All India SSC JE 2017 Electrical Engineering - Quiz 38

An electromagnetic wave is transmitted into a conducting medium of conductivity The depth of penetration is

A charge Q is enclosed by a Gaussian spherical surface of radius R. If R is doubled then the outward flux is

Consider the following statements :
1) Flaming’s rule is used where induced e.m.f. is due to flux cutting.
2) Leng’z law is used when the induced e.m.f. is due to change in flux linkages.
3) Lenz’s law is direct consequence of the law of conservation of energy.
Which of the above statements are correct?

What is the value of work required to move a + 8nC charge from infinity to a point P which is at 2m distance from a point charge Q = +5μC?

Given a range of frequencies, which of the following systems is best for transmission line load matching?