In FIGURE, what is the current supplied by the emf when

(a) the frequency is very small and

(b) the frequency is very large

Short Answer

Expert verified

(a) The current supplied by the emf when frequency is very small is 0.10A.

(b) The current supplied by the emf when frequency is very large is0.20A.

Step by step solution

01

Part (a) Step 1  : Given information

We are given that the values of

R1=100ΩR2=50Ωεo=10V

And We have to find the current supplied by emf when the frequency is very small .

02

Part (a) Step 2: Explanation 

When the frequency is very small then the branch with inductor has a very small XL

so

We get,localid="1649933493454" Z=R1I=10100I=0.10A

Hence the current is0.10A.

03

Part (b) Step 1: Given information

We are given that the values of R1=100Ω{"x":[[4,4,5,16,24,28,21,4,4,5,33],[44,51,52,52],[89,115],[89,116],[162,177,178,178],[199,186,184,184,189,203,212,213,213,209,199],[233,221,219,220,227,238,247,248,247,245,233],[266.5,266.5,268.5,270.5,272.5,273.5,274.5,276.5,278.5,279.5,281.5,281.5,282.5,283.5,284.5,284.5,284.5,284.5,284.5,284.5,284.5,284.5,283.5,282.5,280.5,279.5,278.5,278.5,277.5,276.5,276.5,276.5,276.5,277.5,278.5,278.5,279.5,279.5,280.5,282.5,283.5,289.5,296.5,301.5,303.5,305.5,306.5,308.5,310.5,311.5,314.5,316.5,319.5,321.5,322.5,325.5,325.5,326.5,326.5,327.5,328.5,329.5,329.5,330.5,330.5,330.5,330.5,330.5,330.5,329.5,327.5,327.5,326.5,325.5,325.5,325.5,325.5,325.5,325.5,325.5,325.5,325.5,325.5,325.5,325.5,326.5,330.5,334.5,337.5,342.5,346.5,351.5,356.5,359.5,361.5,361.5,361.5,362.5]],"y":[[116,9,9,13,24,38,55,61,61,61,116],[101,90,91,142],[74,74],[93,93],[31,9,10,115],[117,111,66,30,11,9,18,65,97,114,117],[116,113,63,19,9,9,21,55,94,113,117],[119.89999389648438,119.89999389648438,118.89999389648438,116.89999389648438,116.89999389648438,115.89999389648438,115.89999389648438,111.89999389648438,107.89999389648438,105.89999389648438,103.89999389648438,100.89999389648438,99.89999389648438,95.89999389648438,89.89999389648438,86.89999389648438,83.89999389648438,82.89999389648438,81.89999389648438,80.89999389648438,76.89999389648438,72.89999389648438,65.89999389648438,59.899993896484375,52.899993896484375,48.899993896484375,45.899993896484375,43.899993896484375,38.899993896484375,33.899993896484375,23.899993896484375,19.899993896484375,15.899993896484375,10.899993896484375,8.899993896484375,6.899993896484375,3.899993896484375,3.899993896484375,2.899993896484375,0.899993896484375,-0.100006103515625,-4.100006103515625,-5.100006103515625,-7.100006103515625,-8.100006103515625,-8.100006103515625,-8.100006103515625,-8.100006103515625,-8.100006103515625,-8.100006103515625,-6.100006103515625,-4.100006103515625,-2.100006103515625,0.899993896484375,3.899993896484375,7.899993896484375,10.899993896484375,13.899993896484375,17.899993896484375,21.899993896484375,27.899993896484375,30.899993896484375,34.899993896484375,37.899993896484375,38.899993896484375,39.899993896484375,47.899993896484375,54.899993896484375,59.899993896484375,66.89999389648438,71.89999389648438,75.89999389648438,79.89999389648438,83.89999389648438,87.89999389648438,91.89999389648438,95.89999389648438,98.89999389648438,102.89999389648438,103.89999389648438,103.89999389648438,104.89999389648438,105.89999389648438,106.89999389648438,107.89999389648438,109.89999389648438,111.89999389648438,112.89999389648438,113.89999389648438,113.89999389648438,113.89999389648438,112.89999389648438,110.89999389648438,109.89999389648438,108.89999389648438,107.89999389648438,107.89999389648438,107.89999389648438]],"t":[[0,0,0,0,0,0,0,0,0,0,0],[0,0,0,0],[0,0],[0,0],[0,0,0,0],[0,0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0,0],[1649932984453,1649932984708,1649932984718,1649932984734,1649932984751,1649932984767,1649932984784,1649932984801,1649932984817,1649932984834,1649932984851,1649932984867,1649932984884,1649932984900,1649932984917,1649932984934,1649932984951,1649932984967,1649932984984,1649932985001,1649932985017,1649932985034,1649932985050,1649932985067,1649932985084,1649932985100,1649932985117,1649932985134,1649932985151,1649932985168,1649932985184,1649932985200,1649932985217,1649932985234,1649932985251,1649932985267,1649932985284,1649932985301,1649932985325,1649932985339,1649932985351,1649932985368,1649932985385,1649932985401,1649932985417,1649932985434,1649932985451,1649932985467,1649932985484,1649932985500,1649932985517,1649932985533,1649932985551,1649932985567,1649932985584,1649932985600,1649932985617,1649932985634,1649932985650,1649932985667,1649932985685,1649932985700,1649932985717,1649932985733,1649932985750,1649932985767,1649932985784,1649932985800,1649932985817,1649932985834,1649932985851,1649932985867,1649932985884,1649932985900,1649932985917,1649932985934,1649932985950,1649932985967,1649932985985,1649932986000,1649932986017,1649932986034,1649932986054,1649932986069,1649932986084,1649932986102,1649932986117,1649932986133,1649932986150,1649932986167,1649932986184,1649932986200,1649932986217,1649932986233,1649932986250,1649932986267,1649932986364,1649932986370]],"version":"2.0.0"},R2=50Ω{"x":[[4,4,5,16,24,28,21,4,4,5,33],[45,45,50,57,59,55,49,44,44,59],[104,130],[104,131],[207,179,179,178,179,188,200,206,207,206,201,182,177],[229,216,214,214,219,233,242,243,243,239,229],[255,257,263,266,267,268,269,270,271,271,271,271,271,271,271,269,268,267,267,267,266,266,266,267,269,271,274,276,278,279,280,281,287,291,293,298,300,303,304,304,307,308,311,312,312,312,312,312,312,312,312,312,311,311,311,311,311,311,311,311,311,311,312,312,312,313,314,315,316,319,320,321,322,327,330,332,333,334,334,335,337,338]],"y":[[116,9,9,13,24,38,55,61,61,61,116],[102,95,91,93,100,112,129,144,144,144],[74,74],[93,93],[9,9,9,51,51,48,51,63,88,107,116,116,97],[117,111,66,30,11,9,18,65,97,114,117],[120.89999389648438,118.89999389648438,112.89999389648438,109.89999389648438,107.89999389648438,105.89999389648438,102.89999389648438,98.89999389648438,92.89999389648438,88.89999389648438,84.89999389648438,81.89999389648438,79.89999389648438,73.89999389648438,64.89999389648438,45.899993896484375,34.899993896484375,25.899993896484375,20.899993896484375,17.899993896484375,15.899993896484375,12.899993896484375,8.899993896484375,3.899993896484375,-2.100006103515625,-6.100006103515625,-10.100006103515625,-13.100006103515625,-14.100006103515625,-14.100006103515625,-14.100006103515625,-14.100006103515625,-14.100006103515625,-14.100006103515625,-12.100006103515625,-11.100006103515625,-8.100006103515625,-6.100006103515625,-5.100006103515625,-3.100006103515625,1.899993896484375,8.899993896484375,14.899993896484375,20.899993896484375,25.899993896484375,34.899993896484375,45.899993896484375,52.899993896484375,58.899993896484375,64.89999389648438,68.89999389648438,74.89999389648438,77.89999389648438,81.89999389648438,83.89999389648438,84.89999389648438,88.89999389648438,90.89999389648438,92.89999389648438,95.89999389648438,96.89999389648438,98.89999389648438,98.89999389648438,100.89999389648438,100.89999389648438,101.89999389648438,102.89999389648438,102.89999389648438,104.89999389648438,105.89999389648438,107.89999389648438,107.89999389648438,107.89999389648438,107.89999389648438,107.89999389648438,107.89999389648438,106.89999389648438,106.89999389648438,105.89999389648438,104.89999389648438,104.89999389648438,104.89999389648438]],"t":[[0,0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0],[0,0],[0,0,0,0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0,0],[1649933007522,1649933007740,1649933007762,1649933007779,1649933007795,1649933007812,1649933007828,1649933007846,1649933007862,1649933007879,1649933007894,1649933007912,1649933007928,1649933007946,1649933007962,1649933007979,1649933007995,1649933008010,1649933008028,1649933008045,1649933008062,1649933008079,1649933008095,1649933008112,1649933008127,1649933008146,1649933008162,1649933008179,1649933008195,1649933008212,1649933008230,1649933008245,1649933008262,1649933008279,1649933008295,1649933008312,1649933008328,1649933008345,1649933008362,1649933008379,1649933008395,1649933008410,1649933008427,1649933008445,1649933008462,1649933008478,1649933008495,1649933008511,1649933008528,1649933008545,1649933008562,1649933008579,1649933008595,1649933008612,1649933008628,1649933008645,1649933008674,1649933008693,1649933008710,1649933008726,1649933008742,1649933008763,1649933008776,1649933008793,1649933008809,1649933008826,1649933008842,1649933008860,1649933008877,1649933008892,1649933008909,1649933008926,1649933008942,1649933008993,1649933009009,1649933009026,1649933009109,1649933009148,1649933009159,1649933009177,1649933009200,1649933009209]],"version":"2.0.0"},localid="1650185571185" εo=10V

