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Questions and Answers
According to Coulomb's Law, the electric force between two charges q1 and q2 is described by which equation?
According to Coulomb's Law, the electric force between two charges q1 and q2 is described by which equation?
- $F_{12} = \frac{1}{4\pi\epsilon_0} \frac{q_1q_2}{r_{12}^3} \hat{r}_{12}$
- $F_{12} = \frac{1}{4\pi\epsilon_0} \frac{q_1q_2}{r_{12}^2} \hat{r}_{12}$ (correct)
- $F_{12} = \frac{1}{4\pi\epsilon_0} \frac{q_1q_2}{r_{12}} \hat{r}_{12}$
- $F_{12} = \frac{1}{4\pi\epsilon_0} \frac{q_1q_2}{r_{12}^4} \hat{r}_{12}$
If two charges q1 and q2 are of the same sign, what can be said about the force experienced by q1?
If two charges q1 and q2 are of the same sign, what can be said about the force experienced by q1?
- The force is attractive.
- The force is repulsive. (correct)
- The force is zero.
- The force cannot be determined.
What is the unit of electrical charge?
What is the unit of electrical charge?
- Coulomb (C) (correct)
- Ampere (A)
- Meter (m)
- Newton (N)
What is Newton's 3rd Law of Motion?
What is Newton's 3rd Law of Motion?
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What is the permittivity of free space?
What is the permittivity of free space?
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Study Notes
Electric Force and Coulomb's Law
- The electric force between two charges q1 and q2 is described by the equation: F = k * (q1 * q2) / r^2, where k is Coulomb's constant.
- If two charges q1 and q2 are of the same sign, the force experienced by q1 is repulsive.
Units and Constants
- The unit of electrical charge is the Coulomb (C).
Newton's Laws of Motion
- Newton's 3rd Law of Motion states that for every action, there is an equal and opposite reaction.
Permittivity
- The permittivity of free space is a constant, denoted by ε0, and has a value of 8.85 × 10^-12 F/m.
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