1.12- Potential Divider Circuits

Question 1

How is the current found in a potential divider?

Answer 1

I= V(in)/R1+R2

Question 2

How can the outer voltage be calculated in a potential divider

Answer 2

Vout= IR1

Question 3

What is the general equation for potential dividers?

Answer 3

R1XV(in)/R1+R2

Question 4

What is a rheostat

Answer 4

A variable resistor which is used to control current

Question 5

What happens when the resistance of the load decreases

Answer 5

The voltage across the load decreases

Question 6

What happens to an LDRs resistance in the dark

Answer 6

It is massively increased in darkness

Question 7

What would happen if you switched the position of a LDR and fixed resistor in a circuit?

Answer 7

It would have high resistance in bright light and low resistance in darkness

Question 8

What happens to the resistance of an ntc thermistor as temp increases

Answer 8

Resistance increases

Question 9

Outline uses for a thermistor in a potential divider

Answer 9

Air conditioning, seat temp controls, ice warning system