In a typical transmission line, the current I is very small and the voltage V is very large.A unit length of line has resistance R.For a power line that supplies power to 10 000 households, we can conclude that: A)IV = I2R. B)I = V/R. C)IV I2R. E)I2R = 0.

Question

In a typical transmission line, the current I is very small and the voltage V is very large.A unit length of line has resistance R.For a power line that supplies power to 10 000 households, we can conclude that:
A)IV = I2R.
B)I = V/R.
C)IV < I2R.
D)IV > I2R.
E)I2R = 0.

Quizplus · Accepted Answer

In a transmission line, power loss due to resistance is given by I²R, and the power transmitted is IV. Since the current is very small and the voltage is very large, the power transmitted (IV) is greater than the power loss (I²R).

In a Typical Transmission Line, the Current I Is Very