26. What is the value of inductance of a coil that induces 100 volts when the current changes at the rate of 1 mA in 2 µsecs
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26. What is the value of inductance of a coil that induces 100 volts when the current changes at the rate of 1 mA in 2 µsecs?
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- A thundercloud has a negative charge, and an object on the ground has a positive charge. Will the lightning discharge be from the cloud to the ground or from the ground to the cloud?Find value of voltage induced in a coil. if a coil has 780 turns and a constant flux of 7mWb and a changing flux of 13mWb.What is the self-inductance of a circuit in which there is induced emf of 100 volts when the current in the circuit changes uniformly from 1 to 5 amperes in 0.3 second?
- An iron cored choke coil has an equivalent resistance of 5 ohm. It draws 10 A when the applied voltage is 240 V, 50 Hz. It's inductnce and power factor respectively are ?27. A coil in the radio transmitter has an inductance of 150 milli henry. At what frequency will it have an inductive reactance of 1884 ohms?The resistance of the field coils with copper conductor of a dynamo is 120 Ohms at 25 o C. After working for 6 hours on full load, the resistance of the coil increases to 148 Ohms. Calculate the mean temperature rise of the field coil. Take the temperature coefficient of the conductor material as 0.0042 at 0 o C.
- Show detailed explanation 19. The coils of an electromagnet have an inductance of 0.2 H and are carrying a current of 8 A. What will be the value of self induced emf when the current is reversed in 0.02 s. Answer: 160 VA coil has a time constant of 1 second and an inductance of 10 H. What is the value of the current 0.1 second after switching on to a steady voltage of 100 volts?make an introduction of at least 30 lines about PROTOTYPE OF PIEZOELECTRIC BALLAST FOR GENERATING ELECTRIC ENERGY THROUGH THE PEDESTRIAN TRAFFIC
- Two coils A and B known to have the same resistance are connected across a 110-volts, 60cycle line. The current and power delivered by the source are 5.8 Amperes and 500 watts,respectively. If the voltage across coil A is twice that across coil B, calculate the inductance ofcoil B.Calculate the 50 Hz inductive reactance at 1 m spacing in ohms/km of a cable consisting of 12 equal strands around a non conducting core. The diameter of each strand is 0.25 cm and the outside diameter of the cable is 1.25 cm.A coil with resistance of 20 ohms and inductance of 53 millihenry is connected across 141.4 volts, 60 Hz supply. What is the power factor of the circuit?