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Questions and Answers
What is the expression for the electric potential due to a single point charge?
What is the expression for the electric potential due to a single point charge?
- $V = \frac{kQ}{r}$ (correct)
- $V = \frac{Q}{kr}$
- $V = kQr$
- $V = \frac{Q}{r^2}$
What is the work done on an electric dipole in a uniform electric field?
What is the work done on an electric dipole in a uniform electric field?
- Maximum when the dipole is aligned with the field
- Depends on the orientation of the dipole
- Zero (correct)
- Maximum when the dipole is perpendicular to the field
What is the expression for the torque on an electric dipole in a uniform electric field?
What is the expression for the torque on an electric dipole in a uniform electric field?
- $\tau = \vec{p} \cdot \vec{E}$
- $\tau = \vec{p} + \vec{E}$
- $\tau = \vec{p} \times \vec{E}$ (correct)
- $\tau = \vec{p} \div \vec{E}$
What is the line integral of the electric field often referred to as?
What is the line integral of the electric field often referred to as?
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What is the expression for the magnetic effect of current?
What is the expression for the magnetic effect of current?
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