What is the magnitude of the voltage shown by the multi-meter, when it is set in

Question

What is the magnitude of the voltage shown by the multi-meter, when it is set in the voltmeter mode. Use the following data: ? = 15.0 V, R1 = 13.9 ?, R2 = 37.9 ?, R3= 36.5 ?, R4 = 14.2 ?.
6.77 V

What is the magnitude of the current shown by the multi-meter, when it is set in the ammeter mode????

I figured out the first one but I don't understand the second questions

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Consider the circuit shown in the figure. The multi-meter M is a multi-mode measuring instrument capable to measure either voltage or current depending on its mode switch. What is the magnitude of the voltage shown by the multi-meter, when it is set in the voltmeter mode. Use the following data: ? = 15.0 V, R1 = 13.9 ?, R2 = 37.9 ?, R3= 36.5 ?, R4 = 14.2 ?. 6.77 V What is the magnitude of the current shown by the multi-meter, when it is set in the ammeter mode???? I figured out the first one but I don't understand the second questions

Explanation / Answer

in this problem we need to find thevenins equivalent

replace the multimeter find out open circuit voltage

source voltage=15V

V1=-R4/(R4+R3) *E

V2=-R2/(R2+R1) *E

R1 = 13.9 , R2 = 37.9 , R3= 36.5 , R4 = 14.2

.V1=-4.20VOLTS

.V2=-10.97VOLTS

open circuit voltage

=.V1-V2

=6.77VOLTS

find thevenins resistance ac seen by opencircuit

RTH=R4*R3/(R4+R3) +R2*R1/(R2+R1)

=20.39OHMS

in second case when E=6.77V

open circuit voltage is

.V1-V2

=-1.896+4.95

3.057V

it is set in the ammeter mode

=3.057/20.39

=0.1499A

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