Concept explainers
(a)
The charge on the capacitor.
(a)
Answer to Problem 75GP
The charge on the capacitor is
Explanation of Solution
Given info:
Plate area is
Air gap separation is
Voltage across the plate is
Formula used:
The charge on the capacitor is,
Here,
Calculation:
Substituting the given values,
Conclusion:
Thus, the charge on the capacitor is
(b)
The charge on the capacitor if plates are now pulled to a separation of
(b)
Answer to Problem 75GP
The charge on the capacitor is
Explanation of Solution
Given info:
Plate area is
Air gap separation is
Voltage across the plate is
Formula used:
The capacitance is,
Here,
Calculation:
Substituting the given values
But the plate separation does not affect the charge stored as it is conserved.
Conclusion:
Thus, the charge on the capacitor is
(c)
The potential difference across the plate.
(c)
Answer to Problem 75GP
The potential difference across the plate is
Explanation of Solution
Given info:
Charge is
The capacitance is
Formula used:
The potential difference across the plate is,
Calculation:
Substituting the given values
Conclusion:
Thus, the potential difference across the plate is
(d)
The work required to pull the plates to their new separation.
(d)
Answer to Problem 75GP
The work done in separating the plates is
Explanation of Solution
Given info:
Charge is
Voltage across the plate is
The potential difference across the plate is
Formula used:
The work done in separating the plates is,
Calculation:
Substituting the given values,
Conclusion:
Thus, the work done in separating the plates is
Chapter 17 Solutions
Physics: Principles with Applications
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