InterviewSolution

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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.

1.	If the current flowing through an inductor of inductance 0.3Henry is 5.3t^2+4.7t. Calculate the power.(a) 0(b) 1(c) 16.854t^3+22.41t^2+6.62t(d) 15.3t^3+27.8t^2+19The question was posed to me at a job interview.My question is taken from Inductor and Capacitor in portion Inductance, Capacitance, and Mutual Inductance of Electric Circuits
Answer» The CORRECT answer is (C) 16.854t^3+22.41t^2+6.62t To explain I WOULD say: P= Li(di/dt).

2.	The insulating medium between the two plates of capacitor is known as __________(a) Electrode(b) Capacitive medium(c) Conducting medium(d) DielectricI have been asked this question during an interview.My question is taken from Inductor and Capacitor in portion Inductance, Capacitance, and Mutual Inductance of Electric Circuits
Answer» Right CHOICE is (d) Dielectric For EXPLANATION: The conducting SURFACES are CALLED electrodes and the INSULATING medium is called Dielectric.

3.	An Inductor works as a ___________ circuit for DC supply.(a) Open(b) Short(c) Polar(d) Non-polarI got this question in a national level competition.My question comes from Inductor and Capacitor in portion Inductance, Capacitance, and Mutual Inductance of Electric Circuits
Answer» CORRECT option is (B) Short The best I can explain: INDUCED voltage across an inductor is zero if the current flowing through it is constant. I.e. Inductor WORKS as a short CIRCUIT for DC supply.

4.	If the voltage across a capacitor is constant, then current passing through it is ________(a) 1(b) 0(c) -1(d) InfinityThis question was posed to me at a job interview.My enquiry is from Inductor and Capacitor topic in division Inductance, Capacitance, and Mutual Inductance of Electric Circuits
Answer» The CORRECT CHOICE is (B) 0 The best explanation: I= C*(dv/dt).

5.	The voltage applied to the 212mH inductor is given by v(t)= 15e^-5tv. Calculate the current.(a) 16.782e^-10t(b) 15.75e^-5t(c) 11.27e^-10t(d) 14.15e^-5tI got this question during an interview.I'd like to ask this question from Inductor and Capacitor topic in chapter Inductance, Capacitance, and Mutual Inductance of Electric Circuits
Answer» CORRECT ANSWER is (d) 14.15e^-5t The EXPLANATION: CURRENT I(t)= 1/L0∫tv*DT.

6.	If a capacitor of capacitance 9.2F has a voltage of 22.5V across it. Calculate the energy of the capacitor.(a) 5062.5W(b) 506.25W(c) 50.625W(d) 50625WI have been asked this question in an interview for internship.This intriguing question originated from Inductor and Capacitor in portion Inductance, Capacitance, and Mutual Inductance of Electric Circuits
Answer» RIGHT ANSWER is (B) 506.25W The EXPLANATION: E= ½ cv^2.

7.	The voltage applied to a pure capacitor of 50*10^-6 F is as shown in figure. Calculate the current for 0-1msec.(a) 5A(b) 1A(c) -5A(d) -1AThe question was asked in exam.Question is taken from Inductor and Capacitor topic in chapter Inductance, Capacitance, and Mutual Inductance of Electric Circuits
Answer» The correct option is (a) 5A Explanation: For 0≤t≤1msec, V (t) =mt (y=mx form) →100= 110^-3m →m= 110^5 → V (t) = 110^5t Current I (t) = c. d (v (t))/DT = 5010^-6* (d (1*10^5t)/dt) = 5A.

8.	The units for inductance is _________ and capacitance is ___________(a) Faraday, Henry(b) Coulomb, Faraday(c) Henry, Faraday(d) Henry, CoulombThe question was posed to me in homework.Question is taken from Inductor and Capacitor topic in section Inductance, Capacitance, and Mutual Inductance of Electric Circuits
Answer» The correct OPTION is (c) Henry, FARADAY Best EXPLANATION: The unit for INDUCTANCE is ‘Henry’ and capacitance is ‘Faraday’.

9.	The expression for energy of an inductor ____________(a) ½ LI(b) L/2I(c) ½ L^2I(d) ½ LI^2This question was posed to me in an international level competition.Origin of the question is Inductor and Capacitor in section Inductance, Capacitance, and Mutual Inductance of Electric Circuits
Answer» The correct answer is (d) ½ LI^2 Best EXPLANATION: E=∫p DT =∫ LI*(dI/dt).dt = L∫I dI = ½ LI^2.

10.	The Inductor doesn’t allow sudden changes in ___________(a) Voltage(b) Current(c) Resistance(d) InductanceThis question was addressed to me in an interview for job.This question is from Inductor and Capacitor topic in division Inductance, Capacitance, and Mutual Inductance of Electric Circuits
Answer» Correct option is (b) Current Explanation: Any small change in current OCCURS within zero TIME across the gives an infinite VOLTAGE which is practically IMPOSSIBLE. So, in a fixed INDUCTOR, the voltage cannot change abruptly.

11.	The capacitor doesn’t allow sudden changes in___________(a) Voltage(b) Current(c) Resistance(d) CapacitanceI got this question during an interview.This interesting question is from Inductor and Capacitor in chapter Inductance, Capacitance, and Mutual Inductance of Electric Circuits
Answer» Correct option is (a) Voltage To explain I would say: Any small change in voltage occurs within zero time across the gives an INFINITE current which is PRACTICALLY impossible. So, in a FIXED CAPACITOR, the voltage cannot change ABRUPTLY.

12.	The formula used to find the capacitance C is__________(a) Q/v(b) Qv(c) Q-v(d) Q + vThis question was addressed to me by my school teacher while I was bunking the class.The above asked question is from Inductor and Capacitor in division Inductance, Capacitance, and Mutual Inductance of Electric Circuits
Answer» CORRECT ANSWER is (a) Q/v The BEST I can EXPLAIN: Q=cv. Q-charge, V-voltage, c-capacitance.