18 Questions
What is the fundamental property of matter related to the presence of excess protons or electrons?
Electric charge
According to the Law of Charges, how do like charges interact with each other?
Repel
What do electric field lines represent around a charged object?
Field strength and direction
Which statement best describes the density of electric field lines with respect to the strength of the electric field?
Denser lines indicate a stronger field
What is static electricity primarily attributed to?
Friction or contact with charged objects
Which material is most likely to allow electric charge to remain stationary on its surface unless discharged through a conductive path?
Insulator
What does Coulomb's Law state?
The electric force is directly proportional to the square of the charges of the objects.
What kind of materials are conductors?
Materials that allow electric charge to flow easily through them.
How can insulators be charged by induction?
Bringing a charged object close without touching.
What is the definition of electric current?
The rate at which charge flows past a point in a circuit.
In which type of circuit do components connect end-to-end?
Series circuits
What happens to the electric force between two charged objects if the distance between them is doubled?
The force decreases by a factor of 4.
What is the main function of transformers in the distribution of electricity?
Step up voltage for long-distance transmission
What is the main difference between AC and DC currents?
DC currents flow in one direction continuously
What type of materials can be attracted to a magnet and magnetized?
Magnetic materials
Where do magnetic field lines flow from and towards inside a magnet?
From north to south outside the magnet, and from south to north inside the magnet
Which type of current is commonly used for long-distance transmission and why?
AC current, due to its continuous flow in one direction
What property distinguishes magnetic from non-magnetic materials?
Ability to be attracted to magnets and magnetization
Test your knowledge on factors affecting electric force based on Coulomb's Law and understand the properties and differences between conductors and insulators.
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