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akch2002, Engineer
Category: Homework
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# The tuned circuit of FIGURE 3 has a Q-factor of 1000 and is

The tuned circuit of FIGURE 3 has a Q-factor of 1000 and is designed to
resonate at 1 MHz. At resonance the supply current, I, is measured as
15 μA for a supply voltage, Vs, of 2.5 V. The load resistor RL is 10 kΩ.
(a) Calculate the bandwidth and half-power frequencies of the tuned
circuit.
(b) If C is set to 1 nF calculate the values of R and L.
(c) Estimate the impedance offered to the supply at resonance and at the
frequencies of ± 2% from resonance (use a ‘narrow-band’
approximation to find the impedance of the L-RC circuit).
Hi,

Thanks for asking. Could you please attach the figure referred to in the question?

Regards
Customer: replied 4 years ago.

Hi,

which sites can i use

Image came through. I'd review it and let you know.
Customer: replied 4 years ago.
Hi have you answered the question as it state waiting for my response
Hi,

Apologize for the dealy, as I've been travelling and out of station. I'd opt out for time being and open this to others.

Regards
If you wish, I can reply this question. I am asking you as you didn't upload figure in the other thread where I had shown intention to solve this problem.
Customer: replied 4 years ago.

Hi Akch,

Thanks. I will to reply it today.
word file
Kindly ACCEPT the answers. BONUS and POSITIVE feedback will be appreciated.
akch2002, Engineer
Category: Homework
Satisfied Customers: 3099
Experience: Home work expert
Kindly ask if you require any clarification.
Customer: replied 4 years ago.

FIGURE 5 shows an ideal autotransformer (k = 1 and no power losses). (a) Apply Kirchhoff’s laws to write down two equations to express the voltages V1 and V2 in terms of the self and mutual voltages induced across the two coils. (b) Hence obtain an expression for the voltage ratio V1 for the condition V2 L1 = 4L2. (c) Determine the supply voltage and current with a 10 Ω load carrying 100 A and L1 = 4L2.

Customer: replied 4 years ago.

Can you let me know if this has worked, thanks.

Thanks. I have got the figure and will try to reply asap.
Customer: replied 4 years ago.

Good news, thank you.

Welcome
I will try to reply today. Thanks.
word file
Kindly rate the answers. BONUS will be appreciated.
akch2002, Engineer
Category: Homework
Satisfied Customers: 3099
Experience: Home work expert
Customer: replied 4 years ago.

Hi, in part (b) can you show me more detail/working out on how you got to jwL2(9I1-3I2) please. I folloe the I parts but how did you eliminate the rest. Thanks

Here it is 11.30PM now. I will reply tomorrow.

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Customer: replied 4 years ago.

thanks for the explanation.

For V1: i understand the inclusion of L1, K - mutual inductance, L2 but dont understand where the last part of the equation (jwMI1 - mutual inductance) comes from.

Also for V2: why is the RL not taken into account?

Thanks

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