A rectangular coil (0.20 m × 0.80 m) has 200 turns and is in a uniform magnetic field of 0.30 T. When the orientation of the coil is varied through all possible positions, the maximum torque on the coil by magnetic forces is 0.080 N / m. What is the current in the coil?

a. 5.0 mA
b. 1.7 A
c. 8.3 mA
d. 1.0 A
e. 42 mA


c

Physics & Space Science

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Fill in the blank(s) with correct word

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Astronomers speculate that most galaxies have a massive black hole at their center. What could be the origin of the suspected black hole?

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Physics & Space Science

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Physics & Space Science

Has there ever been a situation in which a given quantity of matter was turned completely into non-material forms of energy?

A) Yes, in electron-positron pair production. B) Yes, in all three of the above types of experiments. C) Yes, in electron-positron annihilation. D) Yes, in nuclear fission and fusion. E) No, there must always be some matter left over.

Physics & Space Science