Electric Field Strength

An electrostatic force of 20 N is exerted on a charge of 8.0 x 10^-2 C at point P in an electric field. What is the magnitude of the electric field intensity at P?

• 1.6 N/C

• 20. N/C

• 2.5 x 10² N/C

• 4.0 x 10^-3 N/C

An object with a net charge of 4.80 x 10^-6 C experiences an electrostatic force having a magnitude of 6.00 x 10^-2 N when placed near a negatively charged metal sphere. What is the electric field strength at this location?

• 2.88 x 10^-8 N/C directed toward the sphere

• 1.25 x 10⁴ N/C directed toward the sphere

• 2.88 x 10^-8 N/C directed away from the sphere

• 1.25 x 10⁴ N/C directed away from the sphere

A point charge of 0.003 C is far away from other charges. At a distance of 0.5 m from the charge, what is the magnitude of the electric field strength?

• 5.4 x 10^7 [N/C]

• 1.08 x 10^8 [N/C]

• 3.375 x 10^6 [N/C]

• 10 [N/C]

An electrostatic force of 2 X 10² N is exerted on a charge of 4 C at point P in an electric field. The magnitude of the electric field intensity at P is

• 8 X 10² N/C

• 5 N/C

• 2 X 10^-2 N/C

• 50 N/C

What is the magnitude of the electric field intensity at a point where a proton experiences an electrostatic force of magnitude 2.30 x 10^-25 N? Hint: The charge of a proton is 1.602 x 10^-19 C.

• 1.44 x 10^-6 N/C

• 3.68 x 10⁶ N/C

• 1.44 x 10⁴⁴ N/C

• 3.68 x 10^-44 N/C

Electricity is the flow of ______.

• electrons
• protons
• neutrons
• atoms

Opposite charges ...

• attract each other
• repel each other
• stabilize each other
• are not attracted or repelled

The force acting on a charge of 20 μC is 4 N. Determine the field strength at this point.

• 200 000 N/C

• 100 000 N/C

• 50 000 N/C

• 150 000 N/C

• 180 000 N/C

At what distance from the charge is 8 μC the field strength is

800 x 10³ N / C?

• 0.3 m

• 0.5 m

• 0.7 m

• 0.2 m

A positive charge of 1.5 x10^-8 C experiences a force of 0.025 N to the left in an electric field. What is the magnitude of the field?

• 1.7 x 10⁶ N/C

• 2.0 x 10⁶ N/C

• 3.4 x 10⁶ N/C

• 1 x 10⁶ N/C