Description : A unit step voltage is applied at t = 0 to a series RL circuit with zero initial conditions A) It is possible for the current to be oscillatory B) The voltage across the resistor at t ... The energy stored in the inductor in the steady state is zero D) Theresistor current eventually falls to zero
Last Answer : A
Description : The potentiak difference across a 2H inductor as a function of time is shown in the figure. At time t=0, current is zero. Current versus time graph ac
Last Answer : The potentiak difference across a 2H inductor as a function of time is shown in the figure. At time t=0, ... across the inductor will be A. B. C. D.
Description : The potential difference across a `2 H` inductor as a function of time is shown in figure. At time `t=0`, current is zero Current `t = 2` second is
Last Answer : The potential difference across a `2 H` inductor as a function of time is shown in figure. At time `t=0`, current is ... B. `3 A` C. `4 A` D. `5 A`
Description : P-n junction when reversed biased acts as a (a) Capacitor (b) inductor (c) on switch (d) off switch
Last Answer : d) off switch
Description : When the initial conditions of a system are specified to be zero it implies that the system is?
Last Answer : When the initial conditions of a system are specified to be zero it implies that the system is at rest but stores energy.
Description : In the circuit shown in figure switch S is closed at time t=0 At what time current through `3Omega` resistance and 1H inductor are equal?
Last Answer : In the circuit shown in figure switch S is closed at time t=0 At what time current through `3Omega` resistance and ... 5)/(3))` D. `Insqrt((8)/(3))`
Description : The current in ampere through an inductor is i(10+20t) Here t is in second. The induced emf in the inductor 4V. Total flux linked with the inductor at
Last Answer : The current in ampere through an inductor is i(10+20t) Here t is in second. The induced emf in the inductor 4V. ... 10 Wb B. 20 Wb C. 30 Wb D. 40 Wb
Description : The current in ampere through an inductor is i(10+20t) Here t is in second. The induced emf in the inductor 4V. The self inductance of the indicator i
Last Answer : The current in ampere through an inductor is i(10+20t) Here t is in second. The induced emf in the inductor 4V. The ... B. `0.4` C. `0.1` D. `1.0`
Description : Explain the concept of initial and final conditions in switching for L and C.
Last Answer : i) Inductor: The current through an inductor cannot change instantly. If the inductor current is zero just before switching, then whatever may be the applied voltage, just after switching the inductor ... open-circuit. The initial and final conditions are summarized in following table:
Description : At equilibrium the concentration of water in vapour phase (C* ) in kg/m3 of air space and the amount of water (m) adsorbed per kg of dry silica gel are related by, C* = 0.0667m. To maintain dry conditions in a room ... which the temperature is maintained constant) is (A) 0.0 (B) 0.2 (C) 0.4 (D) 1.0
Last Answer : (C) 0.4
Description : Why inductor current lags inductor voltage ?
Last Answer : Inductor is a wire wounding structure having a core material it induces emf which is opposite to the voltage supply and proportional to rate of change of current so current lags the voltage in inductor
Description : Explain operation of series inductor filter and find out its ripple factor.
Last Answer : Circuit diagram of series inductor filter : Operation of Series Inductor Filter : A high value of inductor is connected in series with load. Then the combination is connected across the rectifier. ... Hence increase in current reduces ripple factor. Ripple Factor:- RF = R / 3√2 ω L
Description : Related to inductor state (i) any two types (ii) any two applications
Last Answer : Ans: i) Types of inductors & their applications: 1) Iron core inductors: Used in Low frequency applications such as filter chokes, amplifiers 2) Air core inductors: Used in high ... frequency upto 100MHz applications such as oscillators, RF amplifiers, Radio and TV receivers, signal generators.
Description : An inductor of Q factor 10 is connected in series with a capacitor having a Q factor of 100. The overall Q factor of the circuit is : (A) 100/11 (B) 11/100 (C) 110 (D) 1000
Last Answer : An inductor of Q factor 10 is connected in series with a capacitor having a Q factor of 100. The overall Q factor of the circuit is : 100/11
Description : What is the reactance of a 3H inductor when the frequency is 120 Hz? A. 2260 ohm B. 2060 ohm C. 360 ohm D. 0
Last Answer : 2260 ohm is the reactance of a 3H inductor when the frequency is 120 Hz.
