JE Electrical - Master Questions and Answer Keys
JE Electrical - Master Questions and Answer Keys
JE Electrical - Master Questions and Answer Keys
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JE Electrical - Master Questions and Answer Keys
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JE Electrical - Master Questions and Answer Keys
19) What is the total resistance of a circuit consisting of a parallel combination of three
resistors each of 6 Ω is connected in series with another parallel combination of two
resistors of 5 Ω each?
A) 28 Ω B) 1.11 Ω
C) 4.5 Ω D) None of these
Correct Answer: C
20) Three equal value resistors are first connected in series then in parallel. What is the ratio of
resultant resistance of the series combination to the parallel combination?
A) 0.3333 B) 3
C) 9 D) None of these
Correct Answer: C
21) Consider a parallel circuit with four resistors of values 100 Ω, 50 Ω, 25 Ω and X Ω. What
is the value of X if current through 25 Ω resistance is 5 A and the total current of the
supply is 15 A?
A) 125 Ω B) 20 Ω
C) 6.25 Ω D) None of these
Correct Answer: B
22) When two resistances are connected in series, the total resistance of the circuit was 50 Ω.
What are the individual values of these two resistors if the total resistance turned out to be
8 Ω when they are connected in parallel?
A) 20 Ω and 30 Ω B) 10 Ω and 40 Ω
C) 25 Ω and 25 Ω D) None of these
Correct Answer: B
23) Two equal value resistors connected in series to a particular voltage source dissipate 40 W.
What is the power dissipated if the same two resistors are connected in parallel to the same
voltage source?
A) 160 W B) 40 W
C) 80 W D) None of these
Correct Answer: A
24) What is the resistance of a bulb which is rated 200 W, 220 V?
A) 200 Ω B) 1100 mΩ
C) 242 Ω D) None of these
Correct Answer: C
25) What is the resistance between any two of the corners when three 15 Ω resistors are
connected to form a triangle?
A) 10 Ω B) 30 Ω
C) 15 Ω D) None of these
Correct Answer: A
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JE Electrical - Master Questions and Answer Keys
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JE Electrical - Master Questions and Answer Keys
35) What is the voltage when the current passing through a coil with 70 mH induction, changes
at a uniform rate from 2 A to 5 A in 0.1 sec?
A) 21 V B) 2.1 V
C) 700 mV D) None of these
Correct Answer: B
36) What is the voltage when an appliance rated at 600 W and having a resistance of 6 Ω?
A) 60 V B) 3600 V
C) 6 V D) None of these
Correct Answer: A
37) What is the bandwidth when a RLC circuit has a Q-factor of 120 and a resonance
frequency of 180 kHz?
A) 1.5 kHz B) 666.67 Hz
C) 150 Hz D) None of these
Correct Answer: A
38) What is the resistance of the coil whose time constant is 2 and value of its inductor is 15
H?
A) 7.5 Ω B) 15 Ω
C) 30 Ω D) None of these
Correct Answer: C
39) Superposition theorem is applicable to which of the following?
A) Networks with non-linear elements B) Networks with linear elements
C) Both A and B D) None of these
Correct Answer: B
40) What is the energy required to charge a 15 µF capacitor to 200 V?
A) 0.3 J B) 3 J
C) 300000 J D) None of these
Correct Answer: A
41) A network which does not contain any active device is called _______
A) Idle network B) Ideal network
C) Active network D) Passive network
Correct Answer: D
42) What is number of revolutions made when a single phase watt meter operating on 200 V
and 6 A for 4 hours given that the meter constant in revolutions is 420 assuming a power
factor of 1?
A) 2016 B) 1920
C) 420 D) None of these
Correct Answer: A
43) Which of the following is used to measure mutual inductance?
A) Heaviside Campbell Bridge B) Schering bridge
C) Common bridge D) None of these
Correct Answer: A
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JE Electrical - Master Questions and Answer Keys
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JE Electrical - Master Questions and Answer Keys
53) Which of the following are important characteristics of a good transformer oil?
A) Lower volatility B) Higher flash point
C) Moisture tolerance D) All the above
Correct Answer: D
54) A step-down transformer reduces the ______
A) Frequency B) Current
C) Voltage D) All the above
Correct Answer: C
55) What is the ideal shape for the cross section of the core of a transformer?
A) Square B) Hexagonal
C) Triangular D) Circular
Correct Answer: D
56) What is the speed of a four pole single phase induction motor operating on 220 V and 60
Hz?
A) 1800 rpm B) 1800 rps
C) 880 rpm D) None of these
Correct Answer: A
57) Which of the following is a self starting motor?
A) Single phase induction motor B) Polyphase induction motor
C) Both A and B D) None of these
Correct Answer: B
58) Which of the following is an induction motor rotor type?
A) Squirrel cage rotor B) Wound rotor
C) Both A and B D) None of these
Correct Answer: C
59) What is M. N. A. in the context of DC motors?
A) Minimum Natural Alignment B) Magnetic Neutral Axis
C) Magnetized Natural Alignment D) None of these
Correct Answer: B
60) Which of the following is the material commonly used for brushes in a DC motor?
A) Aluminum B) Silver
C) Carbon D) None of these
Correct Answer: C
61) What is the efficiency of a generator which delivers 30 A at 150 V, when supplied with a
mechanical energy at the rate of 5000 J/second?
A) 95% B) 90%
C) 92% D) None of these
Correct Answer: B
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JE Electrical - Master Questions and Answer Keys
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JE Electrical - Master Questions and Answer Keys
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JE Electrical - Master Questions and Answer Keys
79) Which of the following materials is a good conductor of heat but bad conductor of
electricity?
A) Asbestos B) Mica
C) Mercury D) Nickel
Correct Answer: B
80) Which of the following rivers do not originate in India?
A) Ganga B) Yamuna
C) Brahmaputra D) Godavari
Correct Answer: C
81) Identify the odd one out?
A) Amartya Sen B) Rabindranath Tagore
C) Mahatma Gandhi D) Mother Teresa
Correct Answer: C
82) How many times has India hosted the Asian Games?
A) One B) Two
C) Three D) Never
Correct Answer: B
83) Who succeeded Pandit Jawaharlal Nehru as the Prime Minister of India?
A) Lal Bahadur Shastri B) Indira Gandhi
C) Morarji Desai D) Gulzarilal Nanda
Correct Answer: D
84) The minimum educational qualification to contest for the post of member of Parliament in
India is
A) Graduate B) Post Graduate
C) SSLC or its equivalent D) None of these
Correct Answer: D
85) A circular field has a diameter of 14 meters. The field is divided in to four separate
quadrants. What is the cost of fencing one quadrant at Rs. 100 per meter?
A) Rs. 2500 B) Rs. 5800
C) Rs. 3600 D) Rs. 4400
Correct Answer: A
86) A number was first increased by 35% and then it is further increased by 42%. The increase
altogether as compared to the original number is
A) 77% B) 91.7%
C) 7% D) None of the above
Correct Answer: B
87) The national flower of India is
A) Rose B) Lotus
C) Hibiscus D) None of these
Correct Answer: B
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JE Electrical - Master Questions and Answer Keys
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JE Electrical - Master Questions and Answer Keys
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