rheostat

"The amount of time it takes to finish my homework is a variable; sometimes it takes me an hour, other times it takes much longer. "

"the resistance of bacteria to certain antibiotics"

"The river continuously flows to the sea, it will never pause to let us cross on dry land."

"Several people have lost their suitcases. Whose have you found?"

"During the occupation, many brave people acted as resistors, hiding refugees and sabotaging enemy supplies. "

"The brightness of the classroom light made it easy to see the teacher's notes. "

"My brother is a talented electrical. "

"As you can see, this spacious dining-room gets a lot of light in the mornings."

"The car was turning left at the intersection. "

"The long, red slide was great fun for the kids."

"The airport has three terminals, so make sure you know which one your flight leaves from. "

"A ship moves rapidly."