Description : A pure inductor has power factor of (a) 1 (b) 1/ 2 (c) 0 (d) None of these
Last Answer : Zero The current lags behind voltage by 90 degrees in case of a pure inductor Therefore the power factor = cos{angle between voltage and current} = cos(90) = 0
Description : What is application of inductor?
Last Answer : Inductors are use in analog circuits.
Description : What is the difference between a coil and an inductor?
Last Answer : Inductor is covering with insulating material is called coil.so they differentiate between coil and inductor.
Description : A sine wave voltage is applied across an inductor. When the frequency of the voltage is decreased, the current decreases.
Last Answer : The question seems to be wrong. Increase in frequency would actually decrease the current through the Inductor. This happens because inductive reactance Xl is directly proportional to frequency. And if frequency increases the value of Xl would ... vice versa. Xl= 2*pi*f*L I=E/Z Z=sqrt(R^2+Xl^2)
Description : Initial gap between two turns of a close coil helical tension spring should be a. 0.5 mm b. based on the maximum deflection c. 1 mm d. zero
Last Answer : d. zero
Description : A capacitor of capacity `2muF` is changed to a potential different of `12V` . It is then connected across an inductor of inductance `0.6mH` What is th
Last Answer : A capacitor of capacity `2muF` is changed to a potential different of `12V` . It is then ... potential difference across the capacitor is `6.0V` ?
Description : An L-C circuit contains a 0.60 H inductor and a `25muF` capacitor is `3.0xx10^(-5)C?`
Last Answer : An L-C circuit contains a 0.60 H inductor and a `25muF` capacitor is `3.0xx10^(-5)C?`
Description : The energy stored in the inductor 100mH with a current of 2A is a) 0.2 b) 0.4 c) 0.6 d) 0.8 View Ans
Last Answer : a) 0.2
Description : A 25 cm 25 cm 1 cm flat sheet weighing 1.2 kg initially was dried from both sides under constant drying rate conditions. It took 1500 seconds for the weight of the sheet to reduce to 1.05 kg. Another 1m 1m 1cm ... 19.2 kg to 17.6 kg is (A) 1000 (B) 1500 (C) 2000 (D) 2500
Last Answer : (A) 1000
Description : “The enthalpy change for any chemical reaction is independent of the intermediate stages, provided the initial and final conditions are the same for each route.” This statement is known as: A. Dulong’s Law B. Dalton’s Law C. Hess’s Law D. Petit Law
Last Answer : Hess’s Law
Description : A series of operations, which takes place in a certain order and restore the initial conditions at the end, is known as A. reversible cycle B. irreversible cycle C. thermodynamic cycle D. none of these
Last Answer : Answer: C
Description : Consider the following conditions : (a) The solution must be feasible, i.e. it must satisfy all the supply and demand constraints. (b) The number of positive allocations must be equal to m+n-1, where m is the number of rows and n is ... B) (a) and (c) only (C) (b) and (c) only (D) (a), (b) and (c)
Last Answer : (D) (a), (b) and (c)
Description : Explain the concept of initial and final conditions in switching circuits for elements R and L.
Last Answer : Concept of Initial and final condition in switching circuits for R: Consider a resistor is connected to a voltage source, using a switch as shown in fig below The switch is closed ... of value Io in parallel with short circuit.(I0 is the current in inductor just before switching)
Description : Why is the initial velocity zero in the case of a falling object ?
Last Answer : Because the falling object starts falling from a fixed position. So its forward velocity is taken to be zero.
Description : Can the initial value of a function be zero?
Last Answer : Yes. In general, both the input and the output of a function canbe zero.
