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  3. JAMIA MILLIA ISLAMIA

JAMIA MILLIA ISLAMIA Jamia Millia Islamia Solved Paper-2004

  • question_answer
        In the given fig. A, B and C are three identical bulbs. When the switch S is closed :

    A)  the brightness of bulb A does not change and that of B decreases

    B)  the brightness of bulb A increases and that of B decreases

    C)  the brightness of A increases bulb B does not glow

    D)  the brightness of both bulbs A and B decrease

    Correct Answer: B

    Solution :

                    When switch S is pressed, the resistance of circuit decreases. Hence, the current in bulb A will increase but the current in bulb B will decrease. Hence, the brightness of bulb A will increase and that of bulb B will decrease.


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