A coil of 160 turns and area 0.20 m2 is placed with its axis parallel to a magnetic field of initial magnitude 0.40 T. The magnetic field changes uniformly from 0.40 T in the +x direction to 0.40 T in the -x direction in 2.0 s
If the resistance of the coil is 16 ?, at what rate is power generated in the coil?
A) 5.0 W
B) 10 W
C) 15 W
D) 20 W
E) 25 W
Answer: B
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The axis of a long hollow metallic cylinder (inner radius = 1.0 cm, outer radius = 2.0 cm) coincides with a long wire. The wire has a linear charge density of ?8.0 pC/m, and the cylinder has a net charge per unit length of ?4.0 pC/m. Determine the magnitude of the electric field 3.0 cm from the axis.
A. 5.4 N/C B. 7.2 N/C C. 4.3 N/C D. 3.6 N/C E. 2.4 N/C
Optics is divided into ray optics and ______________ optics
Fill in the blank(s) with correct word
A solid sphere of mass 2.5 kg and radius 0.12 m is at rest at the top of a ramp inclined 15°. It rolls to the bottom without slipping. The upper end of the ramp is 1.2 m higher than the lower end. Find the sphere's total kinetic energy when it reaches the bottom
a. 70 J c. 29 J b. 47 J d. 8.8 J
Work-Energy Theorem: Three cars (car L, car M, and car N) are moving with the same speed and slam on their brakes. The most massive car is car L, and the least massive is car N. If the tires of all three cars have identical coefficients of kinetic friction with the road surface, for which car is the amount of work done by friction in stopping it the greatest?
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