Circuit Flashcards
Thevinen Equivalent voltage
Vab=12Ω/(12Ω+4Ω)x12Volts
Two parallel flat plates are separated by 2cm. A voltage of 500 V is applied to the parallel plates. What is the maximum electric field force experienced by an electron passing between the plates?
E=V/d
F=qE
q=1.6*10-19
the rms current through the 45-ohm resistor in the circuit shown is
Vrms=Vmax/√2
Xc=1/ŵC
Find I
the current in the 100 ohm resistor is
first solve first loop:
ZP=(N1/N2)2Zs
and then find I=V/R
and then Is=(N1/N2)*IP
A copper conductor 10 m long and 3mm in diameter has a resistance of 0.024 ohms at room temperature (20C). What is the temperature in degrees Celsius if this conductor has a resistance of 0.036 ohms? (∝=0.0039)
R=R0{1+∝(T-T0)}
solve for T=148
the instantaneous current through the inductor at t=0.001 sec in amperes is
fin I∞=15V/10Ω=1.5A
T=L/R=0.0025/10
I=I∞+(I0-I∞)e-t/T
8 bit output
28= 256
When one system interacts with another system wich of the following is possible?
work can occur by one system inducing a force on the other system
A solid is a good electrical conductor if
the conduction band is half full
the rms voltage across the 40-ohm resistor is, in volts:
I=50/(40+30j)
Isolated system
the heat transfer is zero
not interact with its surroundings.
Power
P=I2R
An A/D converter has a range of -5V to 5V and 8 bit output. An output of 01101100 corresponds approximately to what input voltage?
28=256
voltage range (-5V to 5V)=100
10/256= 0.0391 volts/steps
01101100=108 steps
- 0391 volts/steps*108 steps=4.228
- 5V+4.228= -0.7772 volts
A/D
analog-to-digital
Two parallel conductors carry 50 amperes each in the same direction. The conductors are 5 cm apart. What is the magnetic force on 1 meter length of one conductor in newtons?
F=IL*B
B=uI/(2πr)
The power delivered by the 12 volt battery, above, in watts, is:
Power= V I
I=V/Ω
Find I loop1+I loop2=I
