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Q15: An electron moves with a speed of
Q37: A rectangular loop of wire carrying a
Q39: The magnetic field due to a 2-A
Q50: Two point charges of magnitude 4.0 μC
Q67: An electron is placed in a constant
Q77: When we say that a material sample
Q79: Betelgeuse is a star in the constellation
Q89: The energy stored in a coil of
Q90: A 1938 nickel has a diameter of
Q102: In an electric furnace used for refining