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Which of the following isn't true of an electric field?
Answer
An electric field can as well as does exist in vacuum. Except for the one about vacuum the entire the answers are part of the definition of the electric field. It is an electric field in the vacuum in a television picture tube which accelerates electrons to the front of the picture tube where they crash into a phosphorescent coating causing the latter to emit the light which we see as television images.
What are the advantages of fibre optic communication? Advantages of fibre optic communication are as follows: a. Enormous band width Coaxial cable transmission of 500 M
Two travelling sinusoidal waves are described by the wave functions Y1 = 55.00 sin[π(4.00x - 1200t)] Y2 =55.00 sin[π(4.00x - 1200t - 0.250)] where x, Y1 , and Y2 are in meter
Explain the term poly elastic and give some of example.
Distinguish among, analog and digital communication. Write any two modulation methods employed for the digital data. Explain briefly one of the techniques used.
Negative feedback principle: The idea that in a system where there are self-propagating conditions, those new conditions tend to act against earlier existing circumstances. Su
lumen; lm: The derived SI unit of luminous flux, described as the luminous flux emitted through a uniform point source of 1 cd emitting its luminous energy on a solid angle of
A new 90.0-V battery with a storage capacity of 2.5 x 10 4 C charges a 6800 μF capacitor with the switch in position A. Then the switch is thrown to position B to discharge th
what are solid core fibres?
A charge is said to be in equilibrium, if total force performing on it is zero. A operation of charges is said to be in equilibrium if every charge is independently is equilibrium.
A particle moving in a straight line with constant accelaration is having initial velocity of 10 m/s. After some time, the velocity becomes 30 m/s. Find the velocity of particle at
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