Circuits

Question 1

Explain why tenpwrsture incrwasing of a resistor when current passes thru

Answer 1

More electrons collide with ions in the lattice

Question 2

Explain how ldr and thermistors can be used to control current in circuit

Answer 2

LDR measure how much light intensity there is, more light intensity the resistance decreases. For thermistors the more higher temperature, resistance decrease and allow flow of electrons. It depends on the conditions

Question 3

How can students change the circuit so LED e.its light

Answer 3

Reverse connection to LED as current can only flow through one direction in diode

Question 4

What happens with alternating voltage on LED

Answer 4

Light goes on and off, and changes directions