What is the formula to find the capacitance in a circuit? 

1 Answer

Answer :

C = Q/E farad. 

Related questions

Description : The formula for computing impedance in a series circuit containing resistance, capacitance, and inductance is _____________. [ NOTE: the symbol * stands for 'multiplied by' ] A. Z = RT + XL + XC B. Z = R + XL - XC C. Z * Z = R * R + (XL - XC) * (XL - XC) D. Z = R * R + (XL * XC) - (XL * XC)

Last Answer : Answer: C

Description : In the schematic of the electrical circuit shown in the illustration, what is the value of the total capacitance, when compared to the value of equal individual capacitors? EL-0038 A. Equal B. Half C. Double D. Squared

Last Answer : Answer: C

Description : In the illustrated circuit, one advantage of the capacitor coupling over direct coupling is ____________. EL-0048 A. as the frequency decreased the capacitive reactance (Xc) increases B. the amplifier becomes ... of the signal while it isolates the biasing of each stage. D. good frequency response.

Last Answer : Answer: C

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

Last Answer : Answer: C

Description : Capacitance is the property of an electric circuit opposing a change in the _____________. A. current in the circuit B. voltage in the circuit C. inductance in the circuit D. resistance in the circuit

Last Answer : Answer: B

Description : Capacitance in an AC circuit will _____________. A. stop current flow once the capacitor is fully charged B. allow current flow in only one direction C. oppose any change in circuit voltage D. rectify the current

Last Answer : Answer: C

Description : An AC circuit has capacitance arranged in series. If the line voltage remains constant, the capacitive reactance value can be varied by changing the _____________. A. line frequency B. resistance C. number of commutating poles D. number of interpoles

Last Answer : Answer: A

Description : Basically, a magnetic amplifier is a saturable reactor with the addition of _____________. A. AC to the bias winding B. variable capacitance to all windings C. eddy current protectors D. a rectifier in the load circuit

Last Answer : Answer: D

Description : AC circuits develop resistance, inductance, and capacitance. The inductive reactance of a circuit is expressed in _____________. A. ohms B. mhos C. henrys D. farads

Last Answer : Answer: A

Description : AC circuits possess characteristics of resistance, inductance, and capacitance. The capacitive reactance of a circuit is expressed in _____________. A. ohms B. mhos C. henrys D. farads

Last Answer : Answer: A

Description : What is the relation between voltage and current in AC circuit containing only capacitance?

Last Answer : Current (I) is leading the voltage by 90°. I = V/XC amps. XC = 1/2πfC ohms. P = I * V * cosϕ watts. (Where cosϕ is 90 because current is leading the voltage by 90°. So cosϕ 90° = 0) ∴ P = I * V * 0 = 0 watts.

Description : What is the resultant capacitance in series and parallel circuit? 

Last Answer : In series circuit the resultant capacitance 1/CT = 1/c1+1/c2 + 1cn farad. In parallel circuit the resultant capacitance CT = c1 + c2 + cn farad. 

Description : Energy stored in electrostatic field of capacitance formula

Last Answer : Energy stored in electrostatic field of capacitance formula

Description : Capacitance

Last Answer : Capacitance formula

Description : Which of the following parameters is not a primary parameter? a) Resistance b) Attenuation constant c) Capacitance d) Conductance

Last Answer : Ans: B

Description : The value of the capacitance depends upon the________________? A.voltage applied B. thickness of the capacitor plates C. geometry of the capacitor D. dinsity of the capacitor plates

Last Answer : Ans: C

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 using a megohmmeter to test the dielectric strength of wire insulation, a continuous series of slight downscale kicks by the pointer is result of ____________. A. good insulation B. the ... dirty insulation C. the capacitance of the windings D. the dielectric-absorption effect of the insulation

Last Answer : Answer: B

Description : The basic control action of a magnetic amplifier depends upon _____________. A. variations in the load capacitance B. changes in inductance C. type of core material D. construction of the core

Last Answer : Answer: B

Description : On tank vessels with an electrically-driven capstan, the motor should be meggered periodically to test _____________. A. insulation resistance B. eddy currents C. capacitance D. armature reactance

Last Answer : Answer: A

Description : Alternating current circuits develop resistance, inductance, and capacitance. The capacitance of individual capacitors is expressed in _____________. A. ohms B. mhos C. henrys D. farads

Last Answer : Answer: D

Description : Alternating current circuits develop resistance, inductance and capacitance. The inductance of a coil is expressed in _____________. A. ohms B. mhos C. henrys D. farads

Last Answer : Answer: C

Description : The Wheatstone bridge is a precision measuring instrument utilizing the principle of changes in _____________. A. inductance B. capacitance C. resistance D. amperage

Last Answer : Answer: C

Description : What is the purpose of CVT (capacitance voltage transformer)?

