Lesson: Chapter 11 — Electronics

Putting the chapter together 1 of 3 Reset answers

Clear all your answers?

This erases every answer in this set and starts you again at question one. Your score will be gone.

Type these four numbers to confirm:

Those numbers don't match. Look at them again and type them.

Yes, clear Keep them

Question 1

Four LEDs of forward voltage 1.8 V are in series with a 6 V battery. Do they light?

A Yes, brightly B Only if the battery is reversed C Only one lights D No: they need 7.2 V

The right answer is the one marked above.

No: they need 7.2 V. 4 × 1.8 = 7.2 V, more than the battery gives.

Answer the question to continue.