U8 Test Flashcards
Charge can act at a distance by exerting an
Electric feild
-c1
Explain how lightning is created
- movement of clouds cause a build upof 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
- c4
List the factors that affect resistance
Temperature Length Width Material -C2
Describe what an electromagnet is and list the two ways to increase its strength
A temporary magnet made by placing a piece of iron in a current carrying coil of wire
-C4
Which circuit below contains the greatest voltage? *
A circuit with a current of 25 amps and a resistance of 16 ohms
- U8C3
The function of a generator is to change _______
mechanical energy to electrical energy
- U8C4
Providing a path that allows electric charges to travel directly into the Earth rather than traveling through a building.
Grounding
-c4
This exerts a force that causes other electric charges to move.
electrical fields
-C4
Silver has a resistance of 0.0198 ohms. What voltage would produce a current of 100 amps?
- 98 v
- U8C3
Which of the following statements about electric charge is true?
Electrical forces act at a distance.
-C4
Electric charges always flow from ______ areas to _____ areas.
negative, positive
-c2
The force or push that causes electric charges to move is called
voltage difference
-c2
A material through which electrons do NOT flow easily is a(n) _______.
Insulator
-c3
Which of the following objects would NOT be a good insulator of electric charge?
Skin
-c1
Which of the following will increase the resistance of a wire?
increasing the temperature of the wire
-c2