Description : When a megohmmeter is used to test the insulation of a large motor, the initial dip of the pointer toward 'zero' is caused by ____________. A. good insulation B. the capacitance of the ... of the current along the surface of dirty insulation D. the dielectric-absorption effect of the insulation
Last Answer : Answer: B
Description : When a megohmmeter is used to test the dielectric strength of wire insulation, the initial dip of the pointer toward 'zero' is caused by _____________. A. good insulation B. the leakage of ... of dirty insulation C. the capacitance of the circuit D. the dielectric absorption effect of the insulation
Description : In the initial stage of the project the probability of completing the project is ___ . (A) Zero (B) High (C) Low (D) Any of the above
Last Answer : (C) Low
Description : In the initial stage of the project the probability of completing the project is . (A)Zero (B)High (C)Low (D)Any of the above
Last Answer : (C)Low
Description : .In the initial stage of the project the probability of completing the project is ___ . A.Zero B.High C.Low D.Medium
Last Answer : C.Low
Description : Assume that a firm has accurately calculated the net cash flows relating to two mutua lly exclusive investment proposals. If the net present value of both proposals exceed zero and the firm is ... maximize shareholder wealth and, since the projects are mutually exclusive, we can only take one
Last Answer : D. accept the proposal that has the largest NPV since the goal of the firm is to maximize shareholder wealth and, since the projects are mutually exclusive, we can only take one
Description : For a zero order chemical reaction, the (A) Half life period is directly proportion to the initial concentration of the reactants (B) Plot of products concentration with time is a straight line through the origin (C) Products concentration increases linearly with time (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : The knowledge of initial concentration and rate constant is necessary to determine the half life time of a reaction of __________ order. A) Zero (B) First (C) Second (D) None of these
Last Answer : (C) Second
Description : If the time required to change the concentration of reactant to half its original value is independent of the initial concentration, the order of reaction is: (A) Zero (B) One (C) Two (D) Three
Last Answer : (B) One
Description : For a __________ order chemical reaction as shown in the bellow figure, the half life period is independent of the initial concentration of the reactant A. (A) Zero (B) First (C) Second (D) Third
Last Answer : (B) First
Description : For a zero order reaction, the concentration of product increases with the (A) Increase of reaction time (B) Increase in initial concentration (C) Total pressure (D) Decrease in total pressure
Last Answer : (A) Increase of reaction time
Description : . In a zero order reaction, reactants concentration does not change with time and the (A) Time for half change is half the time taken for completion of the reaction (B) Time for ... is independent of the initial concentration (D) Reaction rate is trebled when the initial concentration is trebled
Last Answer : (A) Time for half change is half the time taken for completion of the reaction
Description : If a system after undergoing a series of processes, returns to the initial state then (a) process is thermodynamically in equilibrium (b) process is executed in closed system cycle (c) its entropy will ... sum of heat and work transfer will be zero (e) no work will be done by the system.
Last Answer : Answer : d
Description : Consider the following salient points in a stress-strain curve of a mild steel bar: 1. Yield point 2. Braking point 3. Yield plateau 4 . Proportionality limit 5. Ultimate point The correct sequence in which they occur while testing the mild ... , 5 and 2 (c) 4, 1, 3, 5 and 2 (d) 1, 4, 2, 3 and 5
Last Answer : (c) 4, 1, 3, 5 and 2
Description : In a system zero initial condition means that?
Last Answer : In a system zero initial condition means that The system is at rest and no energy is stored in any of its components.
Description : Zero initial condition for a system means?
Last Answer : Zero initial condition for a system means system is at rest and no energy is stored in any of its components.
Description : The following statement(s) is/are true concerning HIV infection. a. Initial screening with ELISA is highly sensitive but can be associated with a false positive rate of 25% b. ... , carinii pneumonia, CMV pneumonitis, Cryptococcus meningitis, and disseminated infection due to atypical mycobacteria
Last Answer : Answer: b, c, d Acquired immunodeficiency syndrome (AIDS) is a syndrome caused by the human retrovirus (HIV-1) that infects T lymphocytes and causes severe immunosuppression. Individuals who ... to prolong survival when administered early in the course of disease and is considered routine therapy
Description : The order of reaction is the number of moles whose concentrations determine the rate of a reaction at a given temperature Give the integrated equation for first order reaction. K = (2.303 / t) * log (a ... a' is the initial concentration of reactants x' is the amount reacted in time t seconds
Last Answer : What is Threshold energy ?
Description : Concentration of the limiting reactant (with initial concentration of a moles/litre) after time t is (a-x). Then 't' for a first order reaction is given by (A) k. t = ln a/(a - x) (B) k. t = x/a (a - x) (C) k. t = ln (a - x)/a (D) k. t = ln a (a - x)/x
Last Answer : (A) k. t = ln a/(a - x)
Description : For the liquid phase zero order irreversible reaction A → B, the conversion of A in a CSTR is found to be 0.3 at a space velocity of 0.1min -1 . What will be the conversion for a PFR with a space velocity of 0.2 min ... conditions are the same for CSTR and PFR. (A) 0.15 (B) 0.30 (C) 0.60 (D) 0.90
Last Answer : (C) 0.60