New chat PYQ Library Doubts Rank report

Sign in to see Recents

Sign in to save progress →

Alternating Current question

2005 · Shift 0 · Q131

Guest · try one question or challengeGuest · try one question or challenge

PYQ Library
JEE Main
Physics
Alternating Current
2005 · Shift 0 · Q131

Alternating Current question

2005 · Shift 0 · Q131

JEE MainPhysicsAlternating CurrentMCQ+4 / −1

A circuit has a resistance of

12ohm

and an impedance of

15ohm

. The power factor of the circuit will be

A
$0.4$
B
$0.8$
C
$0.125$
D
$1.25$

More from Alternating Current

The phase difference between the alternating current and $e m f$ is $\frac{π}{2} .$ Which of the following cannot be the constituent of the circuit?2005 · MCQ
Alternating current can not be measured by $D . C .$ ammeter because2004 · MCQ
In an $L C R$ series $a . c .$ circuit, the voltage across each of the components, $L, C$ and $L . C$ is $50 V$ . The voltage across the $L . C$ combination will be :2004 · MCQ
In a $L C R$ circuit capacitance is changed from $L$ to $2 C$ . For the resonant frequency to remain unchaged, the inductance should be changed from $L$ to2004 · MCQ
In an oscillating $L C$ circuit the maximum charge on the capacitor is $Q$ . The charge on the capacitor when the energy is stored equally between the electric and magnetic field is2003 · MCQ
The core of any transformer is laminated so as to2003 · MCQ
The power factor of $A C$ circuit having resistance $(R)$ and inductance $(L)$ connected in series and an angular velocity $ω$ is2002 · MCQ
In a transformer, number of turns in the primary coil are $140$ and that in the secondary coil are $280.$ If current in primary coil is $4 A,$ then that in the secondary coil is2002 · MCQ