physics ch 5
What is the total resistance of a 3-ohm resistor and a 6-ohm resistor in parallel?
2 ohms
What is the total resistance of a 3-ohm resistor and a 6-ohm resistor in series?
9 ohms
In a series circuit, the total voltage drop across a series of resistors is the sum of the voltage drops across each individual resistor
always true
As more lamps are put into a series circuit, the overall current in the power source
decreases
As more lamps are put into a parallel circuit, the overall current in the power source
increases
Compared to a single lamp connected to a battery, two identical lamps connected in series to the same battery will carry
less current
Compared to the resistance of two resistors connected in series, the same two resistors connected in parallel have
less resistance
Compared to a single lamp connected to a battery, two identical lamps connected in parallel to the same battery will carry
more current
When one light bulb in a series circuit containing several light bulbs burns out
none of the other bulbs will light up.
When one light bulb in a parallel circuit containing several light bulbs burns out
nothing changes in the rest of the circuit
In an electric circuit, the safety fuse is connected to the circuit in
series
In a parallel circuit, the current in each branch is the same
sometimes true
Light bulbs connected in series all carry the same current, regardless of their resistances
true