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Conductors and Insulators
Conductors and Insulators
6 Mins
Physics
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REVISE WITH CONCEPTS
Conductors and Insulators (Dielectric) , Free and Bound Charges
Example
Definitions
Formulaes
Conductors and Insulators
Example
Definitions
Formulaes
Conduction - In form of Energy
Example
Definitions
Formulaes
Applications of Conductors and Insulators
Example
Definitions
Formulaes
Conductors And Insulators- Medium
Example
Definitions
Formulaes
Electrical Conductors and Insulators
Example
Definitions
Formulaes
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QUICK SUMMARY WITH STORIES
Conductors and Insulators
2 mins read
Introduction to Dielectrics
3 mins read
Conduction - in form of Energy
3 mins read
Conductors and insulators of heat
3 mins read
Conduction
2 mins read
Application of Trapped Air as Insulator
2 mins read
Important Questions
A spherical capacitor consists of two concentric spherical conductors, held in position by suitable insulating supports (Fig.). Show that the capacitance of a spherical capacitor is given by
$c=r_{1}−r_{2}4πϵ_{0}r_{1}r_{2} $
where
$r_{1}$
and
$r_{2}$
are the radii of outer and inner spheres, respectively.
Hard
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>
A capacitor of capacitance
$C_{1}=1μF$
withstand the maximum voltage
$V_{1}=6.0kV$
while the capacitor of capacitance
$C_{2}=2μF$
, the maximum voltage
$V_{2}=4.0kV$
. What voltage in Kilo Volt will the system of these two capacitors withstand if they are connected in series?
Medium
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>
A parallel plate capacitor has
$1μF$
capacitance. One of its two plates is given
$+2μC$
charge and the other plate,
$+4μC$
charge. The potential difference developed across the capacitor is :-
Medium
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>
Define capacitance of a capacitor and its SI unit.
Medium
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>
Derive an expression for the effective capacitance when capacitors are connected
Medium
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>
In the given circuit, the charge on
$4μF$
capacitor will be :
Medium
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>
A metal plate is introduces between the plates of a charged parallel plate capacitor. What is its effect on the capacitance of the capacitor
Medium
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>
A spherical capacitor has an inner sphere of radius 12 cm and an outer sphere of radius 13 cm. The outer sphere is earthed and the inner sphere is given a charge of
$2.5μC$
. The space between the concentric spheres is filled with a liquid of dielectric constant 32.
(a) Determine the capacitance of the capacitor.
(b) What is the potential of the inner sphere?
(c)
Compare the capacitance of this capacitor with that of an isolated sphere of radius 12 cm. Explain why the latter is much smaller.
Hard
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In a circuit shown in figure, the potential difference across the capacitor of
$2μF$
is
Medium
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>
Name the particles which are responsible for the flow of current in a metal.
Easy
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>