Question

Under identical conditions, for a single modulating frequency, FM and PM are indistinguishable. Now if the modulating frequency is reduced, then

a.

phase modulation index as well as frequency modulation index decrease

b.

phase modulation index as well as frequency modulation index increase

c.

phase modulation index will remain constant whereas frequency modulation index will increase

d.

phase modulation index will decrease whereas frequency modulation index will remain constant

Answer: (c).phase modulation index will remain constant whereas frequency modulation index will increase

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Q. Under identical conditions, for a single modulating frequency, FM and PM are indistinguishable. Now if the modulating frequency is reduced, then

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