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The full-scale deflection current of an ammeter is 1 mA and its internal resistance is 100 ohms. This is to have full deflection when 100V is measured. What is the value of series resistor to be used?

The full-scale deflection current of an ammeter is 1 mA and its internal resistance is 100 ohms. This is to have full deflection when 100V is measured. What is the value of series resistor to be used? Correct Answer 99.99 K ohms

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The full-scale deflection current of a meter is 4 mA and its internal resistance is 400Ω. This meter is to have full deflection when 400 V is measured. What is the value of the series resistor to be used?
সিরিজে সংযুক্ত একটি এ্যামিটার এবং একটি অজানা রোধ দুটি একই রকম 1.5 V ব্যাটারীর দুই প্রান্তে সংযুক্ত আছে। যখন ব্যাটারী দুটি সিরিজে সংযুক্ত থাকে তখন এ্যামিটার। amp রিডিং প্রদর্শন করে। আবার ব্যাটারী দুটি সমান্তরালে সংযুক্ত করলে 0.6 amp রিডিং প্রদর্শন করে। ব্যাটারীর আভ্যন্তরিন রোধ কত ? (An ammeter and an unknown resistance are connected in series across two identical batteries of each 1.5 V. The ammeter shows current I amp and 0.6 amp when the batteries are connected in series and parallel, respectively. What is the internal resistance of the battery?)