WorksheetsCOD1101_Final Exam
Total questions: 32
Worksheet time: 8hrs 0mins
series
Parallel
is the opposition to the flow of charges in a material.
Resistance
Voltage
Time
Current
If lamp 1 is unscrewed from its holder, what will happen to lamp 2?
It will get brighter
It will stay the same brightness
It will go out
Nothing will happen
If lamp 2 is unscrewed from its holder, what will happen to lamp1?
It will stay lit
It will go out
It will get dimmer
It will dissapear
12. An overhead wire has a potential difference of 30,000 volts. If the current flowing through the wire is 1,000 amperes, what is the resistance of the wire?
0.033 ohms
30 ohms
3.0 x 10^7 ohms
3.0 x 10^8 ohms
"The total current in a parallel circuit equals the sum of the individual branch currents."
Ohm's Law
Kirchhoff's Voltage Law
Kirchhoff's Current Law
Bolen's Law
An electrical junction has four wires A, B, C and D connected to it. Wire A carries 7A going in, wire B carries 5 A going out and wire C carries 2 A going in. What does wire D carry?
10 A going out
5 A going out
4 A going in
4 A going out
Which statement is correct?
The current in parallel resistors is always equal.
The sum of the electric potential differences (or voltages) around a loop add to zero.
The sum of the currents in a closed loop is zero.
The sum of the voltages at a node is zero.
For the circuit shown, the resistances are R1 > R2 > R3. What is true about the current through each resistor?
I1 = I2 = I3
I1 > I2 > I3
I1 > I3 > I2
I1 < I3 < I2
Current through each resistor when they are connected in series is
different
same
decreasing
increasing
A "diode" will pass current in one direction only.
True
False
What does this electrical symbol represent?
battery
diode
resistor
switch
Doping is a process of adding a certain amount of specific impurities to semiconductor. What is the purpose of doping?
To increase the resistance of semiconductor
To increase the thermal energy of semiconductor
To increase the temperature of the semiconductor
To increase the conductivity of the semiconductor
What does this electrical symbol represent?
Capacitor
Potentiometer
Thermoresistor
Transistor
In a BJT
The base region is sandwiched between emitter and collector
The collector is sandwiched between base and emitter
The emitter region is sandwiched between base and collector
None of the above
In which region, the transistor operates.....?
Saturation Region
Cut-off Region
Active Region
None of the above
transistor has 3 electrodes namely
PNP
NPN
Base/ Collector/ Emitter
Drain/ Gate/ Source
One function of the transistor is to_____________?
rectify
amplify
limit
control
Voltage controlled device is
PN junction diode
BJT
FET
Zener diode
For an n-channel FET, What is the direction of current flow?
Source to drain
Drain to source
Gate to source
Gate to drain
A JFET has three terminals, namely …………
cathode, anode, grid
emitter, base, collector
source, gate, drain
none of the above
Op-Amp has _______ gain
High
Low
Zero
Medium
Which of the following electrical characteristics is not exhibited by an ideal op-amp
Infinite voltage gain
Infinite bandwidth
Infinite output resistance
Infinite slew rate
Identify the circuit
Adder
Differential amplifier
Differentiator
Integrator
For an Op-amp with negative feedback, the output is …….
equal to the input
increased
fed back to the inverting input
fed back to the noninverting input
Identify the circuit
Inverting amplifier
voltage follower
Differential amplifier
Non inverting amplifier
How many pins are there for uA741
16
7
6
8
What is the symbol for Inductance?
I
Z
XL
L
What is the symbol for Inductive Reactance?
L
XL
XC
R
What is the formula for Inductive reactance?
XL =2πfL
XL = 2πfL1
XL =2πHC
XL =VπfL
As a general rule, inductors oppose change in________________
Current
resistance
time
power
The unit of inductive reactance is the ohm.
True
False
