Each multiple-choice question is worth 2 points, questions 6-9 are worth 5 point

Question

Each multiple-choice question is worth 2 points, questions 6-9 are worth 5 points each, and questions 10-11 are worth 10 points ork must be shown on problems 6-11 in order to receive credit for these problems. Be sure to on your answers! The current (as drawn in the figure) in the horizontal wire is flowing in the direction with time. Determine the direction of the induced current through the resistor (R) indicated and is decreasing From left to right. From right to left. No current will be induced in the resistor 2. A light bulb is connected in series with an inductor to a battery. What happens to the brightness of the light bulb (the inductor is initially uncharged)? a. It starts out bright and then gradually goes out. It starts out off and then gradually gets brighter. It starts out bright and stays bright. d. It never turns on. An electron has an initial velocity to the south but is observed to curve upward as the result of a magnetic field. The direction of the magnetic field is to the west. to the east. d. downward. A sinusoidal electromagnetic wave is propagating in vacuum. At a given point and at a particular time the electric field is in the +2-direction and the magnetic field is in the -y-direction. What is the direction of propagation of the wave? 4. x direction +x direction y direction d. y direction z direction +z direction e. the rms value of the current flowing through the resistor be the largest? R a atw(1/LC) b. at very low frequencies LCD atvery high frequencies " T 38 5o

Explanation / Answer

1. Option (a) is correct

Magnetic field is present in inside direction and it is decreasing therfore induced current will produced in such a way that its magnetic field in inside direction will increase.Therfore current will flow in clock wise direction

2. Option (a) is correct

Since we know that Lorentz force = q(V X B) and {-(-J ) X (-i)} = K, where J,i,K are unit vector along Y,X and Z axis

3. Option (a) is correct

At resonance current flowing through resistor is maximum and at resonance w = (LC)-0.5

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