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Continue Practice Exam Test Questions Part 3 of the Series
Choose the letter of the best answer in each questions.
101. The potential gradient in a cable is maximum in
A. Conductor
B. Outer sheath
C. Insulation
D. Uniformly all over
Solution:
102. The Q-factor of a parallel resonant circuit is also known as
A. Current magnification factor
B. Voltage magnification factor
D. Leakage factor
Solution:
103. The Q-factor of a series resonant circuit is also known as
A. Current magnification factor
B. Voltage magnification factor
D. Leakage factor
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Solution:
104. What is the form factor of a triangular wave?
A. 1.16
B. 1.11
C. 1.73
D. 1.41
Solution:
105. In a rectangular wave, the form factor is
A. 1.11
B. 1.16
C. 1.0
D. 1.73
Solution:
106. Which of the following dielectric materials makes the highest-capacitance
capacitor?
A. Air
B. Barium-strontium titanite
C. Mica
D. Electrolyte
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Solution:
107. In a circuit, an active element is one which
A. Supplies energy
C. Both supplies and receives energy
D. Amplifies signal
Solution:
108. An electric circuit contains
A. Passive elements
B. Active elements
C. Both active and passive elements
D. Reactive elements
Solution:
109. What is the hot resistance of a 100 W, 220 V incandescent lamp?
A. 2.2 Ω
B. 22 Ω
C. 484 Ω
D. 4.84 Ω
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Solution:
110. Which statement is true about a passive circuit?
A. A circuit with neither a source of current nor a source of potential difference
B. A circuit with a voltage source
C. A circuit with a current source
D. A circuit with only resistance as a load
Solution:
111. What is a closed path made of several branches of the network called?
A. Junction
B. Node
C. Terminal
D. Loop
Solution:
112. The internal resistance of an ideal voltage source is
A. Infinite
B. Equal to the load resistance
C. Zero
D. To be determined
Solution:
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113. What is the conductance of a circuit having three 10 Ω resistors in parallel?
A. 0.3 S
B. 3.33 S
C. 0.33 S
D. 30 S
Solution:
114. Electric energy refers to
A. Volt divided by coulomb
B. Volt-ampere
C. Volt-coulomb
D. Watt divided by time
Solution:
115. A capacitor requires 12 μC of charge to raise its potential of 3 V. What is the
capacitance of the capacitor?
A. 36 μF
B. 15 μF
C. 0.25 μF
D. 4 μF
Solution:
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116. A capacitor opposes change in
A. Voltage
B. Current
C. Voltage and current
D. Neither voltage nor current
Solution:
117. What is the total resistance of a two equal valued resistors in series?
A. The difference of both
B. The product of both
C. Twice as one
D. The sum of their reciprocals
Solution:
118. The ratio of maximum value to the effective value of an alternating quantity is
called
A. Form factor
B. Peak factor
C. Dynamic factor
D. Leakage factor
Solution:
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119. For series capacitors, total charge is
A. The sum of individual charges
B. Equal to the charge of either capacitors
C. Equal to the product of the charges
D. The quotient of the charges
Solution:
120. Series resonant circuit is sometimes known as
A. Rejector circuit
B. Acceptor circuit
C. Inductive circuit
D. Capacitive circuit
Solution:
121. Parallel resonant circuit is sometimes called as
A. Acceptor circuit
B. Rejector circuit
C. Inductive circuit
D. Capacitive circuit
Solution:
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122. When two pure sine waves of the same frequency and the same amplitude which
are exactly 180˚ out-of-phase are added together, the result is
A. A wave with twice the amplitude
B. A wave with half the amplitude
C. Zero signal
D. A wave with twice the frequency
Solution:
123. If two complex conjugates are added, ___________ components results.
A. In-phase
C. Complex
D. Out-of-phase
Solution:
124. If an emf in circuit A produces a current in circuit B, then the same emf in circuit B
produces the same current in circuit A. this theorem is known as
A. Maximum power transfer theorem
B. Millman’s theorem
C. Reciprocity theorem
D. Norton’s theorem
Solution:
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125. According to Gauss theorem, flux can be equated to
A. Charge
B. Field intensity
C. Current
D. Voltage
Solution:
126. An open resistor when checked with an ohmmeter reads
A. Zero
B. Infinite
C. High but within the tolerance
D. Low but not zero
Solution:
