Test- Electricity And Magnitism Flashcards
(13 cards)
Which of the following statements about electric charge is true?
A. Objects must be touching on another to exert electrical force.
B. Air cannot conduct electricity; it is conducted only by solid materials.
C. Opposite electric charges always repel one another.
D. Electrical forces act at a distance
Answer. D
C1
Circuit that has more than one pathway for current to travel through
Answer. Series circuit
C3
This exerts a force that causes other electric charges to move.
Answer. Conductors
C4
Electric charges always flow from ______ areas to _____ areas.
Answer. Positive, negative
C2
Which of the following will increase the resistance of a wire?
A. increasing the temperature of the wire
B. using silver instead of copper
C. Using a shorter wire
D. using a thicker/wider wire
Answer. A
C3
When non-magnetic materials become attracted to magnets
Answer. Ferromagnitism
C4
- Charges can act at a distance by exerting a ______ ______ which is an example of _______.
Answer: electric field, induction
C4
- How is lightning created. Include which type of electric charge transfer it is
Answer: movement of clouds causes a build up of static electricity. When e- build up enough it induces a + charge on Earth.
Attraction becomes so great that e- go to Earth to neutralize- static discharge
C1
- Explain how a battery works
Answer: chem. Rxr- voltage difference between + and - terminals. When connected, this pushes current through wire due to voltage diff. e- flow from - to + end
C3
- List four factors that affect resistance in a circuit
Answer: material, size, length, temperature.
C3
- What is a better way to draw a resistor
Answer. Box with zigzag in it
- List two differences between series and parallel circuits and list a real-world example of each
Answer. Series= 1 path, all must work, ex-flashlight. Parallel= >1 path, can use one part at a time, ex- House
- Explain ferromagnetism. Make sure to include what is happening to the electrons in the atoms
Answer: when non magnetic objects are placed in a strong enough magnetic field and become magnetized due to poles within their atoms aligning all e- orient in same direction
C1
