On introducing a thin film in the path of one of the two interfering beams, the central fringe will shift by one fringe width. If n=1.5, the thickness of the film is (wavelength of monochromatic light is λ)

Question:

Options :

(a) 4λ
(b) 3λ
(c) 2λ
(d) λ

Answer :

Answer Steps :

step 1

step 2

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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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