both questions in 15 mins thank you very much An ac series circuit contains a re

Question

both questions in 15 mins

thank you very much

An ac series circuit contains a resistor of 350 ohms, an inductor of 2.8 H and a 10 uF capachor. It the frequency of the applied voltage is 87.5 Hz, what is the phase angle? A) 75,540 B) 89.20 C) 105 D) 81.340 E) 38.888889 A multiple slit diffraction grating has a slit separation of 2.8 x 10-6 m. Find the wavelength of the monochromatic light that will have its 2 order bright fringe diffructed through an angle of 30P.(1 nm-10 A)-1.932 X 10 B) 1.68 X 10C) 0.7 X 10 D) 0.187 X 10* E) 1.05 X 10

Explanation / Answer

(1) w=2*pi*f=2*pi*87.5

phase angle=tan^(-1)(wL-1/wC /R)=75.54

(2)let the wavelength is x

dsin(theta)=2*x

we got

x=0.7*10^(-6)

option(c) is correct

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