Electrical Current.The current ( I )in an electrical conductor varies inversely as the resistance (R) of the conductor. The current is 1/4 ampere when the resistance is 2304 ohms. What is the current when the resistance is 1296 ohms?
Answer: The current is ______ ampere.
(Simplify your answer. Type an integer or a fraction.)
2007-07-06 09:49:20 · 4 answers · asked by hllywdbabe7 1 in Science & Mathematics ➔ Mathematics
Ohm's Law
E=IR
= 0.25 * 2304
= 576 volts
I = E/R
I = 576/1296
I = 0.44 A
2007-07-06 10:01:39 · answer #1 · answered by N E 7 · 0⤊ 0⤋
Ohm's Law
V = IR (where V is a constant)
To find the current.
Multiply the current and resistance that you are given. The
result you get from the multiplication will be the value V.
Set the value V equal to the unknown current multiplied by
the next given resistance(1296 ohms) and solve that
equation for the current.
2007-07-06 09:57:24 · answer #2 · answered by ≈ nohglf 7 · 0⤊ 1⤋
4/9
I1 / R2 = I2 / R1
(The values 1 and 2 represent the values from sentence 1 and 2.)
(.25) / 1296 = I2 / (2304)
I2 = 4/9
2007-07-06 09:54:50 · answer #3 · answered by J G 4 · 0⤊ 1⤋
Cross multiply I = 1/R --> I1 R2 /R1 = I2 just plug in the numbers! ;)
2007-07-06 09:53:31 · answer #4 · answered by Kimura 3 · 0⤊ 0⤋