SATHEE: Electro Magnetic Induction And Alternating Currents Question 41

Electro Magnetic Induction And Alternating Currents Question 41

Question: The coefficient of induction of a choke coil is 0.1H and resistance is $12, Ω$ . If it is connected to an alternating current source of frequency 60 Hz, then power factor will be [RPET 1997]

Options:

A) 0.32

B) 0.30

C) 0.28

D) 0.24

Show Answer

Answer:

Correct Answer: B

Solution:

$\cos φ = \frac{R}{Z} = \frac{R}{\sqrt{R^{2} + ω^{2} L^{2}}}$ $= \frac{12}{\sqrt{{(12)}^{2} + 4 \times π^{2} \times {(60)}^{2} \times {(0.1)}^{2}}}$
$\Rightarrow \cos φ = 0.30$

Electro Magnetic Induction And Alternating Currents Question 41

Question: The coefficient of induction of a choke coil is 0.1H and resistance is $12, Ω$ . If it is connected to an alternating current source of frequency 60 Hz, then power factor will be [RPET 1997]

Options:

Answer:

Solution:

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Electro Magnetic Induction And Alternating Currents Question 41

Question: The coefficient of induction of a choke coil is 0.1H and resistance is 12,Ω . If it is connected to an alternating current source of frequency 60 Hz, then power factor will be [RPET 1997]

Options:

Answer:

Solution:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

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Question: The coefficient of induction of a choke coil is 0.1H and resistance is $12, Ω$ . If it is connected to an alternating current source of frequency 60 Hz, then power factor will be [RPET 1997]