Two Long Parallel Wires Carry Currents of 20 a and 5.0

question 126

Multiple Choice

Two long parallel wires carry currents of 20 A and 5.0 A in opposite directions.The wires are separated by 0.20 m.What is the magnitude of the $\vec { B }$ field midway between the two wires? (μ₀ = 4π × 10^-7 T ∙ m/A)

• A)1.0 × 10^-5 T
• B)2.0 × 10^-5 T
• C)3.0 × 10^-5 T
• D)4.0 × 10^-5 T
• E)5.0 × 10^-5 T

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Definitions:

Straight-Line Method

A method of calculating depreciation of an asset that allocates an equal portion of the asset's cost to each year of its useful life.

Discount on Bonds Payable

The difference when bonds are issued for less than their face value.

Carrying Value

The book value of assets and liabilities reported in the financial statements, considering depreciation or amortization.

Bond Payable

A long-term liability account that records the amounts owed to bondholders by the issuer.