Alpha Question Bank for Medical: Physics>Chapter 23 - Capacitance>Exercise-1>Q 147

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An insulator plate is passed between the plates of a capacitor. Then current

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Important Questions on Capacitance

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Alpha Question Bank for Medical: Physics>Chapter 23 - Capacitance>Exercise-1>Q 148

A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor

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Alpha Question Bank for Medical: Physics>Chapter 23 - Capacitance>Exercise-1>Q 149

In the adjoining diagram, two geometrically identical capacitors $A$ and $B$ are connected to a battery. Air is filled between the plates of $C_{1}$ and a dielectric is filled between the plates of $C_{2},$ then

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Alpha Question Bank for Medical: Physics>Chapter 23 - Capacitance>Exercise-1>Q 150

The electric field between two parallel plates of a capacitor is

2.1 \times 10^{- 5} {NC}^{- 1}

. If a medium is inserted between the plates than the electric field becomes

10 \times 10^{- 5} {NC}^{- 1}

. Now, the value of dielectric will be

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Alpha Question Bank for Medical: Physics>Chapter 23 - Capacitance>Exercise-1>Q 151

The capacity of a parallel plate condenser without any dielectric is

C

. If the distance between the plates is doubled and the space between the plates is filled with a substance of dielectric constant

3

, the capacity of then condenser becomes:

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

A quantity

X

is given by

ε_{0} L \frac{Δ V}{Δ t}

, where

ε_{0}

is the permittivity of the free space,

L

is the length,

Δ V

is the potential difference and

Δ t

is the time interval. The dimensional formula of

X

is same as that of

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

When a current flows through a conductor, its temperature

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Alpha Question Bank for Medical: Physics>Chapter 23 - Capacitance>Exercise-2>Q 3

The electric current passes through a metallic wire produces heat because of

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Alpha Question Bank for Medical: Physics>Chapter 23 - Capacitance>Exercise-2>Q 4

The dimensions of

(\frac{1}{2}) ε_{0} E^{2}

(

ε_{0} :

permittivity of free space,

E

: electric field) is