Answer Happy

Question 91 part 1 of 1 10 points Given: A coil is suspended around an axis which is co-linear with the axis of a bar mag- net. The coil is connected to a resistor with ends labeled "a" and "6". The bar mag- net moves from right to left with North and South poles labeled in the figure. Use Lenz's law to answer the following ques tion concerning the direction of induced cur- rents and magnetic fields. N S R.b What is the direction of the induced ma- gentic field in the coil and the direction of the induced current in the resistor R when the bar magnet is moving right to left? 1 1. Induced magnetic field is right to left ( Binduced) and current flows from "b" through R to "a" (1) 2. the induced field is zero tesla and current. flows from "a" through R to "B" (I) 3. Induced magnetic field is left to right (Bond) and current flows from "a" through R to " (I->) 4. Induced magnetic field is left to right (Binduced) and current flows from " through R to "a" (1) 5. Induced magnetic field is right to left. (Binduced) and current flows the induced current is zero amperes 6. the induced field is zero tesla and current flows from "" through R to "a" (1) 7. the induced field is zero tesla and current flows the induced current is zero amperes 8. Induced magnetic field is left to right (Budond) and current flows the induced current is zero amperes 9. Induced magnetic field is right to left (B) and current flows from "a" through R to 8 (1)
Question 11 part 1 of 1 10 points What is the primary difference between an electric motor and an electric generator? 1. An electric motor is used to produce elec- tricity while an electric generator is used to generate mechanic work with the input of electricity. 2. Structurally they are similar but the elec- tric generator is more efficient than the elec- tric motor. 3. Structurally they are similar and some de- vices are designed to operate either as motors or generators. 4. Structurally they are similar but the elec- tric motor is more efficient than the electric generator. 5. An electric motor is often much more complicated in structure than electric genera- tor. Question 12
10. F = C Question 23 part 1 of 1 10 points A mirrored surface is illuminated by a 428 mW laser with a beam diameter of 0.5 μm. The speed of light is 2.9979 x 108 m/s and the index of refraction is 1. What is the magnitude of the force on the mirrored surface? Answer in units of N.