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Test: Resistance & Capacitance in Series - Electrical Engineering (EE) MCQ


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10 Questions MCQ Test Basic Electrical Technology - Test: Resistance & Capacitance in Series

Test: Resistance & Capacitance in Series for Electrical Engineering (EE) 2024 is part of Basic Electrical Technology preparation. The Test: Resistance & Capacitance in Series questions and answers have been prepared according to the Electrical Engineering (EE) exam syllabus.The Test: Resistance & Capacitance in Series MCQs are made for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Resistance & Capacitance in Series below.
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Test: Resistance & Capacitance in Series - Question 1

 In an RC series circuit ________

Detailed Solution for Test: Resistance & Capacitance in Series - Question 1

In an RC circuit, the applied voltage leads the current in the circuit, hence the applied voltage leads the capacitive voltage.

Test: Resistance & Capacitance in Series - Question 2

 Which, among the following is the correct expression for φ?

Detailed Solution for Test: Resistance & Capacitance in Series - Question 2

Form the impedance triangle, we get tanφ= Xc/R.
Hence φ=tan-1 (Xc/R).

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Test: Resistance & Capacitance in Series - Question 3

For an RC circuit, the phase angle is always ________

Detailed Solution for Test: Resistance & Capacitance in Series - Question 3

For a series resistance and capacitance circuit, the phase angle is always a positive value because the current will always leads the voltage.

Test: Resistance & Capacitance in Series - Question 4

What is φ in terms of voltage?

Detailed Solution for Test: Resistance & Capacitance in Series - Question 4

Form the voltage triangle, we get cosφ= VR/V.
Hence φ=cos-1VR/V.

Test: Resistance & Capacitance in Series - Question 5

An RC network is one which consists of?

Detailed Solution for Test: Resistance & Capacitance in Series - Question 5

An R-C network is a network which consists of a resistor which is connected in series to a capacitor.

Test: Resistance & Capacitance in Series - Question 6

At DC, capacitor acts as?

Detailed Solution for Test: Resistance & Capacitance in Series - Question 6

At DC, the inductor acts as short circuit because the capacitive resistance is infinity. The frequency of a DC circuit is 0. The capacitive resistance=1/(2*pi*f*C). Therefore, if the frequency is 0, the capacitive resistance is infinity and it acts as an open circuit.

Test: Resistance & Capacitance in Series - Question 7

In an RC series circuit, when the switch is closed and the circuit is complete, what is the response?

Detailed Solution for Test: Resistance & Capacitance in Series - Question 7

In an RC series circuit, the response decays with time because according to the equation, there is an exponential decrease in the response.

Test: Resistance & Capacitance in Series - Question 8

 The expression for current in an RC circuit is?

Detailed Solution for Test: Resistance & Capacitance in Series - Question 8

The particular solution of the current equation is zero. Hence, the expression for the current in an RC circuit is:
i=(V/R)e(-t/RC).

Test: Resistance & Capacitance in Series - Question 9

An 8microF capacitor is connected in series with a 0.5 megaohm resistor. The DC voltage supply is 200V. Calculate the initial charging current.

Detailed Solution for Test: Resistance & Capacitance in Series - Question 9

In a series RC circuit, the initial charging current is:
I=V/R= 200/(0.5*106)= 400*10-6 A= 400 microA.

Test: Resistance & Capacitance in Series - Question 10

While discharging, what happens to the current in the capacitive circuit?

Detailed Solution for Test: Resistance & Capacitance in Series - Question 10

The equation for the value of current in a discharging capacitive circuit is:
I=I0*e-t/RC. From this equation, we can see that the current is exponentially decreasing since e is raised to a negative power.

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