A 160 − μ F capacitor charged to 450 V is dischargedthrough a 31.2 − k Ω resistor, (a) Find the time constant.(b)Calculate the temperature increase of the resistor, given that its mass is 2.50 g and its specific heat is 1.67 k J / k g °C,noting that most of the thermal energy is retained in the short time of the discharge, (c) Calculate the new resistance, assuming it is pure carbon. (d) Does this change in resistance seem significant?
A 160 − μ F capacitor charged to 450 V is dischargedthrough a 31.2 − k Ω resistor, (a) Find the time constant.(b)Calculate the temperature increase of the resistor, given that its mass is 2.50 g and its specific heat is 1.67 k J / k g °C,noting that most of the thermal energy is retained in the short time of the discharge, (c) Calculate the new resistance, assuming it is pure carbon. (d) Does this change in resistance seem significant?
A
160
−
μ
F
capacitor charged to 450 V is dischargedthrough a
31.2
−
k
Ω
resistor, (a) Find the time constant.(b)Calculate the temperature increase of the resistor, given that its mass is 2.50 g and its specific heat is
1.67
k
J
/
k
g
°C,noting that most of the thermal energy is retained in the short time of the discharge, (c) Calculate the new resistance, assuming it is pure carbon. (d) Does this change in resistance seem significant?
A 160-µF capacitor charged to 450 V is discharged through
a 31.2-k 2 resistor. (a) Find the time constant. (b)
Calculate the temperature increase of the resistor, given that
its mass is 2.50 g and its specific heat is 1.67, k
´kg · °C'
noting that most of the thermal energy is retained in the short
time of the discharge. (c) Calculate the new resistance,
assuming it is pure carbon. (d) Does this change in resistance
seem significant?
A 205-kV power transmission line carrying 500 A is hung from grounded
metal towers by ceramic insulators, each having a 1.40 x 109 2 resistance.
(a) What is the resistance to ground of 70 of these insulators? (Assume
the insulators are connected in parallel.)
Ω
(b) Calculate the power dissipated by 70 of them.
W
(c) What fraction of the power carried by the line is this?
Ptotal
(!) THE FOLLOWING QUESTIONS ARE BASED ON THE INFORMATION GIVEN HERE.
R
ww
The emf source, E
R, = 5.6 N. The capacitor has a capacitance C = 3.7 µF.
2.1 V, of the circuit shown in the figure has negligible internal resistance. The resistors have resistances R, = 2.6N and
3.
R1
A) Determine the time constant T, in units of microseconds for charging the capacitor.
Answer:
B) What is the charge Q on the capacitor in units of microcoulomb?
Answer.
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DC Series circuits explained - The basics working principle; Author: The Engineering Mindset;https://www.youtube.com/watch?v=VV6tZ3Aqfuc;License: Standard YouTube License, CC-BY