.

Question 7

What will be the equivalent capacitance of a system of capacitors in which combination of two identical capacitors connected in series is connected to a identical capacitor in parallel?

Question 8

What will be the capacitance of a parallel plate air capacitor when the potentials of two plates are +5 V and −5 V and charge on one plate is 20 C?

Question 9

Which of the following is true about Capacitance and capacitors?

Question 10

Two condensers, one of capacity C and the other of capacity

, are connected to a V volt battery, as shown.

The work done is charging fully both the condensers is :

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Apr 30NEET & AIIMS