# Electric Forces And Electric Fields (15)

14 Questions | Total Attempts: 421  Settings  Chapter 15 Physics - Multiple Choice

• 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

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