18.3 Physics Flashcards
What’s a fuse and what does it do?
A fuse is a small metallic strip that melts if the current exceeds a certain value, in order to prevent excessive current on appliances in that circuit.
What is a circuit breaker?
A circuit breaker breaks the circuit by triggering a switch in the circuit in response to an excessively high current, and are reset rather than replaced.
Solve page 646
Solve page 647
What is the total current when resistors are in series?
The same as the current in each resistor
What is the total voltage when resisitors are in series?
Sum of each resistors’ voltage
What is the total current when resistors are in parallel?
Sum of each resistors’ currents
What is the total voltage when resistors are in parallel?
Same as the voltage in each reisstor
Solve page 648
Solve page 650
Solve formative assessment page 650
What are the units for current, resistance, and potential difference?
Current (I) = Amperes
Resistance (R) = Ohms
Potential difference = V
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Do page 656
Do page 657
Do page 658
