Electricity and Magnetism Answers

Most antenna consisting of a 50 meter long vertical conductor operates over a perfectly conducting ground plane. It is base fed at a frequency of 600 kHz. The radiation resistance of the antenna in ohms is

Calculate the directivity of an antenna for θE = 30°, θH = 60

The velocity of electromagnetic wave in a good conductor is

A.3 x 10⁸ m/sB.more than 3 x 10⁸ m/sC.very lowD.high

What is magnetic field due to toroid.

What is electric flux density.

The two plates of a capacitor hold +2800 µC and -2800 µC of charge,

respectively, when the potential difference is 930 V. What is the capacitance? 

What is dipole moment.

Calculate induced emf induced in a coil having radius 2 cm and containing 320 turns placed in a time varying magnetic field. The plane of coil is perpendicular to the magnetic field whose expression for is given by:

B=(0. 0120T/s)t + (0.00035T/s⁴)t⁴

The coil is also connected to 300 Ω external resistor.

Suppose earth and moon carry + charges of equal magnetude. How large would charge need to be to produce an electrostatic repulsion equal 1% of gravitational attraction between the 2 bodies?

What is conduction current