Q- An electronic flashgun has a 1000 -µF capacitor that is charged to 100 V.
(a) How much energy is stored by the capacitor?
(b) What is the charge on the capacitor?
(c) When the photographer takes a picture, the flash fires for 1/2000 s. What is the average current through the flashtube?
(d…
Q- Two parallel conducting plates are separated by the distance d, and the potential difference between the plates is maintained at the value V. A slab of dielectric with constant K and a uniform thickness t < d is inserted between the plates and parallel to them. Find the electric field vector E an…
Q- A parallel plate capacitor is having capacitance 50 nF and given a charge of 2µC.
(a) If an electron escapes from the negative plate, how much kinetic energy it will gain while reaching positive plate?
(b) How much energy is stored in the electric field between the plates?
(c) If the plates…
Q- A 2.00-nF capacitor with an initial charge of 5.10 µC is discharged through a 1.30-kW resistor.
(a) Calculate the current in the resistor 9.00 µS after the resistor is connected across the terminals of the capacitor.
(b) What charge remains on the capacitor after 8.00 µS?
(c) What is the m…
(On request - Ravi)
Q- How does the energy stored in a parallel plate capacitor change if:
a) The potential difference is doubled.
b) The separation between the plates is doubled with the capacitor remains connected to the battery.
c) The separation between the plates is doubled after it is disc…
Q- Three capacitors of capacitance C and a resistor R are connected in series. The combination is connected a battery of EMF V and a switch. Initially the capacitors are uncharged. At t = 0 the switch is closed.
a) What is the charge that accumulates on the plate connected to the positive terminal …
Q1- An electric dipole with a dipole moment of 2x10-29 Cm is positioned in an electric field of 5x105 N/C. If the dipole is perpendicular to the field direction calculate the torque experienced by the dipole.
Q2- Two vertical parallel plate electrodes are placed in a container as a liquid-level det…
Q1- A capacitor is made from two hollow, coaxial iron cylinders, one inside the other. The inner cylinder is negatively charged and the outer is positively charged; the magnitude of the charge on each is 10.0 pC. The inner cylinder has a radius of 0.200 mm , the outer one has a radius of 5.40 mm, an…
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