Physics= Electrical Circuits

Question 1

Current eqn and units

Answer 1

I=Q/delta t , 1 A= 1 J/s

Question 2

Ohms law, units

Answer 2

V=IR units= ohms

Question 3

Kirchoff’s junction rule

Answer 3

current into junction= current leaving junction

Ei= 0

Question 4

kirchoff’s loop rule

Answer 4

vsource= vdrop

Ev=0

Question 5

resistance eqn and units

Answer 5

R=pI/A (ohms/meter)

Question 6

electric power eqn

Answer 6

P=IV=I^2R=V^2/R

Question 7

capacitance eqn and units

Answer 7

C=Q/V, units= 1 F=1 C/V

Question 8

electrical field of a capacitor eqn

Answer 8

E=V/d

Question 9

Resistors in series vs in parallel eqns

Answer 9

series: Req= R1 + R2
parallel: 1/Req= 1/R1 + 1/R2

Question 10

capacitors in series vs parallel eqns

Answer 10

series: 1/Ceq= 1/C1 + 1/C2
parallel: Ceq= C1 + C2

Question 11

voltage drops across circuits in parallel and in series eqns

Answer 11

parallel: VP=V1=V2
series: VS= V1+V2

Question 12

where do you place a voltmeter in an electrical circuit?

Answer 12

in parallel with the voltage source

Question 13

where do you place an ammeter in an electrical circuit?

Answer 13

in series with the current / resistance