electricity and megnitism Flashcards
1
Q
current (A)
A
charge(C)/time(s) I=Q/t
2
Q
Voltage(V) 1
A
energy transferred(J)/charge v=W/Q
3
Q
Voltage 2
A
current x resistance (Ω) V=IR
4
Q
Power (Watts)
A
current x voltage P=IV
5
Q
power without volts
A
current^2 x resistance P=I^2R
6
Q
energy transfer
A
current x voltage x time W=IVt
7
Q
resistance in series
A
R1+R2+R3…=total
8
Q
resistance in parallel
A
1/R1+1/R2+1/R3…=1/total
9
Q
transformers
A
voltage in secondary coil/voltage in primary coil=turns on second coil/turns on primary coil Vs/Ps=Ns/Np
10
Q
transformer at max efficiency
A
voltage in secondary coil/voltage in primary coil=current in secondary coil/current in primary coil Vs/Vp=Is/Ip
