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Krichoffs 2nd law

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Krichoffs 2nd law

    • Posted by Kamalpreet Kaur 5 years, 5 months ago

    CBSE > Class 12 > Physics
    • 1 answers

    Yogita Ingle 5 years, 5 months ago

    Kirchhoff’s Second law: Loop law

    • Loop law is also known as Kirchhoff’s Second Law.
    • It states that in a closed loop,algebraic sum of Emfsis equal to the algebraic sum of product of resistances and respective currents flowing through them.
    • Consider a simple circuit havingEmfs = E1 and E2; R1 and R2 =resistances; current =I1 and I2.
    • Then according to this law : E1+E2=I1R1+ I2R2
    • For example:-
      • Consider given figure,let Emfs be E1 and E2 internal resistances be R1, R2 and R3.
      • Steps to use Kirchhoff’s law:-
        • Choose the loop to apply Kirchhoff’s law.
        • Assume any direction.
        • Emf is +ive if assumed direction leaving +ive terminal of battery.
        • IR is +ive if the current in the assumed direction.

    3Thank You

    ANSWER
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