Electric Forces And Electric Fields (15)

14 Questions | By Locolais | Last updated: Mar 11, 2013 | Total Attempts: 421

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Electric Forces And Electric Fields (15)

Chapter 15 Physics - Multiple Choice

Questions and Answers

1.

A very small ball has a mass of 5.0e-3 Kg and a charge of 4 uC. What magnitude electric field directed upward will balance the weight of the ball?
- A.
  
  1.2e4 N/C
- B.
  
  8.2e2 N/C
- C.
  
  2.0e-2 N/C
- D.
  
  5.1e6 N/C
- E.
  
  3.7e3 N/C
2.

Estimate the magnitude of electric field strenght due to the proton of hydrogen atom at a distance of 5.39e-11m. The expected position of the electron in the atom.
- A.
  
  10^-11 n/c
- B.
  
  10^8 n/c
- C.
  
  10^14 n/c
- D.
  
  10^6 n/c
- E.
  
  10^12 n/c
3.

The magnitude of the electric force between two protons is 2.3e-26 N. how far apart are they?
- A.
  
  0.10m
- B.
  
  0.022m
- C.
  
  3.1m
- D.
  
  0.0057m
- E.
  
  0.48m
4.
- A.
  
  1.0 N/C
- B.
  
  -1.0 N/C
- C.
  
  0
- D.
  
  0.25 N/C
- E.
  
  It varies
5.
- A.
  
  0
- B.
  
  -560
- C.
  
  -340
- D.
  
  260
- E.
  
  170
6.
- A.
  
  2.56 cm
- B.
  
  5.12 cm
- C.
  
  11.2 cm
- D.
  
  3.34 m
- E.
  
  4.24 m
7.
- A.
  
  1.15
- B.
  
  -2.24
- C.
  
  3.91
- D.
  
  -1.15
- E.
  
  0.863
8.
- A.
  
  F/12
- B.
  
  F/3
- C.
  
  F/6
- D.
  
  3F/4
- E.
  
  3F/2
9.
- A.
  
  Near a long uniformly charge wire
- B.
  
  Above a large uniformly charged plane
- C.
  
  Inside a uniformly charged ball
- D.
  
  Outside a uniformy charged sphere
- E.
  
  Gauss law can be readily applied to find the electric field in all contexts
10.
- A.
  
  Repel
- B.
  
  Attract
- C.
  
  Attract or repel
- D.
  
  Exert no electrostatic force
- E.
  
  Charge insulator always spontaneously discharges
11.
- A.
  
  The density matter is too great
- B.
  
  The positive nuclei of your body repel the positive nuclei of the atoms of the ground
- C.
  
  The density of the ground is greater than the density of your body
- D.
  
  Atoms are bound together by chemical bonds
- E.
  
  Electrons on the ground's surface of your feet repel one another
12.
- A.
  
  Upward and to the right
- B.
  
  To the right
- C.
  
  Downward
- D.
  
  Downward and to the left
- E.
  
  Field is zero at that point
13.
- A.
  
  It becomes larger
- B.
  
  It becomes smaller
- C.
  
  It stays the same
- D.
  
  It changes unpredictably
- E.
  
  It is zero
14.
- A.
  
  Increase masurably
- B.
  
  Increase by an amount to small to measure directly
- C.
  
  Stay unchanged
- D.
  
  Decrease by an amount to small to measure directly
- E.
  
  Decrease masurably