# Time constant of a capacitive circuit?

Time constant of a capacitive circuit?

Time constant of a capacitive circuit increase with increase of capacitance and increase of resistance.

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Last Answer : It is denoted as τ, tau and has the value of 1/RC. We

Description : The time constant of a series R-C circuit is given by?

Last Answer : The time constant of a series R-C circuit is given by RC.

Description : Time constant of a circuit is the time in seconds taken after the application of voltage to each?

Last Answer : Time constant of a circuit is the time in seconds taken after the application of voltage to each 63% of maximum value.

Description : The time constant of the capacitance circuit is defined as the time during which voltage?

Last Answer : The time constant of the capacitance circuit is defined as the time during which voltage rises to 63.2% of its final steady value.

Description : Time constant of an inductive circuit?

Last Answer : Time constant of an inductive circuit increases with increase of inductance and decrease of resistance.

Description : Time constant for RC circuit formula τ = RC Where, τ = time constant

Last Answer : Time constant for RC circuit formula τ = RC Where, τ = time constant

Description : In a pure capacitive circuit if the supply frequency is reduced to 1/2, the current will?

Last Answer : In a pure capacitive circuit if the supply frequency is reduced to 1/2, the current will be reduced by half.

Description : In a highly capacitive circuit the?

Last Answer : In a highly capacitive circuit the reactive power is more than the actual power.

Description : The time constant of the servo-mechanism can be decreased by

Last Answer : The time constant of the servo-mechanism can be decreased by decreasing the inertia of the system

Description : Capacitive reactance

Last Answer : Capacitive reactance formula

Description : Capacitive current

Last Answer : Capacitive current formula

Description : Capacitive susceptance is a measure of?

Last Answer : Capacitive susceptance is a measure of a purely capacitive circuit's ability to pass current.

Description : Capacitive reactance is more when?

Last Answer : Capacitive reactance is more when capacitance is less and frequency of supply is less.

Description : Series capacitive compensation in EHV transmission line is used to

Last Answer : To maintain voltage stability

Description : What is Capacitive coupling ?

Last Answer : Capacitive coupling is connecting a circuit to another circuit using a capacitor in order to allow only Ac signal to pass through from circuit1 to the other circuit.

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Description : Define : i) Diffuse radiation ii) Beam radiation ii) Insolation iv) Solar constant

Last Answer : i) Diffuse radiation: It is the solar radiation which is scattered by the particles in earth's atmosphere and this radiation does not have any unique direction.  ii) Beam radiation: Solar radiation ... from the sun.  OR  It is the average radiation received outside the earth's atmosphere

Description : Define the term solar constant.

Last Answer : Solar energy arrived atmosphere at a constant rate of 1350W/M²

Description : What is meant by energy meter constant?

Last Answer : Energy Meter Constant  A fixed value which is used when converting meter readings to actual energy use, especially when potential transformers and similar types of equipment are used in metering. For example, K=--------rev/Kwh

Description : Give the expression for ABCD constant of T model.

Last Answer : Expression for ABCD constants of T model:

Description : A transfer function has a second order denominator and constant gain in the numerator

Last Answer : A transfer function has a second order denominator and constant gain in the numerator the system has two zeros at infinity

Description : A dc chopper is fed from a constant voltage mains the duty ratio of chopper is progressively increased while the chopper feeds an RL load. The per unit current ripple would  (1) increase progressively  (2 ... 0.5 and then increase  (4) increase to a maximum value at α = 0.5 and then decrease

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Description : A 3 -phase, fully controlled, converter is feeding power into a DC load at a constant current of 150 A, the rms value of the current flowing through each thyristor of the converter is

Description : When the firing angle a of a single-phase, fully controlled rectifier feeding constant direct current into a load is 30°, the displacement power factor of the rectifier is

Last Answer : When the firing angle a of a single-phase, fully controlled rectifier feeding constant direct current into a load is 30°, the displacement power factor of the rectifier is √3/2

Description : While keeping the excitation constant, if the steam supply of an alternator running in parallel with another identical alternator is increased, then (A) It would over-run the other alternator (B) Its rotor ... (C) Its portion of share in load will increase (D) Its power factor would be decreased.

Last Answer : While keeping the excitation constant, if the steam supply of an alternator running in parallel with another identical alternator is increased, then Its portion of share in load will increase

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Description : The maximum constant load torque under which a synchronous motor will pull into synchronism at rated rotor supply voltage and frequency is known as?

Last Answer : The maximum constant load torque under which a synchronous motor will pull into synchronism at rated rotor supply voltage and frequency is known as pull-in torque.

Description : In an actual transformer the iron loss remains practically constant from no load to full load because?

Last Answer : In an actual transformer the iron loss remains practically constant from no load to full load because core flux remains practically constant.

Description : In a given transformer for a given applied voltage, losses which remain constant irrespective of load changes are?

Last Answer : In a given transformer for a given applied voltage, losses which remain constant irrespective of load changes are hysteresis and eddy current losses.

Description : For a transformer, operating at constant load current, maximum efficiency will occur at?

Last Answer : For a transformer, operating at constant load current, maximum efficiency will occur at unity power factor.

Description : If resistance is 20 Q. and inductance is 27 in a R-L series circuit, then time constant of this circuit will be?

Description : Briefly explain how the power factor of an inductive circuit can be improved.

Last Answer : As we know that power factor should be corrected to ensure that the current supplied is cost friendly. Meaning the power factor should be around one but not greater than one(0.8-0.9) in a ... an inductive circuit due to the inductive reactance which oppose the change of current in the ac circuit.

Description : role of tuned LC circuit in tuned amplifier.

Last Answer : In order to pick up and amplify the desired radio frequency signal, the resistive load in the audio amplifier is replaced by a tuned circuit (also called a parallel resonant circuit)as shown ... desired radio frequency signal. (ii)Amplification of the selected signal to a suitable voltage level.

Description : State Ohm’s law for electric circuit.

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Description : Define active circuit and passive circuit.

Last Answer : Active circuit: Active Circuit is one which contains at least one source of e.m.f. or energy, is called active circuit.  Passive Circuit: Passive Circuit is one which does not contain any source of e.m.f. or energy in it, is called passive circuit.

Description : Basic Circuit Elements

Last Answer : Req= (1/1200 +1/560 + 1/2.1)^-1        = 2.1 ohms RT= 2.1 + 7.8      = 9.9 ohms IT = V/R = 24/9.9                = 2.4 A Veq= R I =  2.1 2 ... 7.8         = 12.096 w                 = 44.928 w _________________________________________ By: Ellis-Junior Kamatjipose [email protected]

Description : Compare combinational logic circuit and sequential logic circuit

Last Answer : Combinational logic Sequential logic The combinational logic circuit consists of logic gate only Sequential logic circuit consists of combinational logic circuit along with memory for storage of ... , multiplexer, demultiplexer etc E.g. counters, shift registers flip-flop etc

Description : What is unilateral and bilateral circuit?

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Description : Describe the difference between an open circuit and a short circuit.

Last Answer : Open circuit means the wire is cut meaning power will not flow and close circuit means wire is not cut and hence power will flow.Short circuit is the same as close circuit

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