Practice Questions
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When visualizing the electric field around a positively charged sphere, what can we infer about the density of the electric field lines in relation to the distance from the sphere?
Near a positively charged sphere the electric field is strong, so the lines are drawn closer together. Other options are incorrect because Some studen...
How does the alignment of charges within a dielectric material under an external electric field affect the force calculated using Coulomb's Law?
When a dielectric material is placed between two charged objects, the molecules in the material tilt to align with the electric field. Other options a...
If two charged objects, one with a charge of +3 µC and the other with a charge of -2 µC, are placed 0.5 meters apart, what will be the nature of the force acting between them according to Coulomb's Law?
Opposite charges attract because electric field lines run from positive to negative. Other options are incorrect because Some people think opposite ch...
In a parallel plate capacitor filled with a dielectric material, if the dielectric constant of the material is doubled, how will this affect the capacitance and the electric field between the plates when the charge remains constant?
Capacitance is directly proportional to the dielectric constant, so doubling it doubles the capacitance. Other options are incorrect because Some thin...
If two charged objects, one with a charge of +4 µC and the other with a charge of +1 µC, are separated by a distance of 0.3 meters, what is the direction of the electric force acting on each charge according to Coulomb's Law?
Coulomb's Law says a positive charge feels a push away from another positive charge. Other options are incorrect because The idea that like charges at...
Which of the following statements about electric field induction in dielectrics are true? (Select all that apply)
When a dielectric is placed in an electric field, its molecules shift slightly, forming tiny dipoles that reduce the field inside the material. Other ...
Arrange the following steps in the correct order to describe the process of electric field induction in dielectrics: A. The external electric field is applied. B. The bound electrons in the dielectric experience a force. C. Induced dipoles are formed within the dielectric material. D. The dielectric material becomes polarized.
When a voltage is applied, the field pushes the bound electrons, creating a pair of opposite charges inside the material. Other options are incorrect ...
A technician is designing a capacitor using an insulating material as the dielectric. When an external electric field is applied to the capacitor, the technician observes that the dielectric material becomes polarized. How does this polarization affect the electric field within the capacitor?
When the dielectric polarizes, each small piece acts like a tiny compass that points opposite to the main field. Other options are incorrect because S...
When an external electric field is applied to an insulator, the material becomes polarized, creating _______ due to the displacement of bound charges.
An insulator keeps its electrons bound to atoms, but the electric field pulls the electrons a little from the nuclei. Other options are incorrect beca...
What is the primary reason that insulators become polarized when placed in an external electric field?
When an electric field touches an insulator, it nudges the tiny positive and negative parts of each atom so they line up with the field. Other options...
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