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10th Class Science Electricity and Circuits Question Bank Electricity

  • question_answer
    In an experiment, four resistance wires made from the same material are connected in between the terminals P and Q in the circuit as shown below. The length and diameter of the wires are different. Which wire will give the smallest reading on the ammeter?                

    A)
    Length Diameter
    0.5 m 0.5 mm
                   

    B)  
    Length Diameter
    0.5 m 0.05 mm

    C)  
    Length Diameter
    5.0 m 0.5 mm
                   

    D)  
    Length Diameter
    5.0 m 0.05 m m

    Correct Answer: D

    Solution :

    In option (d), the wire is longer and thinner with higher resistance. This wire gives the smallest reading on the ammeter.


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