Electric Force

Mr. Anderson explains the concept of electric force in AP Physics Essentials video 26. The video covers the use of a positive test charge to explore electric fields, the representation of fields with field lines, and the interaction of charges within these fields. The electric force equation, F = qE, is introduced, and its components are explained. The video also discusses field maps and how charges interact within electric fields. Finally, Mr. Anderson demonstrates problem-solving techniques using the electric force equation, providing examples with protons and electrons.

What happens to a positive test charge when placed in an electric field?

• It remains stationary.

• It accelerates away from the field source.

• It accelerates towards the field source.

• It moves in a circular path.

How do electric field lines behave around a positive charge?

• They point towards the charge.

• They move away from the charge.

• They form a circular pattern around the charge.

• They remain static.

What is the unit of electric field strength?

• Newtons per Coulomb

• Volts per meter

• Joules per second

• Coulombs per second

Which formula represents the electric force experienced by a charge in an electric field?

• F = k * q1 * q2 / r^2

• F = q * E

• F = m * a

• F = p * v

If a proton is placed in an electric field of strength 2.1 x 10^5 N/C, what is the force acting on it?

• 3.4 x 10^-14 N

• 1.6 x 10^-19 N

• 2.1 x 10^5 N

• 0 N

What is the charge of a proton used in electric force calculations?

• 6.02 x 10^23 C

• 9.8 m/s^2

• 1.6 x 10^-19 C

• 0 C

How would you calculate the electric field strength if an electron experiences a force of 1.7 x 10^-8 N?

• Multiply the force by the charge of the electron.

• Add the force to the charge of the electron.

• Divide the force by the charge of the electron.

• Subtract the charge of the electron from the force.