ELECTRICAL RESISTANCE YA3

we describe connecting wires as having very __________

draw the rules 0f resistance traingle

When a voltage of 12 V is applied across a doorbell there is a current of 0.1 A. Calculate the resistance of the doorbell.

12 V / 2 Ohms AND 4 Ohms

1 ) calculate the current in each resistor

2) the voltage across each resistor

• 1) 2A

  2) 4V AND 8V

• 1) 2A

  2) 2V AND 4V

• 1)4A

  2) 7V AND 2V

• 1)2A

  2) 4A AND 8A

If a graph is a _____ line it has a constant slope. so the resistance of this component ______ ___ change

the flatter the slope the higher the resistance

more of temprature of a filament makes the current :

• decrease

• increase

diodes have a high resistance when the current is in opposite direction . correct it if its false

we have 5 uses of resistance. LIST THEM ALL .

Why are fixed resistors included in circuits?