1. Jason wants to create a motor to spin a mirror ball for the school dance. He has a square 5cm x 5cm loop of wire with two ends that can be hooked to a battery, a 3V battery, and a magnet that creates a uniform constant magnetic field of 1T. Jason needs to hook those supplies up to a rod so that it will create torque on the rod, to spin and power the ball. a. Draw Jason’s motor design and choose the answer that best fills the blanks: It is the force on the __________ in the _____________ due to the ___________that will result in the torque to make the rod spin. i. magnetic field, wire, current ii. changing magnetic flux, magnetic field, electrons iii. wire, magnetic field, changing magnetic flux iv. electrons, wire, magnetic field b. He makes the motor in (a). What is the equation for the force that would result in the mirror ball spinning? choose the best answer i. F=qvBcos(theta) ii. F=qvBsin(theta) iii. F=macos(theta) iv. F=ma c. Part of his design includes a current-carrying loop in a magnetic field. What is the equation for the magnetic flux through the loop? choose the best answer i. B=uI/2r ii. magnetic flux=BA sin(theta) iii. B=(uI/2r)cos(theta) iv. magnetic flux=BAcos(theta) d. Find the magnetic flux through the loop (angle between the magnetic field and face of the loop is 20 degrees). Report the magnitude in mWb rounded to the second decimal
1. Jason wants to create a motor to spin a mirror ball for the school dance. He has a square 5cm x 5cm loop of wire with two ends that can be hooked to a battery, a 3V battery, and a magnet that creates a uniform constant magnetic field of 1T. Jason needs to hook those supplies up to a rod so that it will create torque on the rod, to spin and power the ball.
a. Draw Jason’s motor design and choose the answer that best fills the blanks: It is the force on the __________ in the _____________ due to the ___________that will result in the torque to make the rod spin.
i. magnetic field, wire, current
ii. changing magnetic flux, magnetic field, electrons
iii. wire, magnetic field, changing magnetic flux
iv. electrons, wire, magnetic field
b. He makes the motor in (a). What is the equation for the force that would result in the mirror ball spinning? choose the best answer
i. F=qvBcos(theta)
ii. F=qvBsin(theta)
iii. F=macos(theta)
iv. F=ma
c. Part of his design includes a current-carrying loop in a magnetic field. What is the equation for the magnetic flux through the loop? choose the best answer
i. B=uI/2r
ii. magnetic flux=BA sin(theta)
iii. B=(uI/2r)cos(theta)
iv. magnetic flux=BAcos(theta)
d. Find the magnetic flux through the loop (angle between the magnetic field and face of the loop is 20 degrees). Report the magnitude in mWb rounded to the second decimal.
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