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10th Class Science Electricity and Circuits Question Bank Electricity

  • question_answer
    Two resistors of \[\text{4 }\Omega \] and \[\text{6 }\Omega \], are connected in parallel with a 6 V battery of negligible resistance. Calculate the current flowing through the battery.

    A) 1 A                                        

    B) 1.5 A                    

    C) 2 A                                        

    D) 2.5 A

    Correct Answer: D

    Solution :

    Let R be the equivalent resistance of the combination. \[\frac{1}{R}=\frac{1}{{{R}_{1}}}+\frac{1}{{{R}_{2}}},\frac{1}{R}=\frac{1}{4}+\frac{1}{6}=\frac{5}{12}\] Or \[R=\frac{12}{5}=2.4\,\Omega ,\]\[I=\frac{V}{R}=\frac{6}{2.4}=2.5A\]


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