UNIT 17

the rate at which charge flows

(a)  

the average velocity at which

free charges flow in response

to an electric field

(a)  

____ is defined as inversely

proportional to current

• Ohm’s law

• resistance

• drift velocity

• simple circuit

a circuit with a single voltage

source and a single resistor

• simple circit

• single circuit

• single circit

• simple circuit

Materials that obey Ohm's law, and hence have a constant resistance over a wide range of voltages, are said to be (a)  

There is a class of metals and compounds with resistances that fall virtually to zero below a certain temperature called the critical temperature.

• conductors

• capacitors

• resistors

• superconductors

транспортное средство

• vehiecle

• vehiecl

• vehicle

• veheicle

Coal ____ be a critical factor.

• think to

• tend to

• thinks to

• tends to

____ materials can me problematic, because mining them is usually dangerous and toxic.

• nature

• raw

• simple

• base

(according to the article)

It wasn't scientifically proven that old car batteries can be used as backup storage for solar power.

• True

• False

• Not stated