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0 votes
22.9k views
in Physics by (106k points)

A source of constant voltage V is connected to a resistance R and two ideal inductors L1 and L2 through a switch S as shown. There is no mutual inductance between the two inductors. The switch S is initially open. At t = 0, the switch is closed and current begins to flow. Which of the following options is/are correct?

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2 Answers

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by (32.5k points)

(A, B, C) After a long time the current through the resistor is constant I will divide into two parts L1 and L2 which are in parallel 

Also the ratio of currents through L1 and L2 is fixed at all times At t = 0, I ≈ 0

0 votes
by (393 points)
Whatever be the charge and field configuration outside, any cavity in a conductor remains shielded from outside electric influence. The field inside a conductor is zero. This is known as electrostatic shielding.

Sensitive instruments are shielded from outside electrical influences by enclosing them in a hollow conductor.

During lightning it is safest to sit inside a car, rather than near a tree. The metallic body of a car becomes an electrostatic shielding from lightening.

Potential inside the cavity is not zero. Potential is constant.

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