JEE Main & Advanced Physics Current Electricity, Charging & Discharging Of Capacitors / वर्तमान बिजली, चार्ज और कैपेसिटर का निर Question Bank Thermo Electricity

  • question_answer
    The smallest temperature difference that can be measured with a combination of a thermocouple of thermo e.m.f. 30mV per degree and a galvanometer of 50 ohm resistance, capable of measuring a minimum current of  3 ´ 10?7 amp is [MP PET 2000]

    A)            0.5 degree                            

    B)            1.0 degree

    C)            1.5 degree                            

    D)            2.0 degree

    Correct Answer: A

    Solution :

               \[i=\frac{e}{R}\Rightarrow 3\times {{10}^{-7}}=\frac{(30\times {{10}^{-6}})\times \theta }{50}\]Þ \[\theta =0.5{}^\circ \]


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