here ,
R = 760 Ohm
C = 4.76 uF
Q = 9 mC
Now , energy stored in cacacitor
U0 = 0.5 Q^2/C
U0 = 0.5 * (0.009)^2/(4.76 *10^-6)
U0 = 8.5 J
the energy initially stored in the capacitor is 8.5 J
B)
as V = Q/C
V = 0.009/4.76 *10^-6
V =1890.8 V
Power = V^2/R
Power = 1890.8^2/(760)
Power = 4703.9 W
the power dissipated in resistor is 4703.9 W
C)
For half value of energy ,
V = V/sqrt(2)
V = 1890.8/sqrt(2)
V = 1336.8 V
Now ,
Power = V^2/R
Power = 1336.8^2/760
Power = 2351.4 W
the power dissipated is 2351.4 W
Problem 26.84 A resistor with 760 omega is connected to the plates of a charged capacitor...
A 2.36-uF capacitor that is initially uncharged is connected in series with a 5.86-2 resistor and an emf source with E = 120 V and negligible internal resistance. (a) Just after the connection is made, what are (i) the rate at which electrical energy is being dissipated in the resistor; () the rate at which the electrical energy stored in the capacitor is increasing: (ii) the electrical power output of the source? How do the answers to parts (i), (),...
A 2.01 μFμF capacitor that is initially uncharged is connected in series with a 6.51 kΩkΩ resistor and an emf source with 74.6 VV and negligible internal resistance. The circuit is completed at tt = 0. Just after the circuit is completed, what is the rate at which electrical energy is being dissipated in the resistor? At what value of tt is the rate at which electrical energy is being dissipated in the resistor equal to the rate at which...
When an initially uncharged capacitor is charged through a 25 - k omega resistor by a 75, V de ideal power source, it takes 0.23 ms for the capacitor to reach 50% of its maximum charge? What is the capacitance of this capacitor?
A parallel-plate vacuum capacitor is connected to a battery and charged until the stored electric energy is U. The
battery is removed, and then a dielectric material with dielectric
constant K is inserted
into the capacitor, filling the space between the plates. Finally,
the capacitor is fully discharged through a resistor (which is
connected across the capacitor terminals).A.)Find Ur, the
the energy dissipated in the resistor.Express your answer in terms
of U and other
given quantities.B.) Consider the same situation...
A 4900 Ω resistor is connected across a charged 0.780 nF capacitor. The initial current through the resistor, just after the connection is made, is measured to be 0.265 A . a.What magnitude of charge was initially on each plate of this capacitor? b. How long after the connection is made will it take before the charge is reduced to 1e of its maximum value?
A capacitor that is initially uncharged is connected in series with a resistor and an emf of source epsilon = 100 V and negligible internal resistance. Just after the circuit is completed, the current through the resistor is 7.1 x 10^-3 A. the time constant for the circuit is 6.0 s. What is the resistance of the resistor? _____ Ohm What is the capacitance of the capacitor __________ MuF
A charged capacitor is connected to a resistor and switch, all in series. The circuit has a time constant T = 1.80 s. Soon after the switch is closed, the charge on the capacitor is 65.0% of its initial charge qu = 100°C. a) Find the time interval required for the capacitor to reach this charge. b) If R = 210 22, what is the value of C? c) What is the current when the charge on the capacitor is...
L-C Oscillations. A capacitor with capacitance 5.50 ✕ 10-5 F is charged by connecting it to a 12.0 V battery. The capacitor is disconnected from the battery and connected across an inductor with L = 1.55 H. (a) What are the angular frequency ω of the electrical oscillations and the period of these oscillations (the time for one oscillation)? _______________ rad/s _______________ s (b) What is the initial charge on the capacitor? ________________ C (c) How much energy is initially...
THQ-1 (5-points) An initially charged capacitor is discharged through a resistor: C a) Will the capacitor discharge faster or slower if the resistance is increased (using the same amount of initial charge)? b) Will the capacitor discharge faster or slower if the capacitance is increased (using the same amount of initial charge)? c) As the capacitor discharges, does the magnitude of the current through the resistor increase or decrease in time? d) As the capacitor discharges, what is the magnitude...
QUESTION 5 A capacitor is fully charged by a battery. When the capacitor is still connected to the battery, the distance between the two plates decreases. Which of the followings will remain the same? Select all that apply. (a) voltage across the capacitor (b) capacitance (c) charge stored in the capacitor (d) electric field between the two plates (e) electric potential energy stored in the capacitor QUESTION 6 A capacitor is fully charged by a battery. When the capacitor is...