Physics 34-35 Flashcards
A 60- Hz circuit means that the current
Alternates back and forth 60 times a second
The resistance of a wire depends on its
Length, diameter, and temperature
As more devices are connected into your house hold power lines, the combined resistance
Decreases
The source of electrons In a circuit is the outer electrons in the wires atoms
True
The power rating of a light bulb is 60 watts and it’s designed to use in a 120 bolt circuit. ___ amps of current will flow through the bulb
A half
Most of the energy consumed by a light buld is in the form of heat
True
Charge flows when ____exists between the ends of a conductor
Potential difference
A voltage source
Provides a potential difference
The positive terminal of a battery is represented by
A Long line
A _____is a device that can provide a Gap in a circuit if required
Switch
Electric ____ is what damages a persons body as it passes through
Current
A persons body will have ____ resistance of it gets wet
Less
A bird perched on a power line has _____ potential difference between his feet
Zero
_______are elements in a circuit that regulate current
Resistors
Ohms law states that the relationship among
Current, resistance, and voltage
