When A.C current passes through a capacitor then the current relationship will be_______________? April 17, 2025 by admin A. The current lead voltage by phase angle is 90 degrees B. The voltage leads current by phase angle is 90 degrees C. The current lead voltage by phase angle is 45 degrees D. The voltage leads current by phase angle is 45…
In the capacitive circuit the current___________________? April 17, 2025 by admin A. Lags behind voltage by π/2 B. Is in phase with voltage C. Opposite in phase of voltage by π D. Leads forward the voltage by π/2
A 100µF capacitor with a 12V source in series having frequency 50Hz will offer a capacitive reactance of about______________? April 17, 2025 by admin A. 32Ω B. 62Ω C. 50Ω D. 100Ω
If a glass plate is inserted in between the plate of a capacitor in series with a lighted bulb the brightness of the bulb________________? April 17, 2025 by admin A. Remains same B. Brightness increases C. Brightness decreases D. No light
A wire of resistance R is coiled inductively so that its inductance is L. The impedance of the coil at a frequency of f is_______________? April 17, 2025 by admin A. (R+2πfL) B. R+1/2πfL C. (R2+f2L2) D. (R2+4π2f2L2)
Ammeter connected in an AC circuit measures______________? April 17, 2025 by admin A. The exact value of the current B. RMS value of the current C. The net value of the current D. The peak value of the current
When a pure inductor of inductance L and a pure capacitor of capacitance C are connected in parallel to a sinusoidal potential difference V the potential difference across both L & C will be_______________? April 17, 2025 by admin A. Same B. Different C. At L will be more than at C D. At L will be less than at C
What is the self-inductance of a coil in which an induced emf of 2V is set up when the current changes at the rate of 4 As-1 ? April 17, 2025 by admin A. 0.5 mH B. 0.5H C. 2.0H D. 8.0H
The frequency of a circuit consisting of a capacitance C and a resistor R is________________? April 17, 2025 by admin A. C/R B. R/C C. 1/RC D. 1/ 2RC
A 10Ω electric heater is connected to a 220V 50Hz mains supply. What is the peak value of the potential difference across the heater element ? April 17, 2025 by admin A. 220V B. 220/ 2V C. 110V D. 220 √2V
