A microscope is focused on a coin lying at the bottom of a beaker. The microscope is now raised up by 1 cm. To what depth should the water be poured into the beaker so that coin is again in focus? (Refractive index of water is 4/3)

Question:

Options :

(a) 1 cm
(b) 4/3 cm
(c) 3 cm
(d) 4 cm

Answer :

(d) 4 cm

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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