As Shown in the Figure, a Wire and a 10-Ω

question 33

Multiple Choice

As shown in the figure, a wire and a 10-Ω resistor are used to form a circuit in the shape of a square, 20 cm by 20 cm. A uniform but nonsteady magnetic field is directed into the plane of the circuit. The magnitude of the magnetic field is decreased from 1.50 T to 0.50 T in a time interval of 63 ms. The average induced current and its direction through the resistor, in this time interval, are closest to

• A) 63 mA, from b to a.
• B) 38 mA, from b to a.
• C) 63 mA, from a to b.
• D) 38 mA, from a to b.
• E) 95 mA, from a to b.

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Definitions:

Overestimate

To assess something as being larger, better, or more important than it actually is.

Underestimate

To judge something below its actual value, size, or importance.

Accomplish

To complete successfully or to achieve a set goal or objective.

Year

A period of approximately 365 or 366 days, divided into 12 months, used in the Gregorian calendar to measure the time a complete orbit of the Earth around the Sun takes.