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Important questions on Parallel Plate Capacitor

Two parallel plate capacitors are constructed, one by a pair of iron plates and the second by a pair of copper plates of same area and same spacings. Then:

This question has multiple correct options
A
the copper plate capacitor has a greater capacitance than the iron one
B
both capacitors have equal, non-zero capacitances in the uncharged state
C
both capacitors will have equal capacitances only if they are charged equally
D
the capacitances of the two capacitors are equal even if they are unequally charged
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Which of the following devices does not allow d.c. to pass through?

A
Resistor
B
Capacitor
C
Inductor
D
All of these
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The capacity of a parallel plate condenser is inversely proportional to ___________.

A
Area of each plate
B
Dielectric constant
C
Permittivity of medium
D
Distance between two plates
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A parallel plate capacitor is charged. If the plates are pulled apart

A
The capacitance increases
B
The potential difference increases
C
The total charge increases
D
The charge and potential difference remain the same
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One plate of parallel plate capacitor is smaller than the other. The charge on the smaller plate:

A
will be less than other
B
will be more than other
C
will be equal to other
D
will depend upon the medium between the plates 
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Two identical parallel plate capacitors of same dimensions are connected to a D.C. source in series When one of the plates of one capacitor is brought closer to the other plate

A
the voltage on the capacitor whose plates came closer is greater than the voltage on the capacitor whose plates are not moved.
B
the voltage on the capacitor whose plates came closer is smaller than the voltage on the capacitor whose plates are not moved.
C
the voltages on the two capacitors remain equal.
D
the applied voltage is divided equally between the two capacitors
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A parallel plate capacitor is charged and then isolated. What is the effect of increasing the plate separation on charge, potential, capacitance, respectively?

A
Constant, decreases, decreases
B
Increases, decreases, decreases
C
Constant, decreases, increases
D
Constant, increases, decreases
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