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 degrees
Related Mcqs:
- A capacitor of capacitance 30µF is charged by a constant current of 10mA. If initially, the capacitor was uncharged what is the time taken for the potential difference across the capacitor to reach 300V ?
A. 0.9sec
B. 15 sec
C. 1.5x105sec
D. 0.9x102sec - 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_______________?
A. Same
B. Different
C. At L will be more than at C
D. At L will be less than at C - When same current passes for same time through a thick and thin wire_________________?
A. more heat is produced in thick wire
B. more heat is produced in thin wire
C. no heat is produced in wire
D. less heat is produced in thick wire - If 1 ampere current flows through 2m long conductor the charge flow through it in 1 hour will be_______________?
A. 3600C
B. 7200C
C. 1C
D. 2C - A 100µF capacitor with a 12V source in series having frequency 50Hz will offer a capacitive reactance of about______________?
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________________?
A. Remains same
B. Brightness increases
C. Brightness decreases
D. No light - An alternating current is represented by the equation I = I∫sinπt which of the following equation represents an alternating current of frequency and amplitude twice that of the above current ?
A. I = 2I∫Sin(πt/2)
B. I = 2I∫Sin(2πt)
C. I = 2ISinπt
D. I = I∫sin(2πt) - A vector can be multiplied by a number. The number may be_______________?
A. Dimensionless
B. Dimensional scalar
C. Negative
D. All A, B and C are correct - Moving along the circumference of a circle completes two revolutions. If the radius of the circular path is R, the ratio of displacement to the covered path will be_______________?
A. πR
B. 2πR
C. 0
D. 4πR - If an object is placed away from 2f of a converging lens then the image will be_______________?
A. real and erect
B. virtual and erect
C. real and inverted
D. virtual
