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WorksheetsPlacement Training - Technical (Electronics)
Total questions: 35
Worksheet time: 20mins
An electric heater draws 3.5 A from a 110 V source. The resistance of the heating element is approximately
385 ohms
38.5 ohms
3.1 ohms
31 ohms
The formula to find I when the values of V and R are known is
I = VR
I = VR
V = IR
I = V/R
A resistor is connected across a 50 V source. What is the current in the resistor if the color code is red, orange, orange, silver?
2 mA
2.2 mA
214 mA
21.4 mA
A series circuit consists of three resistors with values of 120 , 270 , and 330 . The total resistance is
less than 120
the average of the values
720
120
In order to get maximum power transfer from a capacitive source, the load must
have a capacitive reactance equal to circuit resistance
have an impedance that is the complex conjugate of the source impedance
be as capacitive as it is inductive
none of the above
Materials with lots of free electrons are called
conductors
insulators
semiconductors
filters
The unit of electrical charge is the
coulomb
joule
volt
watt
Current flows in a circuit when
a switch is opened
a switch is closed
the switch is either open or closed
there is no voltage
Which of the following is not a type of energy source?
generator
rheostat
solar cell
battery
Electrons in the outer orbit are called
nuclei
valences
waves
shells
A material that does not allow current under normal conditions is a(n)
insulator
conductor
semiconductor
valence
A multimeter measures
current
voltage
resistance
current, voltage, and resistance
An ammeter is an electrical instrument used to measure
current
voltage
resistance
none of the above
A transformer
changes ac to dc
changes dc to ac
steps up or down dc voltages
steps up or down ac voltages
Under normal conditions a diode conducts current when it is
reverse-biased.
forward-biased.
avalanched.
saturated.
The movement of free electrons in a conductor is called
voltage.
current.
recombination.
equilibrium.
An atom is made up of
protons.
neutrons.
electrons.
all of the above
The 7812 regulator IC provides ________.
5 V
–5 V
12 V
–12 V
The output of an AND gate with three inputs, A, B, and C, is HIGH when ________.
A = 1, B = 1, C = 0
A = 0, B = 0, C = 0
A = 1, B = 1, C = 1
A = 1, B = 0, C = 1
When used with an IC, what does the term "QUAD" indicate?
2 circuits
4 circuits
6 circuits
8 circuits
The output of an exclusive-OR gate is HIGH if ________.
all inputs are LOW
all inputs are HIGH
the inputs are unequal
the inputs are unequal
How many truth table entries are necessary for a four-input circuit?
4
8
12
16
Convert hexadecimal value 16 to decimal.
2210
1610
1010
2010
Convert the following decimal number to 8-bit binary.187
101110112
110111012
101111012
101111002
Convert binary 111111110010 to hexadecimal.
EE216
FF216
2FE16
FD216
Convert the following binary number to decimal.
010112
11
35
15
10
Hexadecimal letters A through F are used for decimal equivalent values from:
1 through 6
9 through 14
10 through 15
11 through 17
Digital electronics is based on the ________ numbering system.
Decimal
Octal
Binary
Hexadecimal
The 1's complement of 10011101 is ________.
01100010
10011110
01100001
01100011
In "n" type material, majority carriers would be:
holes
dopants
slower
electrons
In "p" type material, minority carriers would be:
holes
dopants
slower
electrons
A MOSFET has how many terminals?
2 or 3
3
4
3 or 4
A JFET
is a current-controlled device
has a low input resistance
is a voltage-controlled device
is always forward-biased
A three-point starter is suitable for
Shunt Motor
Series Motor
Shunt & Compound Motor
Shunt, Series, and compound motor
The reason for using starter while starting of DC motor is
To restrict armature current as there is no back E.M.F at starting
Motors are not self-starting
Restrict starting torque
None of the above
