A galvanometer has a coil resistance of 250 2 and requires a current of 1.5 mA...
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A galvanometer has a coil resistance of 250 2 and requires a current of 1.5 mA for full-scale deflection. This device is to be used in an ammeter that has a full-scale current of 25.0 mA. What is the value of the shunt resistance? What is the equivalent resistance of the ammeter? The shunt resistance is the resistor connected in parallel with the coil as shown in the diagram below. The current entering and leaving the branch is I = 25.0 mA. We want the current through the coil to be IG= 1.5 mA. IG www Rcoil = 2500 Rhomt ww Is = 1 - b G A galvanometer has a coil resistance of 250 2 and requires a current of 1.5 mA for full-scale deflection. This device is to be used in an ammeter that has a full-scale current of 25.0 mA. What is the value of the shunt resistance? What is the equivalent resistance of the ammeter? The shunt resistance is the resistor connected in parallel with the coil as shown in the diagram below. The current entering and leaving the branch is I = 25.0 mA. We want the current through the coil to be IG= 1.5 mA. IG www Rcoil = 2500 Rhomt ww Is = 1 - b G
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