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A message signal of frequency 20 KHz and peak voltage of 20 volts is used to modulate a carrier signal of frequency 2 MHz and peak voltage of 40 volts. Determine (i) modulation index, (ii) the side bands produced. Draw the corresponding frequency spectrum of amplitude modulated signal. |
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Answer» SOLUTION :Condition `qE=qvB` `v=E/B` TRAJECTORY becomes helical about the direction of magnetic field (1) (b) To derive the expression of magnetic force acting per UNIT length of the wire `(FM)/(l)=(mu l_(1)l_(2))/(2pih)`, upwaqrds on wire AB (2). At equilibrium Magnetic Force per unit length = mass per unit length X G `(mu_(0) I_(1)I_(2))/(2pih)=m/l g(1)` |
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