can I get help on 3 6 8 9 10 11 14 19 and 22 please. I'll rate up.

Question 9 Question 3 Question 11 part 1 of 1 10 points part 1 of 1 10 points 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- What is the primary difference between an Consider a loop of wire with a resistor. In net. The coil is connected to a resistor with electric motor and an electric generator? the same plane, (with switch S closed) a long ends labeled "a" and "b". The bar mag- 1. An electric motor is used to produce elec- net moves from right to left with North and wire has a current I flowing from left to right. tricity while an electric generator is used to South poles labeled in the figure. generate mechanic work with the input of Use Lenz's law to answer the following ques- electricity. tion concerning the direction of induced cur- R rents and magnetic fields. 2. Structurally they are similar but the elec- tric generator is more efficient than the elec- tric motor N S 3. Structurally they are similar and some de- S vices are designed to operate either as motors or generators. If switch S is open for a long period of What is the direction of the induced ma- 4. Structurally they are similar but the elec- time, and then suddenly closed, what is the tric motor is more efficient than the electric gentic field in the coil and the direction of the generator. direction of the induced current through R as induced current in the resistor R when the the current I rapidly increases? bar magnet is moving right to left? 5. An electric motor is often much more complicated in structure than electric genera- 1. The current flows left to right through 1. Induced magnetic field is right to left ( tor. R. Binduced) and current flows from "b" through R to "a" ( I 2. There is no current flow. 2. the induced field is zero tesla and current 3. The current flows right to left through flows from "a" through R to "b" (I -) Question 14 R. part 1of 1 10 points 3. Induced magnetic field is left to right (Binduced ) and current flows from "a" How does the current in the secondary of through R to "b" (1 -) the transformer compare with the current in the primary when the secondary voltage is 4. Induced magnetic field is left to right twice the primary voltage? (Binduced ) and current flows from "b" Question 6 through R to "a" (+ I) 1. The current in the secondary of the trans- former is the same as the current in the pri- part 1 of 1 10 points 5. Induced magnetic field is right to left mary of the transformer. Binduced) and current flows the induced 2. The current in the secondary of the trans- Given: Assume the bar and rails have neg- current is zero amperes ormer is twice the current in the primary of the transformer. In the arrangement shown in the figure, 6. the induced field is zero tesla and current flows from "b" through R to "a" ( I) the resistor is 8 0 and a 8 T magnetic field 3. The current in the secondary of the trans- is directed into the paper. The separation 7. the induced field is zero tesla and current former is half of the current in the primary of between the rails is 9 m . Neglect the mass of flows the induced current is zero amperes the transformer the bar. 8. Induced magnetic field is left to right 4. It depends, sometimes these two currents An applied force moves the bar to the right Binduced ) and current flows the induced are not related to each other. at a constant speed of 5 m/s. current is zero amperes (X X X X X X 9. Induced magnetic field is right to left ( Binduced) and current flows from "a" through R to "b" (1 -) X X (X Question 19 part 1 of 1 10 points 5 m/s x m &. quency of light and its color. 4. The lowest-frequency light we detect ap- pears to most people as the color violet. VI 5. The highest-frequency light we detect ap- Question 8 part 1 of 1 10 points tric pears to most people as the color red. gen Suppose you are looking into the end of What is the magnitude of the induced cur- Question 20 a long cylindrical tube in which there is a rent around the loop? Question 22 uniform magnetic field pointing away from 10 points you. 1. Wind | = part 1 of 1 What is the direction of the induced electric R field if the magnitude of the magnetic field is A point light source delivers a power P decreased with time? 2. Wind _ Blu R2 It radiates light isotropically. A mirror is placed at point B that is at distance r from 1. radially outward from the axis of the 3. Wind |= Bdu the source. The mirror has a cross section cube R2 A. Make the approximation that all the light Blu 2. counterclockwise 4. Lind | = hitting the mirror comes in perpendicular to B2 it. The mirror is a totally reflecting surface. 3. radially inward toward the axis of the tube 5. Wind | - Bdu R 4. away from you 6. Mind | - R 5. clockwise 7. Wind | = Bdu R2 6. toward you 8. Wind | - Blu R 9. Hind | = Bdu Find the total force on the mirror R A2 P 10. Mind | = FR 1. F = 2CAT2 2. F - ATT P 2AP CA c/,72 AP 4. F- c2 172 2 P 5. F- C7 72 P 6. F- C2 7 7 7. F_ 27 72 P CA2 8. F - TT Pc 9. F- P 2 P 10.Al