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Electric Circuits
A capacitor charged from a 50V DC supply is discharged across a charge-measuring instrument and found to have carried a charge of 10uC. What is the capacitance of the capacitor and how much energy was stored in it?
Electric Circuits
In one camera, the resistance of the bulb is 0.1 Ω, and the capacitor has a value of 4700 μF. How long will it take to discharge the capacitor to just 5% of its original voltage?
Electric Circuits
Explain resitivity in simple words
Electric Circuits
A capacitor with a value of 2uF at 25°C has a positive temperature coefficient of 50 ppm/°C. What is the capacitance value when the temperature increase to 125°C ?
Electric Circuits
A transisitor is voltage operating device
Select one:
True
False
Electric Circuits
A capacitor charged from a 50V DC supply is discharged across a charge-measuring instrument and found to have carried a charge of 10uC. What is the capacitance of the capacitor and how much energy was stored in it?
Electric Circuits
Give one practical example of the use of a capacitor, explaining how the properties of the capacitors are utilized in the example you choose.
Electric Circuits
Give a brief qualitative explanation based on the behavior of molecules, for the change in capacitance of a capacitor when the space between its plates is filled with a dielectric.
Electric Circuits
Two capacitors of capacitance 2.0uF and 4.0uF respectively, are each given a charge of 120uC. The positive plates are now connected together, so too are the negative plates. Calculate the new potential difference between the plates of the capacitors. Calculation shows that the total energy stored by the capacitors has decreased. Explain this change in energy.
Electric Circuits
Two capacitors of capacitance 2.0uF and 4.0uF respectively, are each given a charge of 120uC. The positive plates are now connected together, so too are the negative plates. Calculate the new potential difference between the plates of the capacitors.
