If somebody can plz provide ALL the necessary work to these questions! The provi

Question

If somebody can plz provide ALL the necessary work to these questions! The provided orange text are the correct answers but I just have no idea of how to get them...

Practbul act1ce PHYS 2426 Dr. Honan - Test1 -A Name e-160x10", C -.106 Possibly Useful Information: 9.0x10"N:m" / C2 E0-885x10'12C2AN) melectron-9. 11x10"1kg mpronoe = 1.67x 10.27 kg M-10° k-10), c= 10.2 10, n=10-9 m- Problem I Multiple Choice The diagram shows two point charges. Q and Qr are the charges on the left and right respectively. (3 points each) (a) positive (b) negative (c) zero (d) cannot be determined (a) positive (b) negative (c) zero (d) cannot be determined [i] What is the sign of charge a? [ii] What is sign of the total net charge(QtQRy? B ii] Which point A or B is at higher electric potential? (a) A (b) B (c) both are the same (d) cannot be determined Problem 2 (a) A ring with a 15cm radius and with a uniform charge of 20uC is in the yz-plane with the origin at its center What is the force on a -3uC charge on the x-axis at x- 5em? (7 points) 6.33 p (b) How many electrons must be removed from a conducting sphere with a 3cm radius to make the electric field at its surface 6000 V/m? (6 points): 3.75 69 (c) Two electrons separated by 2x101 m are released from rest. What is the speed of each electron when they are a large distance apart. (Both electrons will have the same speed) (6 points)-1,1

Explanation / Answer

1. (i) field lines emerges from +ve charge .

so QL is +ve charge.

Ans(A)

(ii) field lines exits on -ve charge.

hence QR is negative charge.

Ans(B)

(iii) field lines goes from higher potential to lower potential.

lnes -> from B to A

hence B is at higher potential

Ans(B)

  

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