Coulomb's Law (Electric Force) Video Lessons

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Problem: 1. The charge earned by one electron is e = -1.6×10-19 C. The number of electrons necessary to produce a charge of -1.0 C is A). 6.3×1018B) 1.6×109 C) 6.3×109 D) 1.6×109 E) none of the above 2. The force of attraction between a -40.0 μC and + 108 μC charge is 4.00 N. What is the separation between these two charges? A) 1.13 m B)2.10 m C) 3.12 m D) 2.49 m E) 3.67 m 3. An atomic nucleus has a charge of +40e An electron is 10-9 m from the nucleus. What is the force on the electron? A) 2.9 nN B) 9.2 nN C) 3.7 nN D) 1000 C E) 6.8 nN 4. A force of 10 N acts on a charge of 5.0 μC when it is placed in a uniform electric field. What is the magnitude of this electric field? A) 1.0 MN/C B) 50MN/C C) 0.50 MN/C D) 1000 MN/C E) 2.0 MN/C 5. Fig. 15-8 shows electric field lines near two electric point charges. If Q1 = -1 μC, what is the value of Q2? A) -1 μC B) 0 C) +1 μC D) -2 μC E) 2 μC

FREE Expert Solution

1.

The charge of an electron is given by:

1e = - 1.6 × 10-19 C

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Problem Details

1. The charge earned by one electron is e = -1.6×10-19 C. The number of electrons necessary to produce a charge of -1.0 C is 

A). 6.3×1018

B) 1.6×109 

C) 6.3×109 

D) 1.6×109 

E) none of the above 


2. The force of attraction between a -40.0 μC and + 108 μC charge is 4.00 N. What is the separation between these two charges? 

A) 1.13 m 

B)2.10 m 

C) 3.12 m 

D) 2.49 m 

E) 3.67 m 


3. An atomic nucleus has a charge of +40e An electron is 10-9 m from the nucleus. What is the force on the electron? 

A) 2.9 nN 

B) 9.2 nN 

C) 3.7 nN 

D) 1000 C 

E) 6.8 nN 


4. A force of 10 N acts on a charge of 5.0 μC when it is placed in a uniform electric field. What is the magnitude of this electric field? 

A) 1.0 MN/C 

B) 50MN/C 

C) 0.50 MN/C 

D) 1000 MN/C 

E) 2.0 MN/C 


5. Fig. 15-8 shows electric field lines near two electric point charges. If Q1 = -1 μC, what is the value of Q2? 

A) -1 μC 

B) 0 

C) +1 μC 

D) -2 μC 

E) 2 μC

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