Question:
In an a.c. circuit with phase voltage V and current
I, the power dissipated is
In an a.c. circuit with phase voltage V and current
I, the power dissipated is
Updated On: Aug 18, 2024
- V.I
- depends on phase angle between V and I
- $\frac{1}{2}\times V.I$
- $\frac{1}{\sqrt2}\times V.I$
Hide Solution
Verified By Collegedunia
The Correct Option is B
Solution and Explanation
The dissipation of power in an a.c. circuit is
$(P)=V\times I \times cos \, \theta$.Therefore current flowing in
the circuit depends upon the phase voltage (V)
and current (I) of the a.c. circuit.
$(P)=V\times I \times cos \, \theta$.Therefore current flowing in
the circuit depends upon the phase voltage (V)
and current (I) of the a.c. circuit.
Was this answer helpful?
0
0
Top Questions on Reactance
- An alternating voltage V = $V_0 \sin \omega t$ is applied across a circuit. As result $I = I_0 \sin(\omega t - \pi /2)$ flows in it. The power consumed per cycle is
- AIIMS - 2013
- Physics
- Reactance
- The reactance of an inductance of $0.01\, H$ to a $50 \,Hz$ A.C. is
- AIIMS - 1995
- Physics
- Reactance
Questions Asked in NEET exam
- Match List I with List II:Choose the correct answer from the options given below:
List I List II A Robert May I Species-Area relationship B Alexander von Humboldt II Long term ecosystem experiment using out door plots C Paul Ehrlich III Global species diversity at about 7 million D David Tilman IV Rivet popper hypothesis - NEET (UG) - 2024
- Species diversity
- Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : The potential (V) at any axial point, at 2 m distance(r) from the centre of the dipole of dipole moment vector \(\vec{P}\) of magnitude, 4 × 10-6 C m, is ± 9 × 103 V.
(Take \(\frac{1}{4\pi\epsilon_0}=9\times10^9\) SI units)
Reason R : \(V=±\frac{2P}{4\pi \epsilon_0r^2}\), where r is the distance of any axial point, situated at 2 m from the centre of the dipole.
In the light of the above statements, choose the correct answer from the options given below :- NEET (UG) - 2024
- Magnetic Field
- Given below are two statements:
Statement I: Mitochondria and chloroplasts both double membranes bound organelles.
Statement II: Inner membrane of mitochondria is relatively less permeable, as compared chloroplast. I
In the light of the above statements, choose the mis appropriate answer from the options given below- NEET (UG) - 2024
- Cell structure and organelles
- Match List I with List II:Choose the correct answer from the options given below:
List I
List II
A Mesozoic Era I Lower invertebrates B Proterozoic Era II Fish & Amphibia C Cenozoic Era III Birds & Reptiles D Paleozoic Era IV Mammals - NEET (UG) - 2024
- Origin Of Life
- A parallel plate capacitor is charged by connecting it to a battery through a resistor. If I is the current in the circuit, then in the gap between the plates :
- NEET (UG) - 2024
- Capacitors and Capacitance
View More Questions
Concepts Used:
Reactance
Reactance is the measure of the opposition of inductance and capacitance to current in an AC circuit which is denoted by X. It varies with the frequency of electrical signals and is measured in ohms.
Types of Reactance:
- Capacitive reactance ( XC), and
- Inductive reactance ( XL ).
The formula of Reactance:
The total reactance (X) is equal to the difference between the two:
Total reactance, X = X
a. Capacitive Reactance (XC) is the reactance, which is large at low frequencies and small at high frequencies.
b. Inductive Reactance, (XL) is the reactance which is small at low frequencies and large at high frequencies.