A point source emits sound equally in all directions in a non- absorbing medium, Two points P and Q are at distance of 2m and 3 m respectively from the source. The ratio of the intensities of the waves at P and Q is

Question:

Options :

a)9:4
b)2:3
c)3:2
d)4:9

Answer :

a)9:4

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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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:

In an a. c. circuit the instantaneous current and e.m.f. are represented as: I = I0 sin(ωt – π/6) and E = E0 sin(ωt + π /3) respectively. The voltage leads the current by

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