JEE Main · 2006 · 30 Apr 2006 · Offline · Current Electricity

The Kirchhoff's first law (

\sum i = 0

) and second law (

\sum i R = \sum E

), where the symbols have their usual meanings, are respectively based on

(A)conservation of charge, conservation of energy✓ Correct
(B)conservation of charge, conservation of momentum
(C)conservation of energy, conservation of charge
(D)conservation of momentum, conservation of charge

Answer: (A)

Solution

Kirchhoff's junction rule,

\sum i = 0

, says that charge neither piles up nor drains away at a node, so it expresses conservation of charge. The loop rule,

\sum i R = \sum E

, adds the energy gained and lost by a unit charge around a closed loop and sets the net change to zero, which is conservation of energy. The two laws rest respectively on conservation of charge and conservation of energy.

JEE Main · 2006 · 30 Apr 2006 · Offline · Single correct option

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JEE Main · 2006 · 30 Apr 2006 · Offline · Current Electricity

Solution

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