In the capacitive circuit the current
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
In the capacitive circuit the current Read More »
Physics
When A.C current passes through a capacitor then the current relationship will be
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
When A.C current passes through a capacitor then the current relationship will be Read More »
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
Pure resistor circuit the voltage and current are Read More »
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)
To find the r.m.s value of an alternating current mathematically we need to have
A. Mean value of I2
B. Square root of mean value of I2
C. Square root of I2
D. Square of 1/2
To find the r.m.s value of an alternating current mathematically we need to have Read More »
Electromagnetic waves emitted from antenna are
A. Stationary
B. Longitudinal
C. Transverse
D. All the above
Electromagnetic waves emitted from antenna are Read More »
Electromagnetic waves transport
A. Energy
B. Momentum
C. Mass
D. Heat
Electromagnetic waves transport Read More »
The direction of propagation of an electromagnetic waves is
A. Perpendicular to electric field
B. Perpendicular to both electric and magnetic field
C. Perpendicular to magnetic field
D. Parallel to electric and magnetic field
The direction of propagation of an electromagnetic waves is Read More »
A changing magnetic flux produces around itself an induced
A. Magnetic field
B. Electric field
C. Electromagnetic force
D. Artificial gravitational field
A changing magnetic flux produces around itself an induced Read More »