127. Norton’s theorem is _________ Thevenin’s theorem.
A. The same as
B. The converse of
C. Older that
D. More accurate than
Solution:
128. What value of R is needed with a 0.05 μF C for an RC time constant of 0.02 s?
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A. 400 Ω
B. 400 MΩ
C. 400 GΩ
D. 400 kΩ
Solution:
129. Which of the following is the statement of Ohm’s law?
A. Electric current is directly proportional to both voltage and resistance
B. Electric current varies directly as the voltage and inversely as the resistance
C. Electrical power is directly proportional to the resistance and inversely as the current
squared
D. Electrical power is directly proportional to both voltage squared and the resistance
Solution:
130. The admittance of a parallel RLC circuit is found to be the _________ sum of
conductance and susceptances.
A. Algebraic
B. Arithmetic
C. Vector
D. Phasor
Solution:
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131. A wire of one kilometer length has a resistance of 20 Ω. If the length is halved, then
the new resistance is __________ the original resistance.
A. Half
B. Twice
C. One-fourth
D. Three times
Solution:
132. A series-parallel combination of identical resistors will
A. Increase the power rating compared with one resistor alone
B. Increase the voltage rating compared with one resistor alone
C. Reduce the voltage rating compared with resistor alone
D. Result in an expensive circuit
Solution:
133. The _________ of an alternating quantity is defined as the fractional part of a
period or cycle through which the quantity has advanced from selected origin.
A. Phase
B. Frequency
C. Amplitude
D. Waveform
Solution:
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134. An inductive circuit of resistance 16.5 Ω and inductance of 0.14 H takes a current
of 25 A. if the frequency is 50 Hz, find the supply voltage.
A. 1501 V
B. 1174 V
C. 1877 V
D. 991 V
Solution:
135. Which of the following has a positive temperature coefficient?
A. Mica
B. Manganin
C. Silicon
D. Carbon
Solution:
136. The ratio of the flux density to the electric field intensity in the dielectric is called
A. Permittivity
B. Field intensity
C. Permeability
D. Elasticity
Solution:
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137. It is impossible to change the voltage across a capacitor instantly, as this would
produce ____________ current.
A. Infinite
B. Zero
C. Low
D. High
Solution:
138. Which of the following is not a factor affecting capacitance of a basic capacitor?
A. Area of plates
B. Number of plates
C. Distance between plates
D. Dielectric material used
Solution:
139. When voltage is applied across a ceramic dielectric the electrostatic field produced
is 50 times greater than air dielectric. The dielectric constant of ceramic therefore is
A. 50
B. 100
C. 16.67
D. 5
Solution:
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140. The reason why alternating current can induce voltage is
A. It has high peak value
B. It has a stronger magnetic field than direct current
C. It has a constant magnetic field
D. It has a varying magnetic field
Solution:
141. When two unequal values of resistors are connected in parallel across a dc source,
greater current flows through the
A. Higher resistance
B. Lower resistance
C. Higher wattage resistance
D. Lower wattage resistance
Solution:
142. A real current source has
A. Infinite internal resistance
B. Zero internal resistance
C. Large internal resistance
D. Small internal resistance
Solution:
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143. What is the cross-sectional are of a conductor whose diameter is 0.001 inch?
A. One micron
B. One angstrom
D. One circular mil
Solution:
144. Which of the following describes the action of a capacitor?
A. Stores electrical energy
B. Opposes changes in current flow
C. Creates a dc resistance
D. Converts ac to dc
Solution:
145. High resistance values are a consequence of the ___________ of the film.
A. Thickness
B. Length
C. Thinness
D. Area
Solution:
146. For parallel capacitors, total charge is
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A. The sum of individual charges
B. Equal to the charge of either capacitors
C. Equal to the product of the charges
D. The quotient of the charges
Solution:
147. Which waveform in which the rms value and the mean value are equal?
A. Square wave
B. Triangular wave
C. Sine wave
D. Sawtooth
Solution:
148. In a series circuit with unequal resistances the
A. Highest R has the highest V
B. Lowest R has the highest V
C. Lowest R has the highest I
D. Highest R has the highest I
Solution:
149. In a parallel bank with unequal branch resistances
A. The highest R has the highest I
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B. The lowest R has the highest I
C. The lowest R has the lowest V
D. The highest R has the highest V
Solution:
150. A rheostat is a form of
A. Variable resistor
B. Variable capacitor
C. Potentiometer
D. Thermocouple