You have a cylindrical 20 Ω carbon resistor (ρ=5x10-5 Ω m) that is 1.0 cm long and has a cross section area of 0.1 mm2. The resistor is connected to a 5 V battery.
Part 1: What is the resistance of the resistor if its area is doubled?
Part 2: By what factor does the power dissipated by the resistor change if the resistor length is halved and the battery voltage is doubled?
Part 3: By what factor does the current in the circuit change if the resistor length is doubled and the battery voltage is doubled?
1)
2)
3)
Get Answers For Free
Most questions answered within 1 hours.