In a biprism experiment, when light of wavelength 6300 Å is used, the fringe width is 0.45 mm. With the same setting, when source of wavelength 4200 Å is used, the percentage decrease in fringe width will be

Question:

Options :

(a) 42%
(b) 33.33%
(c) 15%
(d) 63.33%

Answer :

(b) 33.33%

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:

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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