Two 300 uH coils in series without mutual coupling have a total inductance of 600 uH 1200 uH 900 uH 300 uH TRUE ANSWER : ? YOUR ANSWER : ?
Mutually inductance between two magnetically coupled coils depends on All of the listed here Cross-sectional area of their common core Permeability of the core The number of their turns TRUE ANSWER : ? YOUR ANSWER : ?
A conductor carries 125 amperes of current under 60° to a magnetic field of 1.1 tesla. The force on the conductor will be nearly 120 N 30 N 90 N 60 N TRUE ANSWER : ? YOUR ANSWER : ?
The direction of induced e.m.f. can be found by Laplace's law Lenz's law Kirchhoff s voltage law Fleming's right hand rule TRUE ANSWER : ? YOUR ANSWER : ?
In case all the flux from the current in coil 1 links with coil 2, the coefficient of coupling will be 1.0 0.5 2.0 2.5 TRUE ANSWER : ? YOUR ANSWER : ?
In an iron cored coil the iron core is removed so that the coil becomes an air cored coil. The inductance of the coil will Remains same None of the listed here Increases Decreases TRUE ANSWER : ? YOUR ANSWER : ?
Which of the fpllowing inductor will have the least eddy current losses ? Air core Iron core Powdered iron core Laminated iron core TRUE ANSWER : ? YOUR ANSWER : ?
Lenz's law is a consequence of the law of conservation of Induced e.m.f. Energy Induced current Charge TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following inductor will have the least eddy current losses? Iron core Powdered iron core Air core Laminated iron core TRUE ANSWER : ? YOUR ANSWER : ?
The inductance of a coil will increase under all the following conditions except When the number of turns of the coil increase When permeability of the core increases When more area for each turn is provided When more length for the same number of turns is provided TRUE ANSWER : ? YOUR ANSWER : ?