A conductor of length 1 metre moves at right angles to magnetic field of flux density 1 Wb/m2 with a velocity of 25 m/s. The induced emf in the conductor will be 25 V. 75 V. 50 V. 100 V. TRUE ANSWER : ? YOUR ANSWER : ?
In case of antenna the ratio of the power radiated in the desired direction to the power radiated in the opposite direction is known as Transmission efficiency Loss coefficient Front to back ratio None of these TRUE ANSWER : ? YOUR ANSWER : ?
What is the value of skin depth as 100 Hz in a material having μr = 1.0 and & σ = 3.60 × 107 s/m 2.4 mm. 8.4 mm. 4 mm. 10 mm. TRUE ANSWER : ? YOUR ANSWER : ?
The force required to seperate two surfaces with a contact area measuring 5 cm by 6 cm, when flux density normal to the surface is 0.8 tesla, will be 76.4 N. 764 N. 7640 N. 76400 N. TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following will increase the antenna radiation efficiency? Top loading of antenna Any of the above Use of larger section of conductor Providing insulation on conductor TRUE ANSWER : ? YOUR ANSWER : ?
Which of following is the unit of inductance? Webers / m. Ampere turns. Ohm. Milli- henry. TRUE ANSWER : ? YOUR ANSWER : ?
Plane z = 10 m carries charge 20 C/m2. The electric field intensity at the origin is – 10 uz v/m. – 18 πuz v/m. – 72 πuz v/m. – 360 πuz v/m. TRUE ANSWER : ? YOUR ANSWER : ?
A charge which when placed in vacuum from an equal and similar charge repels with a force of 9 × 103 N, is known as pico - coulomb. micro - coulomb. coulomb. milli - coulomb. TRUE ANSWER : ? YOUR ANSWER : ?
Magnetic flux density emerging out of a closed surface is zero. infinite. depends on magnetic movements outside the closed surface depends on magnetic movements inside the closed surface. TRUE ANSWER : ? YOUR ANSWER : ?
If the static magnetic flux density is B, then Curl of B = J. Divergence of B = 0. Divergence of B = J. Curl of B = 0. TRUE ANSWER : ? YOUR ANSWER : ?