The apparent frequency of the horn sounded by a train changes in the ratio 5: 4 as the train speeds past a stationary person. If the speed of sound in air is 360 m/s, the speed of the train is

Question:

Options :

(a) 4 m/s
(b) 7.2 m/s
(c) 40 m/s
(d) 72 m/s

Answer :

Answer Steps :

step 1

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An alternating voltage source is connected in series with a resistance R and an inductance L. If the potential drop across the resistance is 200 V and across the inductance is 150 V, then the applied voltage is:

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