⇦ | ⇨ |
The instantaneous values of alternating current and voltages in a circuit are given as
i = 1/√2 sin (100πt) amper
e = 1/√2 sin (100πt + π/3) Volt
The average power in Watts consumed in the circuit is:
Options
(a) 1/4
(b) √3 / 4
(c) 1/2
(d) 1/8
Correct Answer:
1/8
Explanation:
The average power in the circuit where cos ? = power factory
= Vᵣₘₛ x Iᵣₘₛ cos ?
? = π/3 = phase difference = 180/3 = 60
Vᵣₘₛ = 1/√2 / √2 = 1/2 volt
Iᵣₘₛ = 1/√2 / √2 = (1/2) A
cos ? = cos π/3 = 1/2
= 1/2 x 1/2 x 1/2 = 1/8 W
Related Questions: - Two bulbs when connected in parallel to a source take 60W each, the power consumed,
- The mean radius of the earth is R, its angular speed on its own axis is ?
- Which component of electromagnetic spectrum have maximum wavelength?
- The work function for metals A,B abd C are respectively 1.92 eV,2.0 eV and 5 eV.
- Calculate the charge on equivalent capacitance of the conbination shown in figure
Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Two bulbs when connected in parallel to a source take 60W each, the power consumed,
- The mean radius of the earth is R, its angular speed on its own axis is ?
- Which component of electromagnetic spectrum have maximum wavelength?
- The work function for metals A,B abd C are respectively 1.92 eV,2.0 eV and 5 eV.
- Calculate the charge on equivalent capacitance of the conbination shown in figure
Topics: Alternating Current (96)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply