Self- Check Test 3 Flashcards
Two negative charges attract each other.
False
Our appliances change electrical energy into the energy of light, heat, and sound, as well as motion.
True
Any object containing more electrons than protons is negatively charged.
True
A circuit can be overloaded by connecting too many appliances to it at one time.
True
An increase in voltage (with no change in resistance) in a circuit increases the current flow?
True
A dry cell contains no moisture?
False
Current that flows first in one direction and then in the other direction is called alternating current?
True
A commutator is a kind of automatic switch which converts alternating current into direct current?
True
To transmit electrical energy with as little waste as possible, the current should be made as large as it can be?
True
We use step-down transformers to lower the voltage of the electrical circuits to our homes?
True
Name two ways in which an electromagnet can be made stronger?
Wind, coil
A device which changes the voltage in sections of an electrical circuit?
Transformer
Rate of using energy or doing work?
Power
The current in amperes aquals the electromotive force in volts divided by the resistance ohms?
Ohms law
