A resistor and an ideal inductor are connected in series to an ideal battery having a constant terminal voltage V0.
(a) At the moment contact is made with the battery, the voltage across the resistor is

a. V 0/e.
b V 0.
c. V 0/2.
d. zero.

(b) At the moment contact is made with the battery, the voltage across the inductor is
a. V 0/2.
b. V 0/e.
d. c. V 0.
zero.

(a). d. zero.

(b). c.

Explanation:

(a).

At the instant the switch is closed, there is no current in the resistor ( the inductor has prevented that), and therefore, there is no voltage across the resistor; Hence, choice d is correct.

(b).

Since there is no voltage drop across the resistor, all the voltage of the battery appears in the inductor, i.e the inductor and the battery are at the same potential —and they must be in order to protect Kirchhoff's voltage law.

Thus, choice c stands correct.

answer: the correct answer id option(d).

explanation:

snell's law refraction:

the angle of refraction =

the angle of incidence =

refractive index of air = = 1

refractive index of glycerol = 1.47

from the given options, the most closest answer to 63.72° is 65° of option (d).