Electricity Flashcards
1
Q
Fe=?(like Fg)
A
Fe=|q1xq2|/r^2 where k=9x10^9
2
Q
Fe=?(like Fw)
A
Fe=qE
3
Q
q+(vectors)?
q-(vectors)?
A
q+ outwards
q- inwards
From + to -
4
Q
E=?(Electricity at a point)
A
E=k(q/r^2)
5
Q
V=?(Electric potential)
Vtotal=?
Unit=?
A
V=k(Q/r)(point charge) or
-Ed(plates)
Volt or Joule/Coulomb
6
Q
Ue=?(electric potential energy)
A
Ue=qV or qEd or k(q1q2)/r
7
Q
We=?
A
We=-qΔV
8
Q
Maximum speed of charge passing through ΔV?
A
(1/2)m(vmax)^2=qΔV
9
Q
C=?
Unit=?
A
C=(εoA)/d or C=Q/V
Farad or Coulomb/Volt
10
Q
Energy of a capacitor?
A
Uc=1/2QV=1/2CV^2
11
Q
Ohm’s Law?
Unit=?
A
R=V/I
Ohm or Volt/Ampere
12
Q
Series :
Resistance,Current and Voltage?
A
R=R1+R2+…
I=I1=I2=…
V=V1+V2+..
13
Q
Parallel:
Resistance,Current and Voltage?
A
1/Rp=1/Rp1+1/Rp2+…
I=I1+I2+…
V=V1=V2=…
14
Q
Joule’s Law?
A
Q=I^2Rt
14
Q
Power?
A
P=I^2R=V^2/R=IV
15
Q
Brightness of lightbulb?
A
Amount of power dissipated
