Resistors, lamps and diodes

1

What is the name given to the observation that the current flowing through a resistor is directly proportional to potential difference?

2

What specifically are potentiometers?

3

When placed in series how do you calculate the total resistance of two or more resistors?

4

What do diodes regulate?

5

What specifically causes the change in electrical energy to heat and light in a filament lamp?

6

What do LEDs emit?

7

What is current measured in?

8

Where are thermistors often used?

9

What is the function of a capacitor?

10

Why is the usage of LEDs increasing?