A choke is used as a resistance in_________________? April 17, 2025 by admin A. DC circuit B. AC circuits C. Both AC and DC circuit D. Full wave rectifier circuit
At resonance the value of the power factor in an L-C-R series circuit is_______________? April 17, 2025 by admin A. Zero B. 2 C. 1 D. Not definite
An A.C series circuit containing 4Ω resistance and 3Ω inductive reactance. The impedance of the circuit is______________? April 17, 2025 by admin A. 1Ω B. 5Ω C. 7Ω D. 7Ω
An inductive coil has a resistance of 100Ω. When an AC signal of frequency 1000Hz is fed to the coil the applied voltage leads the current by 45Ω. What is the inductance of the coil ? April 17, 2025 by admin A. 10mH B. 12mH C. 16mH D. 20mH
Choose the correct statement. In the case of AC circuit ohms law holds for_______________? April 17, 2025 by admin A. Peak values of voltage and current B. Effective values of voltage and current C. Instantaneous values of voltage and current D. All of the above
The phase angle between the voltage and the current in an AC circuit consisting of a resistance is______________? April 17, 2025 by admin A. Zero B. 45° C. 90° D. 180°
n an LCR series circuit, if V is the effective value of the applied voltage VR is the voltage across R VL is the effective voltage across L & Vc is the effective voltage across C then_______________? April 17, 2025 by admin A. V = VR+VL+VC B. V2 = VR2+VL2+VC2 C. V2 = VR2+(VL-VC)2 D. V2 = VL2+(VR-VC)2
A voltage V = V0 cos ωt is applied across a resistor of resistance R the average power dissipated per cycle in the resistor is given by___________? April 17, 2025 by admin A. V√/√2R B. V/√2√R C. V02/√2R D. 2/√2√R
Two identical coaxial circular loops carry equal currents in the same direction. If the loops approach each other the current in______________? April 17, 2025 by admin A. Each increase B. Each decrease C. Each remains the same D. One increases whereas that in the other decreases
An inductor may store energy in ________________? April 17, 2025 by admin A. Its electric field B. Its coils C. Its magnetic field D. Both electric and magnetic fields
