Faraday's Law: As shown in the figure, a large round loop of 269 turns and radius 67.0 cm carries a current of I = 78.0 A. A small square loop of 31.0 turns and 1.00 cm on a side is placed at the center of the large loop. If the current in the large loop drops to 0.00 A in 0.0470 s, find the induced emf in the small loop. The square loop is small enough that you can assume that the magnetic field in its region is uniform and equal to the magnetic field at the center of the round loop. (?0 = 4? × 10-7 T ? m/A)

Fill in the blank(s) with the appropriate word(s).


1.30 × 10-3 V

Physics & Space Science

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An electrically charged atom is an

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A rock sample contains 1/8 micrograms of the parent radioactive isotope Al-26 and 7/8 micrograms of its daughter isotope Mg-40. If the half-life of this decay is approximately 700,000 years, how old is this rock?

A) 2.1 million years B) 2.8 million years C) 1.4 million years D) 700,000 years

Physics & Space Science

A convex mirror has a focal length of ?20 cm. What is the object distance if the image distance is ?10 cm?

A. 10 cm B. 40 cm C. 60 cm D. 20 cm E. 30 cm

Physics & Space Science

A slender uniform rod 100.00 cm long is used as a meter stick. Two parallel axes that are perpendicular to the rod are considered. The first axis passes through the 50-cm mark and the second axis passes through the 30-cm mark

What is the ratio of the moment of inertia through the second axis to the moment of inertia through the first axis? A) I2/I1 = 1.5 B) I2/I1 = 1.7 C) I2/I1 = 1.9 D) I2/I1 = 2.1 E) I2/I1 = 2.3

Physics & Space Science