FIRST-YEAR PHYSICS TERM 3 NOTES
Electrostatics:
Charge is quantized: q = ne. Like charges repel, unlike charges attract.
Coulomb’s Law:
F = k|q1*q2|/r^2
Electric Field:
E = F/q; For point charge: E = kQ/r^2
Electric Potential:
V = kQ/r
Current and Voltage:
I = ∆Q/∆t ; V = W/Q
Ohm’s Law:
V = IR
Resistance of a Conductor:
R = ρL/A
Series Circuits:
Re = R1 + R2 + R3
Parallel Circuits:
1/Re = 1/R1 + 1/R2 + 1/R3
Kirchhoff’s Laws:
KCL: ΣI_in = ΣI_out
KVL: ΣV(loop) = 0
Electrostatics:
Charge is quantized: q = ne. Like charges repel, unlike charges attract.
Coulomb’s Law:
F = k|q1*q2|/r^2
Electric Field:
E = F/q; For point charge: E = kQ/r^2
Electric Potential:
V = kQ/r
Current and Voltage:
I = ∆Q/∆t ; V = W/Q
Ohm’s Law:
V = IR
Resistance of a Conductor:
R = ρL/A
Series Circuits:
Re = R1 + R2 + R3
Parallel Circuits:
1/Re = 1/R1 + 1/R2 + 1/R3
Kirchhoff’s Laws:
KCL: ΣI_in = ΣI_out
KVL: ΣV(loop) = 0
