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WorksheetsELECTRONICS
Total questions: 67
Worksheet time: 34mins
(Fill in the blank)
Electronics is a field of science in which we study about electric ______ generated due to the movement of electric charges that flow in _____ that store and handle information, and how to control these currents.
curves, the ground
electrons, thin air
currents, circuits
cycles, outer space
Which of the following is responsible for leaving the atom, only to be replace, and creates the movement we refer to as electricity?
Proton
Electron
Neutron
Nuclus
Which of the following is a common conductor and insulator combination used for electric current?
Steel and Plastic
Water and Humans
Silver and Wood
Copper and Rubber
Conventional Current flows from
Positive to Neutral
Positive to Negative
Positive to Nucleus
Positively Counter Clockwise
Which of the following is true as it relates to Voltage, which is nothing but a type of force that a power source creates at its two ends.
This force makes the charge flow around the circuit.
This force is unnatural, and made exclusively by humans, as electricity is not seen in nature
Voltage is like a car driving on a freeway.
Voltage is always safe as long as you use an insulator.
(There may be more than one answer)
Resistors are important because...
They prevent components from being damaged.
They are capable of dropping the voltage of a circuit.
They make the circuit more powerful.
They eliminate the need for code.
The atomic weight of an element is approximately determined by:
The number of neutrons.
The number of protons.
The number of neutrons plus the number of protons
The number of electrons.
2. The atomic number of an element is determined by
The number of neutrons.
The number of protons.
The number of neutrons plus the number of protons.
The number of electrons
4. An ion:
A. Is electrically neutral.
B. Has positive electric charge.
C. Has negative electric charge
D. Might have either a positive or negative charge.
8. An electrical insulator can be made a conductor:
A. By heating.
B. By cooling.
C. By ionizing
D. By oxidizing.
9. A coulomb:
A. Represents a current of one ampere.
B. Flows through a 100-watt light bulb.
C. Is one ampere per second.
D. Is an extremely large number of charge carriers
11. The volt is the standard unit of:
A. Current.
B. Charge.
C. Electromotive force.
D. Resistance.
12. If an EMF of one volt is placed across a resistance of two ohms, then the current is:
A. Half an ampere.
B. One ampere.
C. Two ampere
D. One ohm
14. In some batteries, chemical energy can be replenished by:
A. Connecting it to a light bulb.
B. Charging it.
C. Discharging it.
D. No means known; when a battery is dead, you have to throw it away
Ohm's Law is
IR=V
I=VR
V=I/R
VI=R
The device shown here is
PN junction diode
LED
Zener diode
Varactor Diode
Unit of Resistor is
mho
ampere
ohm
volts
LED is
Light Enhancing Diode
Light Emitting Diode
Light Emitting Detector
Light Enhancing Detector
Which one is series connection?
Both option 1 and 2
Can't be predicted
The device which is used to convert ac into dc is called as
Regulator
Amplifier
Rectifier
LED
Which among these are semiconductor devices
BJT
LED
Zener
Op-Amp
An n type semiconductor is obtained by doping an intrinsic semiconductor with a
Pentavalent impurity
Trivalent impurity
Zener diode is a:
Lightly doped p-n diode
Heavily doped p-n diode
Normally doped p-n diode
None of the above
A junction diode that can operate in reverse breakdown voltage is called:
Schottky diode
Tunnel diode
Junction diode
Zener diode
If supply V is 20V
R1 = 5kohm R2 = 15kohm
What is V across R2
20V
15V
10V
5V
If supply V is 24V R1= 9kohm R2 3kohm
What is V across R2
9V
3V
6V
18V
The resistance of a uniform Conductor is directly proportional to the ________of the conductor
Length
Cross Sectional Area
Conductivity
In a material where the resistance INCREASES with an increase in temperature, the material is said to have a ____________
Neutral Temperature Coefficient
Positive Temperature Coefficient
Negative Temperature Coefficient
________ is the capacity of energy
Current
Voltage
Power
You are given a resistor whose stripes are colored from left to right as orange, orange, brown, silver. Find the resistance value.
330 Ohms
33KOhms
3.3 Mega Ohms
What is this ?
Fixed Resistor
Resistor
Variable Resistor
If the volatge is 20V and the current flowing through the circuit is 2 mA . What is the resistance?
100 Ohms
1 K Ohms
10k Ohms
Look at this & say What type of source
Current Source
Voltage Source
Independent Source
These are materials that have excellent current carrying capacity.
Semiconductor
Conductors
Insulators
Diodes
These are materials that have no current carrying capacity.
Semiconductor
Conductors
Insulators
Diodes
These are semiconductors in which intentionally impurities are added to make the element conductive.
Intrinsic Semiconductor
Extrinsic Semiconductor
P-type Semiconductor
N-type Semiconductor
A semiconductor doped with a pentavalent impurity element which has five electrons in its valence shell.
Intrinsic Semiconductor
Extrinsic Semiconductor
P-type Semiconductor
N-type Semiconductor
Majority Carrier in a P-type Semiconductor.
Acceptor Ion
Donor Ion
Positive Charge
Negative Charge
Potential barrier of a Silicon.
0.1 V
0.3 V
0.7 V
.10 V
In a forward bias condition, when the applied voltage is more than the potential barrier of this PN junction the resistance that is offered by the depletion region negligible.
True
False
In a reverse bias condition, the depletion region offers more resistance to these majority carriers.
True
False
Addition of pentavalent impurity to a semiconductor creates _____.
Free Electrons
Holes
Valence Electrons
Valence Ion
The forward voltage drop across a germanium diode is (a) .
A silicon diode displays a forward voltage of .25V at 10mA current at 300 Kelvin. Find the reverse saturation current. (in micro Ampere)
*no need to include the unit. 3 decimal places only.
(a)
