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Test: Bandwidth & Selectivity - Electrical Engineering (EE) MCQ


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20 Questions MCQ Test - Test: Bandwidth & Selectivity

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

The SI unit for bandwidth is?

Detailed Solution for Test: Bandwidth & Selectivity - Question 1

The SI unit for bandwidth is Hz. Hertz is the SI unit because bandwidth is basically frequency and the unit for frequency is Hz.

Test: Bandwidth & Selectivity - Question 2

At bandwidth frequency range, the value of the current I is?

Detailed Solution for Test: Bandwidth & Selectivity - Question 2

At the bandwidth frequency range, the value of the current is equal to the maximum value of current divided by √2.

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Test: Bandwidth & Selectivity - Question 3

At bandwidth frequency range, the value of the voltage V is?

Detailed Solution for Test: Bandwidth & Selectivity - Question 3

At the bandwidth frequency range, the value of the voltage is equal to the maximum value of voltage divided by √2.

Test: Bandwidth & Selectivity - Question 4

At resonance, bandwidth includes the frequency range that allows _____ percent of the maximum current to flow.

Detailed Solution for Test: Bandwidth & Selectivity - Question 4

At resonance, bandwidth includes the frequency range that allows 70.2 percent of the maximum current to flow. This is because at the bandwidth frequency range, the value of the current is equal to the maximum value of current divided by √2.

Test: Bandwidth & Selectivity - Question 5

 At resonance, bandwidth includes the frequency range that allows _____ percent of the maximum voltage to flow.

Detailed Solution for Test: Bandwidth & Selectivity - Question 5

At resonance, bandwidth includes the frequency range that allows 70.2 percent of the maximum voltage to flow. This is because at the bandwidth frequency range, the value of the voltage is equal to the maximum value of voltage divided by √2.

Test: Bandwidth & Selectivity - Question 6

 Find the value of current when the maximum value of current is 50A in the bandwidth range.

Detailed Solution for Test: Bandwidth & Selectivity - Question 6

At the bandwidth frequency range, the value of the current is equal to the maximum value of current divided by √2. Hence I =50/√2= 35.36A.

Test: Bandwidth & Selectivity - Question 7

 Find the value of voltage when the maximum value of voltage is 100V.

Detailed Solution for Test: Bandwidth & Selectivity - Question 7

At the bandwidth frequency range, the value of the voltage is equal to the maximum value of voltage divided by √2. Hence V =100/√2= 70.72V.

Test: Bandwidth & Selectivity - Question 8

If the resonant frequency in a series RLC circuit is 50kHz along with a bandwidth of 5kHz, find the quality factor.

Detailed Solution for Test: Bandwidth & Selectivity - Question 8

We know that Quality factor is equal to the resonant frequency divided by the bandwidth. Substituting the values from the given question, we get Q=10.

Test: Bandwidth & Selectivity - Question 9

What happens to the bandwidth frequency range when the quality factor increases?

Detailed Solution for Test: Bandwidth & Selectivity - Question 9

The bandwidth frequency range decreases as the Q factor increases because the bandwidth is inversely proportional to the Q factor.

Test: Bandwidth & Selectivity - Question 10

Find the bandwidth when the resonant frequency is 50kHz and the Q factor is 10.

Detailed Solution for Test: Bandwidth & Selectivity - Question 10

We know that Quality factor is equal to the resonant frequency divided by the bandwidth. Substituting the values from the given question, we get BW= 5kHz.

Test: Bandwidth & Selectivity - Question 11

Shape of the resonance curve depends upon the?

Detailed Solution for Test: Bandwidth & Selectivity - Question 11

The shape of the resonance curve depends on the Q factor because of the equation:
BW=fr/Q.

Test: Bandwidth & Selectivity - Question 12

 A circuit is said to be selective if it has a _____ peak and ____ bandwidth.

Detailed Solution for Test: Bandwidth & Selectivity - Question 12

A circuit is said to be selective in nature if it has a shape peak with a narrow bandwidth.

Test: Bandwidth & Selectivity - Question 13

What is the Q factor of a selective circuit?

Detailed Solution for Test: Bandwidth & Selectivity - Question 13

A circuit is said to be selective in nature if it has a shape peak with a narrow bandwidth. The sharp peak indicates a high Q factor.

Test: Bandwidth & Selectivity - Question 14

 In selective circuits, higher the Q factor _________ the peak.

Detailed Solution for Test: Bandwidth & Selectivity - Question 14

A circuit is said to be selective in nature if it has a shape peak with a narrow bandwidth. The sharp peak indicates a high Q factor.

Test: Bandwidth & Selectivity - Question 15

Q is a measure of _________

Detailed Solution for Test: Bandwidth & Selectivity - Question 15

 A circuit is said to be selective in nature if it has a shape peak with a narrow bandwidth. The sharp peak indicates a high Q factor.

Test: Bandwidth & Selectivity - Question 16

In selective circuits, the resonant frequency lies in the ________ of the bandwidth frequency range.

Detailed Solution for Test: Bandwidth & Selectivity - Question 16

In selective circuits, the resonant frequency lies in the mid point of the bandwidth frequency range.

Test: Bandwidth & Selectivity - Question 17

 In order for high selectivity, the resistance must be?

Detailed Solution for Test: Bandwidth & Selectivity - Question 17

For high selectivity, the Q factor should be large and for Q factor to be large, the resistance would be small because Q is inversely proportional to the resistance.

Test: Bandwidth & Selectivity - Question 18

What is the frequency in resonance condition?

Detailed Solution for Test: Bandwidth & Selectivity - Question 18

At resonance condition, the frequency is maximum since the inductive reactance is equal to the capacitive reactance and the voltage and current are in phase.

Test: Bandwidth & Selectivity - Question 19

 If the resonant frequency in a series RLC circuit is 50kHz along with a bandwidth of 1kHz, find the quality factor.

Detailed Solution for Test: Bandwidth & Selectivity - Question 19

We know that Quality factor is equal to the resonant frequency divided by the bandwidth. Substituting the values from the given question, we get Q=50.

Test: Bandwidth & Selectivity - Question 20

What happens to the quality factor when the bandwidth increases?

Detailed Solution for Test: Bandwidth & Selectivity - Question 20

We know that Quality factor is equal to the resonant frequency divided by the bandwidth. Hence as the bandwidth increases, quality factor decreases.

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