A circular loop carrying a current of 3.0 A is oriented in a magnetic field of 0.35 T. The loop has an area of 0.24 m2 and is mounted on an axis, perpendicular to the magnetic field, which allows the loop to rotate. What is the torque on the loop when its plane is oriented at a 50° angle to the field?
a. 4.6 N×m
c. 0.076 N×m
b. 0.16 N×m
d. 0.23 N×m
B
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Radiative energy is
A) energy carried by light. B) heat energy. C) energy from nuclear power plants. D) energy of motion.
What buoyant force is exerted by water on a 0.60-kg solid gold crown when it is immersed in water? The density of gold is 19.3 × 103 kg/m3 and that of water is 1000 kg/m3
A) 3.0 × 10-5 N B) 3.0 × 10-4 N C) 3.0 × 10-2 N D) 0.30 N
If you rub two transparency sheets with tissue and then hold the two transparency sheets at rest a short distance apart, they will then exert
A) a repulsive electric force on each other, but no magnetic force. B) a repulsive magnetic force on each other, but no electric force. C) an attractive electric force on each other, but no magnetic force. D) an attractive magnetic force on each other, but no electric force. E) no electric or magnetic forces on each other.