number 18 correct answer displayed An uncharged 1.0 mu F capacitor is connected

Question

number 18 correct answer displayed

An uncharged 1.0 mu F capacitor is connected in series with a 23-k ohm resistor, an ideal 7.0-V battery, and an open switch. What is the voltage across the capacitor 11 ms after closing the switch 0.62 V 1.6 V 2.6 V 2.7 V SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. For the circuit shown in the figure, determine the current in the 7.0- Ohm resistor the 8.0-Ohm resistor the 4.0-Ohm resistor. As shown in the figure, a small particle of charge q = -7.0 Times 10-6 C and mass m = 3.1Times 10-12 kg has velocity v0 = 9.4 Times 103 m/s as it enters a region of uniform magnetic

Explanation / Answer

17)

V = Vo*(1 - e^(-t/RC))

So, V = 7*(1- e^(-11*10^-3/(1*10^-6*23*10^3))) = 2.7 V <-------answer

18)

For the left loop,

12 = (i1 - i2)*4 + i1*7 <------- i1 is the current in left loop and i2 in the right loop

and for right loop,

9 = i2*8 + (i2-i1)*4   

Solving these equations simultaneously,

So, i1 = 1.55 A

and i2 = 1.27 A

So, current in 7 ohm = i1 = 1.55 A

in 8 ohm, = i2 = 1.27 A

in 4 ohm = i1 - i2 = 0.28 A

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