When does a magnetic field induce maximum EMF in a wire moving with a constant velocity?
A. When the wire is moved at an angle of 60 degrees to the direction of the magnetic field
B. When the wire is moved at right angles to the magnetic field
C, When the wire is moved parallel to the magnetic field
D. When the wire is moved at an angle of 30 degrees to the direction of the magnetic field
Is it B??
The polarity of an electromagnetic can be determined using the second right-hand rule.
A. True
B. False
Is it B?
B is ccorrect on the first. On the second, there is no uniformity of right hand and left hand rules, so I cannot help you there. Consult your text on that one.
For the first question, to determine when a magnetic field induces maximum electromotive force (EMF) in a wire moving with a constant velocity, we need to consider Faraday's law of electromagnetic induction. According to this law, the EMF induced in a wire is maximum when the wire is moved at right angles to the magnetic field.
So, for the first question, the correct answer is indeed B. When the wire is moved at right angles to the magnetic field, it will experience the maximum induced EMF.
As for the second question, the statement is true. The polarity of an electromagnetic can be determined using the second right-hand rule. This rule states that if you extend your right thumb in the direction of the current flow in a wire, then the direction in which your fingers curl will represent the direction of the magnetic field produced by that current. So, the correct answer is A. It is true that the polarity of an electromagnetic can be determined using the second right-hand rule.
I hope this helps! Let me know if you have any further questions.