The transfer function

**A. **

**B. **

**C. **

**D. **

**Answer : ****Option D**

**Explaination / Solution: **

For the given capacitance, in the circuit, we have the reactance.

For the given capacitance, in the circuit, we have the reactance.

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Two magnetically uncoupled inductive coils have Q factors q_{1} and q_{2} at the
chosen operating frequency. Their respective resistances are R_{1} and R_{2} . When
connected in series, their effective Q factor at the same operating frequency is

**A. **

**B. **

**C. **

**D. **

**Answer : ****Option C**

**Explaination / Solution: **

No Explaination.

No Explaination.

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The two-port network P shown in the figure has ports 1 and 2, denoted by terminals (a, b) and
(c, d), respectively. It has an impedance matrix Z with parameters denoted by z_{ij}. A 1Ω resistor
is connected in series with the network at port 1 as shown in the figure. The impedance matrix
of the modified two-port network (shown as a dashed box) is

**A. **

**B. **

**C. **

**D. **

**Answer : ****Option C**

**Explaination / Solution: **

No Explaination.

No Explaination.

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In the circuit shown, the switch S is open for a long time and is closed at t = 0. The current i (t) for t ≥ 0^{+}is

When the switch S is open for a long time before t < 0, the circuit is

At t = 0, inductor current does not change simultaneously, So the circuit is

Current is resistor (AB)

i(0) = 0.75/2 = 0.375 A

Similarly for steady state the circuit is as shown below

B = 0.375 - 0.5 =- 0.125

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The L-C circuit shown in the figure has an inductance L = 1mH and a capacitance
C = 10µF.

**A. ** 5cos(5×10^{3}t)A

**B. ** 5sin(10^{4}t)A

**C. ** 10cos(5×10^{3}t)A

**D. ** 10sin(10^{4}t)A

**Answer : ****Option D**

**Explaination / Solution: **

No Explaination.

The initial current through the inductor is zero, while the initial capacitor voltage is 100 V. The switch is closed at t = 0. The current i through the circuit is:

No Explaination.

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The current through the 2 kΩ resistance in the circuit shown is

**A. ** 0mA

**B. ** 1mA

**C. ** 2mA

**D. ** 6mA

**Answer : ****Option A**

**Explaination / Solution: **

It is a balanced Wheatstone bridge.

It is a balanced Wheatstone bridge.

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A network consisting of a finite number of linear resistor (R), inductor (L), and capacitor (C)
elements, connected all in series or all in parallel, is excited with a source of the form

**A. **

**B. **

**C. **

**D. **

**Answer : ****Option A**

**Explaination / Solution: **

The property of any LTI system or network is if the excitation contains „n‟ number of different frequency then the response also contains exactly n number of different frequency term and the output frequency and input frequency must be same however depending on components there is a possible change in amplitude and phase but never the frequency.

The source has nonzero impedance. Which one of the following is a possible form of the
output measured across a resistor in the network?

The property of any LTI system or network is if the excitation contains „n‟ number of different frequency then the response also contains exactly n number of different frequency term and the output frequency and input frequency must be same however depending on components there is a possible change in amplitude and phase but never the frequency.

⟶ If the source has 3 frequency terms as given then any voltage or any current of any element should have also 3 terms based on this option (B) and (D) are eliminated.

⟶ If we take option (C). It has 3 frequency term but it also suggest there is a phase change so ϕ_{k} but amplitude must be same as input as a_{k} is present which may not be true always.

⟶ So option (A) is correct, as it suggest frequency term of output and inputs are same with
possible change in amplitude and phase, because we have (b_{k} and ϕ_{k} ).

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A series RL circuit is excited at t = 0 by closing a switch as shown in the figure.
Assuming zero initial conditions, the value of is

**A. ** V/L

**B. ** -V/R

**C. ** 0

**D. **

**Answer : ****Option D**

**Explaination / Solution: **

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Three capacitors C_{1}, C_{2} and C_{3} whose values are 10 μF , 5 μF , and 2 μF respectively, have breakdown voltages of 10 V, 5 V and 2 V respectively. For the
interconnection shown below, the maximum safe voltage in Volts that can be
applied across the combination, and the corresponding total charge in μC stored
in the effective capacitance across the terminals are respectively

**A. ** 2.8 and 36

**B. ** 7 and 119

**C. ** 2.8 and 32

**D. ** 7 and 80

**Answer : ****Option C**

**Explaination / Solution: **

No Explaination.

No Explaination.

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**Preparation Study Material**- Circuit Theory (Study/Preparation)
- Electromagnetic Theory (Study/Preparation)
- Digital Logic Circuits (Study/Preparation)
- Signals and Systems (Study/Preparation)
- Electrical Machines I (Study/Preparation)
- Electrical Machines II (Study/Preparation)
- Transmission and Distribution (Study/Preparation)
- Power System (Study/Preparation)
- Control Systems (Study/Preparation)
- Digital Logic Circuits (Study/Preparation)
- Electronic Devices and Circuits (Study/Preparation)
- Microprocessors and Microcontrollers (Study/Preparation)
- Power Electronics (Study/Preparation)

- Engineering Mathematics (Practise Test)
- Electric Circuits (Practise Test)
- Electromagnetic Fields (Practise Test)
- Signals and Systems (Practise Test)
- Electrical Machines (Practise Test)
- Power Systems (Practise Test)
- Control Systems (Practise Test)
- Electrical and Electronic Measurements (Practise Test)
- Analog and Digital Electronics (Practise Test)
- Power Electronics (Practise Test)