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Voltages

The questions below are due on Sunday March 10, 2019; 11:00:00 PM.
 
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Find the value of the indicated voltage or current in each of the following circuits. Enter your answers as floating point numbers, accurate to two decimal places.

Circuit I

V_1 (in Volts): 

 

Circuit II

V_2 (in Volts): 

 

Circuit III

V_3 (in Volts): 
 

Circuit IV

In the following circuit, estimate the current I_4 to within 10% of the actual value.

I_4 (in Amperes):