IA. V = VR+VL+VC
B. V2 = VR2+VL2+VC2
C. V2 = VR2+(VL-VC)2
D. V2 = VL2+(VR-VC)2
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Related Mcqs:
- 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___________?
A. V√/√2R
B. V/√2√R
C. V02/√2R
D. 2/√2√R - An A.C series circuit containing 4Ω resistance and 3Ω inductive reactance. The impedance of the circuit is______________?
A. 1Ω
B. 5Ω
C. 7Ω
D. 7Ω - If the volume of a gas is held constant and we increase its temperature then_______________?
A. its pressure is constant
B. its pressure rises
C. its pressure falls
D. any of above - At resonance the value of the power factor in an L-C-R series circuit is_______________?
A. Zero
B. 2
C. 1
D. Not definite - 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 ?
A. 10mH
B. 12mH
C. 16mH
D. 20mH - If capacitance of L-C circuit is made four times then frequency of the circuit becomes___________________?
A. Twice
B. One half
C. Four times
D. None - pure resistor circuit the voltage and current are_______________?
A. Lagging each other
B. They are at 90? phase difference
C. They have zero phase difference
D. No phase difference - The phase angle between the voltage and the current in an AC circuit consisting of a resistance is______________?
A. Zero
B. 45°
C. 90°
D. 180° - Three equal resistors connected in series with a source of e m f together dissipate 10 W of power each. What will be the power dissipated if the same resistors are connected in parallel across the same source of e m f ?
A. 40 W
B. 90W
C. 100W
D. 120W - Three bulbs are rating 40W 60W and 100W designed to work on 220V mains. Which bulb will burn most brightly if they are connected in series across 220 V mains ?
A. 40 W bulb
B. 60 W blub
C. 100 W blub
D. all will burn equally brightly
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