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Q.2 (a) What is it necessary to introduce a cylindrical soft iron core inside the coil of the d'Arsonval meter? (2 marks
Posted: Wed Apr 27, 2022 6:05 pm
by answerhappygod
- Q 2 A What Is It Necessary To Introduce A Cylindrical Soft Iron Core Inside The Coil Of The D Arsonval Meter 2 Marks 1 (63.37 KiB) Viewed 25 times
Q.2 (a) What is it necessary to introduce a cylindrical soft iron core inside the coil of the d'Arsonval meter? (2 marks) a (b) A d'Arsonval meter has a resistance of 25 and its sensitivity is 200 V. How will you convert it into an ammeter of range 0 - 8 A? (4 marks) (c) An ohmmeter as shown in Figure Q.2c has a meter movement with a full-scale deflection 5 mA with internal resistor 100 S2 (4 marks) Rm R. Rx 30 V 3 lit W mA Figure Q.2c The ohmmeter is zeroed and then an unknown resistance Rz is measured, where the meter show at the quarter-scale deflection from the full scale. Find Rx.