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7. A `650`-`Ω` and a `2200`-`Ω` resistor are connected in series with a `12`-`V` battery.
(a) draw the electric circuit.
(b) What is the voltage across the `2200`-`Ω` resistor?
7. A 650-Ω and a 2200-Ω resistor are connected in series with a 12-V battery.
(a) draw the electric circuit.
(b) What is the voltage across the 2200-Ω resistor? `I = V/R_(eq)`
`V=IR`
(b)
`V2 = 9.3\ V`
(a)
(B)
Given:
`R1 = 650\ Ω`
`R2 = 2200\ Ω`
`V = 12\ V`
Equation:
`I = V/R_(eq)`
`V=IR`
Solution:
`I = V/R_(eq) = V/(R1+R2)`
`V2 = IR_2`
`=>`
`V_2 = V R2/(R1+R2)`
`V_2 = (12\ V) (2200\ Ω)/(650\ Ω+2200\ Ω)`
`V_2 = 9.3\ V` |