and we have to find the current supplied by emf when the frequency is very large .

04

Part (b) Step 2: Explanation

When the frequency is very large then the branch with capacitor has a very small

so Z=R2

Irms=1050Irms=0.20AOn solving we get,

Hence the current is 0.20A.

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Most popular questions from this chapter

FIGURE Q32.1shows emf phasors a, b, and c.

a. For each, what is the instantaneous value of the emf?

b. At this instant, is the magnitude of each emf increasing, decreasing, or holding constant?

a. Show that the average power loss in a series RLC circuit is

Pavg=ω2εrms2Rω2R2+L2ω2-ωo22

b. Prove that the energy dissipation is a maximum atω=ωo.

A low-pass RC filter has a crossover frequency fc=200 Hz.What is fc if:

a. The resistance R is doubled?

b. The capacitance C is doubled?

c. The peak emf E0 is doubled?

The peak current through an inductor is 10mA. What is the peak current if

a. The emf frequency is doubled?

b. The emf peak voltage is doubled (at the original frequency)

A series RLC circuit consists of a 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a 2.1mH inductor, and a 550nF capacitor. It is connected to a 50V rms oscillating voltage source with an adjustable frequency. An oscillating magnetic field is observed at a point 2.5mm from the center of one of the circuit wires, which is long and straight. What is the maximum magnetic field amplitude that can be generated?

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