How do i predict the curent in mA and the volts in V of this current in the pict

Question

How do i predict the curent in mA and the volts in V of this current in the picture?

WORDS L Experiment 1, Predict the current. Determine how much voltage can be safely placed across the circuit shown without exceeding the maximum current through the LED 30mA). You will need to find the equivalent resistance of the circuit and use ohm's Law to find the limiting voltage, VMa-Imax Req Then find the amount of power in the circuit. Build the circuit following the instructions of your TA. Pay s ecia ention as to how to make connections to a "Bread Board' Assume R1-2000 R2 330 Rs R6 100 R5 once you have found vMfr back track your calculations step by step and find the value of the current and voltage across circuit Then measure them with a hand held digital voltmeter and record your predictions and measurements and in a Word Document, to be handed in at the end of lab

Explanation / Answer

p - parallel ; s - series

R5 p R6

R56 = 100 x 100/(100 + 100) = 50 ohm

R56 s R4

R4-56 = 50 + 50 = 100 ohm

R4-56 p R2

R2-4-56 = 100 x 330/ (100 + 330) = 76.74 Ohm

R2-4-56 s R1 s R3

Req = 76.74 + 200 + 50 = 326.74 Ohm

we know from Ohm's law

V = IR

V = 30 x 10^-3 x 326.74 = 9.802 Volts

Hence, V = 9.802 Volts are required.

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