# guys can you help me plz ....

Discussion in 'Homework Help' started by salem2200, Nov 16, 2014.

1. ### salem2200 Thread Starter New Member

Nov 16, 2014
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0
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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2. ### shteii01 AAC Fanatic!

Feb 19, 2010
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Current divider.

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3. ### crutschow Expert

Mar 14, 2008
16,509
4,443
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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Apr 5, 2008
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Hello,

Have a look on google for "shunt resistor"

Bertus

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5. ### salem2200 Thread Starter New Member

Nov 16, 2014
2
0
Thanks that was very useful