guys can you help me plz ....

Thread Starter

salem2200

Joined Nov 16, 2014
2
guys can you help with this question ....

when you are about to measure the current flowing into a motor rated at 50 A , you realize that the ammeter you are using has a rating of 1 amp maximum only ( internal resistance of the ammeter is 50 ohm ) . suggest what you would do to use the ammeter to measure the current flowing in to the motor ?

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crutschow

Joined Mar 14, 2008
34,282
A current divider is a resistor placed in parallel with the meter so that a portion of the circuit bypasses the ammeter. So if you want to change the 1A meter into a 100A meter you would select a resistor value such that 99A flows through the parallel resistor while 1A flows through the ammeter. I will leave the calculation of that resistor value as an exercise for the OP.
 
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