Electromagnetic Field Theory A voltage waveform V(t) = 12t2 is applied across a 1H inductor for t = 0, with initial current through it being zero. The current through the inductor for t = 0 is given by 12t3. 4t3. 12t. 24t. 12t3. 4t3. 12t. 24t. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory Magnetic circuit with cross sectional area of 20 cm2 is to be operated at 50 Hz from 120 Vrms supply. The number of turns required to active a peak magnetic flux density of 1.8 T in the core flux is 600. 300. 450. 150. 600. 300. 450. 150. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory The principle of dynamically induced emf is utilized in a choke. generator. thermocouple. transformer. choke. generator. thermocouple. transformer. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory Two point charges (Q and – Q) are situated at the vertex of the square. If potential at another vertex is 2 V, so potential at opposite vertex (diagonally) is 2 V. 1 V. Zero. √ 2 V. 2 V. 1 V. Zero. √ 2 V. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory A magnetic vector potential is given by the expression A = (- cos x) (cos y) uz. The flux density at the origin is – 2 ux. 0. – uy. 2 ux. – 2 ux. 0. – uy. 2 ux. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory A conductor is rotating with in a magnetic field. At which of the positions do the peak voltages occur? Anywhere. Along the axis of the magnetic field. At an angle of 45° to the axis of the magnetic field. At right angles to the axis of the magnetic field. Anywhere. Along the axis of the magnetic field. At an angle of 45° to the axis of the magnetic field. At right angles to the axis of the magnetic field. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS