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. TRUE ANSWER : ? YOUR ANSWER : ?
The electric field on a plane is decribed by . The field due to a dipole. a monopole. a dipole and a monopole. none of above. TRUE ANSWER : ? YOUR ANSWER : ?
A long straight wire carries a current I = 10A. At what distance is the magnetic field H = 1A/m? 1.19 m. 1.29 m. 1.39 m. 1.59 m. TRUE ANSWER : ? YOUR ANSWER : ?
When a current carrying conductor is brought into magnetic field, the force that moves the conductor depends upon None of these The value of current The weight of the conductor The direction of the conductor TRUE ANSWER : ? YOUR ANSWER : ?
A coil of 300 turns is wound on a non-magnetic core having a mean circumference of 300 mm and a cross sectional area of 300 mm2. The current of 3 A will be 37.68 mH. 113.04 mH. 37.68 µH. 113.04 µH. TRUE ANSWER : ? YOUR ANSWER : ?
A conductor is rotating with in a magnetic field. At which of the positions do the peak voltages occur? Along the axis of the magnetic field. Anywhere. At an angle of 45° to the axis of the magnetic field. At right angles to the axis of the magnetic field. TRUE ANSWER : ? YOUR ANSWER : ?
The Biot-savarts law is a general modification of Faradays law. Lenzs law. Amperes law. Kirchhoffs law. TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following statement regarding waveguides is incorrect? At waveguide can be coupled to a coaxial cable At frequencies below the cut off value the wave progresses across the waveguide after total reflections Waveguides can handle large power at UHF and microwaves Waveguides are usually air filled hollow conducting metallic tubes for transmitting UHF and microwaves TRUE ANSWER : ? YOUR ANSWER : ?
The field at any point on the axis of a current carrying coil will be zero. at angle of 45° with the axis. parallel to axis. perpendicular to the axis. TRUE ANSWER : ? YOUR ANSWER : ?
Conductor is varying and field is fixed then emf will be induced. This principle is called static induced emf. both A and B. None of these dynamically induced emf. TRUE ANSWER : ? YOUR ANSWER : ?