Please solve all from 7-10 as soon as possible into two charged particles 7, A g

Question

Please solve all from 7-10 as soon as possible

into two charged particles 7, A gamna ray photon passes near a heavy nucleus and breaks at par over thh ent.re region we "x" in the photo indicates the direction of the magnetic field what charge does particle A have? a) positive b) negative c) neutral d) It's impossible to say without more information. Fig. 1 insulated 8. A child winds 100 trnsofthinacopper wire on an iron nail and then 10 turns of thick inuted steel wire on top of that. If the stee1 wire is plugged into a 120v wall outlet, how much voltage is there across the copper wire? a) zerc Steel 10v 12v 120v Copper 100 10 Turns Wire Wire Turns e) 1,200v f) 12,000v and left there inute, 9. If the copper wire of the previous problem is connected to a 12v automobile battery how much continuous voltage wil1 there be across the steel wire? a) zero b) 0.12v 12v 120v e) 1,200v f) 12,000v Which arrow in Fig. 2 shows the direction the positive charge will go? a) A b) B c) C d) D Fig. 2

Explanation / Answer

7.

Direction of magnetic field is into the page

Direction of velocity of A is downward

Now use right hand law: Stretch thumb, index figure and middle figure exactly perpendicular to each other. In this case, index figure show direction of velocity v, middle figure will shown direction of magnetic field B and force F on the charged particle will be shown be the thumb.

Thus,

F= q( v X B)

So from the right hand rule, since the charged particle is moved to the direction of (v xB) , we can conclude charge on the particle is ‘positive’.

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