The LED in the circuit has a forward voltage VF = 1.6 V and
an internal resistance RD = 2 Ω, and the LED requires
the current I to be at least 20 mA to turn on and emit light. What is
the minimum voltage V0 required to turn on the LED?
Test 2.2KCL
Select the value of R in the circuit so that VL = 12 V.
Test 2.3KCL
Determine current Ix in the bridge circuit.
Test 2.4KCL
Specify the magnitude of current I2.
Test 2.5KCL/KVL
Compute current Ix.
Test 2.6KCL
What is the value of I3?
Test 2.7KCL
Determine I4?
Test 2.8KCL/KVL
Determine current I3.
Test 2.9KCL/KVL
Determine the amount of power dissipated in the 3 KΩ
resistor.
Test 2.10KCL/KVL
Determine the current, I.
Test 2.11Voltage Reference
After assigning node V2 in the circuit as the ground node,
determine node voltage
V1.
Test 2.12Voltage Reference
After assigning node V2 in the circuit as the ground node,
determine node voltage V3.
Test 2.13Voltage Reference
After assigning node V2 in the circuit as the ground node,
determine node voltage V4.
Test 2.14KCL/KVL
The independent source supplies 36 W of power. Determine R.
Test 2.15Equivalent Circuit
What is the value of Req?
Test 2.16Equivalent Resistance
What is the value of Req?
Test 2.17Equivalent Circuit
Apply current source to voltage source transformation and voltage division to determine VL.
Test 2.18Equivalent Resistance
What is Req at terminals (b,f)?
Test 2.19Equivalent Resistance
What is Req?
Test 2.20Source Transformation
Apply source transformations to determine Voc across terminals (a,b).
Test 2.21Equivalent Circuit
Determine current I.
Test 2.22Bridge Circuit
In the bridge circuit on the left, I = 4 A. What will I change to
in the circuit on the right?
Test 2.23Bridge Circuit
In the bridge circuit on the left, I = 4 A. What will I change to
in the circuit on the right?
Test 2.24Diode Circuit
Determine V1 in the circuit. Assume VF = 0.7 V for the diode.
Test 2.25LED
Determine I1 in the circuit. Assume VF = 0.7 V
for each diode.
Test 2.26LED
In the diode circuit model shown, RD = 5 Ω and
VF = 1.2 V.
If I has to be at least 20 mA for the diode to emit light,
what is the largest value of R0 that would allow that to happen?
Test 2.27Dependent Sources
Determine the ratio Vout/Vin.
Test 2.28LED Circuit
The LED in the circuit has a forward voltage
VF = 1.6 V and an internal resistance RD = 2
Ω,
and the LED requires the current I to be at least 20 mA to turn on and
emit light.
What is the minimum voltage V0 required to turn on the LED?
Test 2.29KCL
Determine current Ix in the bridge circuit.
Test 2.30KCL/KVL
Determine current I3.
Test 2.31KCL/KVL
Determine current I.
Test 2.32KCL/KVL
The independent source supplies 54 W of power. Determine R.
Test 2.33Equivalent Circuit
Apply current source to voltage source transformation and voltage division to determine VL.
Test 2.34Equivalent Resistance
What is Req?
Test 2.35Source Transformation
Determine current I.
Test 2.36Diode Circuit
Determine V1 in the circuit. Assume VF = 0.7 V for the diode.
