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zimovet [89]
3 years ago
8

HELP NEEDED FAST (last cram sessions before finals)

Physics
1 answer:
aliina [53]3 years ago
5 0

Explanation:

The sum of the voltages of the components connected in a series circuit is equal to the voltage across the battery.

V_T = V_1 + V_2 +V_3

From Ohm's law (V=IR) and in a series circuit, the amount of current flowing through the components is the same for all. So we can write V_T as

V_T= 75\:\text{V} = I(170)+I(190) + 21\:\text{V}

I(170+190)=54\:\text{V}

I= \dfrac{54\:\text{V}}{360\:\text{ohms}}=0.15\:\text{A}

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