11. Two point charges of magnitudes 5.00 C, and + 5.00 C are placed along the x-

Question

11. Two point charges of magnitudes 5.00 C, and + 5.00 C are placed along the x-axis at x- 0 cm and x- 100 cm, respectively. Which charge has the larger electrostatic force exerted on it? a. The charge located in origin b. The charge located at x = 100 cm c. The forces are equal 12. At the midpoint between the two charges in problem 11 the electric field is: a. Positive; b. Negative; C. Zero. 13. At the midpoint between the two charges in problem 11 the electric potential is: d. 9x 104 v e. 1.8 x 105 V f. Zero 14. The potential energy of the system in problem 11 is: a. Positive; b. Negative; c. Zero

Explanation / Answer

here,

q1 = 5 * 10^-6 C is at x1 = 0 cm

q2 = 5 * 10^-6 C is at x2 = 100 cm = 1 m

11)

Both charge exert equal and opposite force on each other

so, the correct option is c) the forces are equal

12)

At the midpoint between them

the net electric feild is c) Zero

13)

the electric potential at midpoint between two charges , V = K * q1 /(x2/2) + K * q2 /( x2/2)

V = 2 * 9 * 10^9 * 5 * 10^-6 /0.5 V

V = 1.8 * 10^5 V

the electric potential at midpoint between two charges is e) 1.8 * 10^5 V

14)

as both the charges are positive

the potential energy is also a) positive

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