How Much Current Must Flow Through a Long Straight Wire

question 77

Multiple Choice

How much current must flow through a long straight wire for the magnetic field strength to be 1.0 mT at 1.0 cm from a wire? (μ₀ = 4π × 10^-7 T ∙ m/A)

• A)50 mA
• B)9.2 A
• C)16 A
• D)50 A
• E)5.0 mA

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Definitions:

Disbursement Float

The time lag between when a check is issued and when the funds are actually withdrawn from the issuer’s account.

Clear

To finalize or settle a transaction or an obligation, especially in the context of financial transactions.

Disbursement Float

The time difference between the issuance of a payment and when the funds are actually debited from the payer’s account.

Cheques

A written, dated, and signed instrument that contains an unconditional order directing a bank to pay a definite sum of money to a payee.