Midterm2-sample.pdf - Midterm II SAMPLE Part I Concept...

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ε C ε t y x z Midterm II SAMPLE Part I – Concept Questions (15 points each). 1. A rectangular loop is placed in a uniform magnetic field with the plane of the loop parallel to the direction of the field. If a current is made to flow through the loop in the sense shown by the arrows: (a) what is the net force on the loop (b) what is the net torque ? 2. Consider a toroid made of N turns carrying a current i. Find the magnetic field inside the toroid. 3. A circuit consisting of capacitor C and voltage source e is constructed as shown. The graph shows the voltage presented to the capacitor as a function of time. Draw the time dependence of the current i in the circuit. 4. Consider an electromagnetic wave as illustrated below. How should you orient your dipole antenna in order to best receive this signal? Explain your answer.
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