1000 Basic Electrical Engineering MCQs - Best For Practice
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Course
Basic Electrical Engineering
Institution
Basic Electrical Engineering
1000 Basic Electrical Engineering MCQs - Best For Practice
1000 BASIC
ELECTRICAL
ENGINEERING
MCQS
Basic Electrical Engineering Questions and
Answers – Oscillation of Energy at Resonance
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This set of Basic Electrical Engineering Multiple Choice Questions & Answers...
, Basic Electrical Engineering Questions and
Answers – Oscillation of Energy at Resonance
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This set of Basic Electrical Engineering Multiple Choice Questions & Answers (MCQs) focuses on
“Oscillation of Energy at Resonance”.
1. The energy stored in the capacitor is of _________ nature.
a) Electrostatic
b) Magnetic
c) Neither electrostatic nor magnetic
d) Either electrostatic or magnetic
View Answer
Answer: a
Explanation: Since capacitor stores charge in between the plates and energy associated with static
charge is of electrostatic nature, so we can say energy stored in the capacitor is of electrostatic nature.
2. The energy stored in the inductor is of _________ nature.
a) Electrostatic
b) Magnetic
c) Neither electrostatic nor magnetic
d) Either electrostatic or magnetic
View Answer
Answer: b
Explanation: Since inductor stores current which involves moving charge and energy associated with
moving charge is of magnetic nature so we can say energy stored in the inductor is of magnetic nature.
3. At resonance, the circuit appears __________
a) Inductive
,b) Capacitive
c) Either inductive or capacitive
d) Resistive
View Answer
Answer: d
Explanation: At resonance, the circuit appears resistive because the capacitive and inductive energies
are equal to each other.
4. At resonance, the capacitive energy is ___________ inductive energy.
a) Greater than
b) Less than
c) Equal to
d) Depends on the circuit
View Answer
Answer: c
Explanation: At resonance, energy stored in the capacitor is equal to energy stored in the inductor
because capacitive reactance and inductive reactance are equal at resonance. So, at resonance,
capacitive energy is equal to inductive energy.
5. At resonance, electrostatic energy is ___________ the magnetic energy.
a) Greater than
b) Less than
c) Equal to
d) Depends on the circuit
View Answer
Answer: c
Explanation: At resonance, energy stored in the capacitor is equal to energy stored in the inductor
because capacitive reactance and inductive reactance are equal at resonance. The capacitor stores
electrostatic energy and the inductor stores magnetic energy hence they are equal.
, 6. The maximum magnetic energy stored in an inductor at any instance is?
a) E=LIm2/2
b) E=LIm/2
c) E=LIm2
d) E=LIm2*2
View Answer
Answer: a
Explanation: At any instant, the magnetic energy stored in an inductor is E=LIm2/2, where Im is the
maximum current and L is the value of the inductor.
7. The maximum electrostatic energy stored in a capacitor at any instance is?
a) CVm2
b) 1/2*CVm2
c) CVm
d) CVm/2
View Answer
Answer: b
Explanation: The maximum electrostatic energy stored in a capacitor at any instance is 1/2*CVm2,
where C is the capacitance value and Vm is the peak voltage.
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