Physics 2 Flashcards
1
Q
What is Charles’ Law?
A
V/T = k, or V1/T1 = V2/T2
2
Q
What is Boyle’s Law?
A
P1V1= P2V2
3
Q
How are eddy currents created?
A
There is a changing magnetic field in the transformer core which induces an emf. The core is a conductor, so current flows.
4
Q
How can you make a transformer more efficient?
A
Laminate the core –> reduces eddy currents
Use a soft iron core –> easily magnetised/demagnetised to reduce hysteresis
High resistivity core –> reduces eddy currents
5
Q
What is the Vrms?
A
The direct voltage value that produces the same heating effect/power loss as the alternating voltage
6
Q
What is the definition of electric potential?
A
The work done per unit charge in bringing a point test charge from infinity to a defined point
