# mt2_key - PHY-2054 B001 Fall 2008 Instructor Dr...

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PHY-2054 B001, Fall 2008 Instructor: Dr. Bhattacharya Test #2, Tuesday, Nov 13, 3:00 pm - 4:15 pm Name: KEY TO GET FULL CREDIT YOU MUST SHOW YOUR WORK There are 10 questions in this test. Questions 1-8 are multiple choice and each worth 5 points. Questions 6 - 10 are regular questions and each worth 10 points. Useful informations for this test are provided on a separate sheet of paper. You are not allowed to use any other information excepting those provided in this information sheet. While answering each question please be as clear and speciFc as possible in explaining your notation, formula used, etc . Please use appropriate units in each case as necessary.

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1. The slide wire of the variable resistor in the Fgure is moved steadily to the left, decreasing the resistance in the circuit. The induced current in the adjacent rectangular loop is + - R (a) clockwise (b) anti-clockwise (c) zero (d) can be clockwise or anti-clockwise (e) none of the above 2. In a series R - L - C circuit, the voltage source produces an angular frequency ω . If this frequency is increased slightly (there may be more than one correct choice), (a) the total impedance will necessarily increase. (b) the reactance will necessarily increase. (c) the impedance due to the resistor does not change . (d) the total impedance increases if ω 1 / LC . 3. An electromagnetic wave of wavelength 600 nm is traveling in vacuum in the - z direction. The electric Feld points along the +ve x -axis and has an amplitude 0.045 V/m. One of the following statement is true for the magnetic Feld B : (a) It has a magnitude 1 . 5 × 10 10
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mt2_key - PHY-2054 B001 Fall 2008 Instructor Dr...

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