A Toroid Is Made of 2 000 Turns of Wire

question 62

Multiple Choice

A toroid is made of 2 000 turns of wire of radius 2.00 cm formed into a donut shape of inner radius 10.0 cm and outer radius 14.0 cm. When a 30.0-A current is present in the toroid, the magnetic field at a distance of 11.0 cm from the center of the toroid is

• A) 0.0857 T.
• B) 0.109 T.
• C) 0.120 T.
• D) 0.600 T.
• E) 0.685 T.

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Definitions:

Bar Codes

A method of representing data in a visual, machine-readable form, consisting of bars and spaces, used to track and identify products.

RFID

Radio-Frequency Identification, a technology using wireless non-contact use of radio waves to transfer data for the purposes of automatically identifying and tracking tags attached to objects.

Two-Dimensional Code

A matrix barcode that stores information both horizontally and vertically, such as a QR code.

Active RFID Codes

Radio-frequency identification tags that have their own power source, allowing them to transmit data over longer distances than passive RFID tags.