13 in this Ri cuit,we start with the switch at position . Which of the following

Question

13 in this Ri cuit,we start with the switch at position . Which of the following sraphs shows the voltage seross resistor R when the switch is moved to position A at time t 07 (cirgle one 7 t ?t solid glass block (n 1.46) I the incident angle is (0,- 25), what is the angle in the glass block (0y ? to the normal? 14. A beam of light is emitted in the cold Michigan April air and it strikes a 2 cm layer of ice (n 1.31), then passes into a with respect aie ice alass a) Nowhere - cannot happen b) 16.8 21.5 d) 49.2 e 17.6

Explanation / Answer

in RL ckt,

the growth of Current is given by I = io (1- e^-t/T)

where T is time constant  

so this follows exponential growth

so option D is Correct

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use snells law na Sin A = nb sin B

for air -ice interface

1 * sin 25 = 1.31 * sin B

Sin B = 0.322

B = 18.82 deg

then for ice glass interface

angle of incidence A = 18.82 deg

so

1.31* sin 18.82 = 1.46 Sin B

Sin B = 0.289

B = 16.8 deg option B it is

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