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2. (a) A car travels at 75 miles/hr. If the induced voltage in the car bumper of length 1.6 m is measured to be 1 mV, evaluate the earth's magnetic

field density in uWb/m?. Assume that the angle between the earth's magnetic field and the normal to the car is 65°. (b) Box the correct answer: A loop is rotating about the z-axis in a magnetic field defined by B =5 cos 10°t a, Wb/m². The voltage induced in the loop is due to i.Only motional emf ii.Only transformer emf iii.Both motional and transformer emf iv.None of the above

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