A galvanometer with a full-scale sensitivity of 600 μA and a coil resistance of 50-Ω is to be used to build an ammeter designed to read 5.0 A at full scale. What is the required shunt resistance?
Answer to relevant QuestionsA galvanometer has a coil resistance of 20-Ω. A current of 200μA deflects the needle through ten divisions at full scale. What resistance is needed to convert the galvanometer to a full-scale 10-V voltmeter? Suppose you are using a drill that is incorrectly wired as in Fig. 18.22a, and you make electrical contact with an ungrounded metal case. (a) Explain why this is a dangerous situation for you. (b) Estimate the current in ...Fig. 18.43 shows a schematic circuit of an instrument called a potentiometer, which is a device for determining very accurate emf values of power supplies. It consists of three batteries, an ammeter, several resistors, and a ...You are given four resistors. (a) Show how to connect all the resistors so as to produce an effective total resistance of . (b) If this network were then connected to a 12-V battery, determine the current in and voltage ...A 100-turn circular coil of wire has a radius of 20.0 cm and carries a current of 0.400 A. The normal to the coil area points due east. A compass, when placed at the center of the coil, does not point east, but instead makes ...
Post your question