Question

answer all multiple choice please

1 12. A tiny spherical water drop has a charge of 3.00 X 10'15C. How many excess electrons are on the drop? b.2.25X10c. 1.6X 01 d. 1.87 X 10 13. A wire contains a steady eurrent of 0.75 A. The charge that passes a cross section in 3 s is: e. 3.35 C d, 225 С b, 6.4 x 10-1, С с.1.55 С a32x10", С 14. An electric field with a magnitude of 5 X 104 N/C is directed along the positive y-axis. A particle with a charge q.-5.8x1049 C is placed in the field. The force on the charge is a. 6.64 X 10* N perpendicular to the xy plane b. 2.9 X 10-14 N along the negative y-axis c. 2.9 X 10 N along the positive y-axis d. Zero 15. Electric field lines a. leave positive charge and enter negative charge. b. are close together where E is strong and far apart where E is weak. c. never cross d. all of the preceding 16. A negative charge placed between a positive and a negative charge will experience a force b. toward the negative charge d. not enough data to determine the direction a. toward the positive charge c. equal to zero 17. Two point particles, one with charge +5 x 10- C and the other with charge -4 x 10 C, are separated by 5 m. The electric field in N/C midway between them is: a. 20.5 b. 13.0 d. 9 x 109 1&. A proton (m-1.67X 107 Kg) is released from rest in a uniform electric field of magnitude 2.0 X 10 'N/C. What is the magnitude of the force on the proton? a. 1.6 X 10-15 N b. 1.6 X 102'Nc. 3.2 X 1015N d. 3.2 X 10-17N 19. The electrie field inside a solid condueting sphere of radius R and charge Q is a. kQR 3 d. zero b. kQR2 c. kQ/R 20. Consider a uniform electric field E 2500i N/C. What is the flux of this field through a square of side 20 cm in a plane parallel to the yz plane? a. 100 N m/C b. 200 N m/C . d. 500 N m2/c 21. During a lightening discharge, 20 C of charge move through a potential difference of c. 400 N m /C 1.0 X 10 V. The energy released by this lightning bolt is c. 2 X 109 a. 1 X105J b. 2 X 103J d.1000 J

Answer 1

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