A solenoid has a cross-sectional area of 7.7 x 10 m2, consists of 310 turns per meter, and carries a current of 0.43 A. A 20-turn coil is wrapped tightly around the circumference of the solenoid. The ends of the coil are connected to a 1.4-g resistor. Suddenly, a switch is opened, and the current in the solenoid dies to zero in a time of 0.039 s. Find the average current induced in the coil. Number 47.24 Units

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A solenoid has a cross-sectional area of 7.7 x 10 m2, consists of 310 turns per meter, and carries a current of 0.43 A. A 20-turn coil is
wrapped tightly around the circumference of the solenoid. The ends of the coil are connected to a 1.4-g resistor. Suddenly, a switch is
opened, and the current in the solenoid dies to zero in a time of 0.039 s. Find the average current induced in the coil.
Number
47.24
Units
A
Your answer is partially correct.
A conducting coil of 1550 turns is connected to a galvanometer, and the total resistance of the circuit is 40 Q. The area of each turn is
6.00 x 10m?. This coil is moved fromaregion where the magnetic field is zero into a region where it is nonzero, the normal to the coil
being kept parallel to the magnetic field. The amount of charge that is induced
to flow around the circuit is measured to be 8.5 x 10C. Find the magnitude of the magnetic field.
Number
3.66E-3
Units
.. dndin
i.......
Transcribed Image Text:please help me understand the right answers the answer shown are incorrect Current Attempt in Progress Your answer is partially correct. A solenoid has a cross-sectional area of 7.7 x 10 m2, consists of 310 turns per meter, and carries a current of 0.43 A. A 20-turn coil is wrapped tightly around the circumference of the solenoid. The ends of the coil are connected to a 1.4-g resistor. Suddenly, a switch is opened, and the current in the solenoid dies to zero in a time of 0.039 s. Find the average current induced in the coil. Number 47.24 Units A Your answer is partially correct. A conducting coil of 1550 turns is connected to a galvanometer, and the total resistance of the circuit is 40 Q. The area of each turn is 6.00 x 10m?. This coil is moved fromaregion where the magnetic field is zero into a region where it is nonzero, the normal to the coil being kept parallel to the magnetic field. The amount of charge that is induced to flow around the circuit is measured to be 8.5 x 10C. Find the magnitude of the magnetic field. Number 3.66E-3 Units .. dndin i.......
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