Alpha Question Bank for Medical: Physics>Chapter 23 - Capacitance>Exercise-1>Q 2

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Relative permittivity of mica is:

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Important Questions on Capacitance

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Alpha Question Bank for Medical: Physics>Chapter 23 - Capacitance>Exercise-1>Q 3

Two spherical conductors

A

and

B

of radii

1 mm

and

2 mm

are separated by a distance of

5 cm

and are uniformly charged .If the spheres are connected by a conducting wire ,then in equilibrium condition ,the ratio of the magnitudes of the electric fields at the surfaces of spheres

A

and

B

is

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Alpha Question Bank for Medical: Physics>Chapter 23 - Capacitance>Exercise-1>Q 4

A sphere of radius

1 cm

has potential of

8000 V .

The energy density near the surface of the sphere will be:

ε_{0} = 8.85 \times 10^{- 12} C^{2} N^{- 1} m^{- 2}

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Alpha Question Bank for Medical: Physics>Chapter 23 - Capacitance>Exercise-1>Q 5

The radii of two metallic spheres are

5 cm

and

10 cm

and both carry equal charge of

75 μC .

If both spheres are shorted then charge will be transferred-

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Alpha Question Bank for Medical: Physics>Chapter 23 - Capacitance>Exercise-1>Q 6

If two isolated charged metallic spheres of radii

R_{1}

and

R_{2}

having charges

Q_{1}

and

Q_{2}

, respectively, are connected to each other, then there is

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Alpha Question Bank for Medical: Physics>Chapter 23 - Capacitance>Exercise-1>Q 7

A parallel plate capacitor is charged and the charging battery is then disconnected. The plates of the capacitor are now moved, farther apart. The following things happen.

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Alpha Question Bank for Medical: Physics>Chapter 23 - Capacitance>Exercise-1>Q 8

A parallel plate capacitor is charged and then isolated. On increasing the plate separation-

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Alpha Question Bank for Medical: Physics>Chapter 23 - Capacitance>Exercise-1>Q 9

The value of one farad in e.s.u. is-

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Alpha Question Bank for Medical: Physics>Chapter 23 - Capacitance>Exercise-1>Q 10

A parallel plate air capacitor is charged to a potential difference of

V

. After disconnecting the battery, the distance between the plates of the capacitor is increased using an insulating handle. As a result, the potential difference between the plates