Last Answer : Purposes of CVT are a. To indicate if line is charged or not. b. To synchronize grid with generator. c. For power line communication and carrier tripping. 

Description : What is capacitance and capacitive reactance?

Last Answer : Capacitance The property of a capacitor to store electrical energy in it, when it is connected to an electric supply is called capacitance. Unit for measurement is farad. Capacitor store an electric ... called capacitive reactance and it denoted by the letter XC. The unit for measurement is ohm.

Description : Over lap Angle depends on_________ a) Load inductance b) Loa capacitance c) Source inductance d) Source capacitance

Last Answer : Ans: Source inductance

Description : Hays bridge is used to measure___________ and Schering bridge is used to measure____________ a) Inductance, Inductance b) Inductance, Capacitance c) Capacitance, Inductance d) Resistance, Capacitance

Last Answer : Ans: Inductance, Capacitance

Description : Reduction in the capacitance of a capacitor-start motor, results in reduced (A) Noise. (B) Speed. (C) Starting torque. (D) Armature reaction.

Last Answer : Ans: C Reduction in the capacitance reduces starting voltage, which results in reduced starting torque.

Description : The latest PC keyboards use a circuit that senses the movement by the change in its capacitance, A) Capacitance keyboard B) Mechanical keyboard C) Qwerty keyboard D) Dvorak keyboard

Last Answer : Answer : A

Description : The fuse in our domestic electric circuit melts when there is a high rise in – (1) Inductance (2) Current (3) Resistance (4) Capacitance

Last Answer : (2) Current Explanation: In electronics and electrical engineering, a fuse is a type of low resistance resistor that acts as a sacrificial device to provide over protection, of either the load ... fuse interrupts excessive current (blows) so that further damage by overheating or fire is prevented.

Description : Which of the following circuit elements is used to 'block' DC in an electronic circuit? (1) Resistances (2) Capacitance (3) Inductance (4) Diode

Last Answer : (2) Capacitance Explanation: A capacitor (originally known as condenser) is a passive two-terminal electrical component used to store energy in an electric field. Capacitors are widely used ... electric power transmission systems for stabilizing voltage and power flow, and for many other purposes.

Description : The latest PC keyboards use a circuit that senses the movement by the change in its capacitance, a. Capacitance keyboard b. Mechanical keyboard c. Qwerty keyboard d. Dvorak keyboard

Last Answer : Capacitance keyboard

Description : The latest PC keyboards use a circuit that senses the movement by the change in its capacitance, a. Capacitance keyboard b. Mechanical keyboard c. Qwerty keyboard d. Dvorak keyboard

Last Answer : a. Capacitance keyboard

Description : In AC Circuit Theory, the term that replaces the resistance is: w) inductance x) capacitance y) impedance z) reactance

Last Answer : ANSWER: Y -- IMPEDANCE

Description : Which of the following circuit elements is used to ‘block’ DC in an electronic circuit ? (1) Resistances (2) Capacitance (3) Inductance (4) Diode

Last Answer : Capacitance

Description : An a.c series circuit has resistance of 10ohm, inductance of 0.1H and capacitance of 10µf, voltage applied to circuit is 200V. find (i) Resonant frequency (ii) Current at resonance (iii) Power at resonance 

Last Answer : Solution: For RLC series circuit

Description : Three capacitors 15µf, 18µf and 12µf are connected in a circuit. Find equivalent capacitance when they are connected in – 1) Series 2) Parallel

Last Answer : Ans: Value of equivalent capacitance: Given: C1= 15μF, C2=18 µF, C3= 12µF  i)For Series combination of capacitors: 1/Cs = (1/C1)+( 1/C2) +(1/C3) = (1/15)+( 1/18)+( 1/12) 1/Cs = 0.0666+0.0555+0. ... Cs = 4.868 µF   ii) For parallel combination of capacitors: Cp = C1 + C2 + C3 = 15 +18+ 12 = 45 µF 

Description :  To a highly inductive circuit, a small capacitance is added in series. The angle between voltage and current will _____.

Last Answer :  To a highly inductive circuit, a small capacitance is added in series. The angle between voltage and current will decrease.

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 : In series resonant circuit, increasing inductance to its twice value and reducing capacitance to its half value?  

Last Answer : In series resonant circuit, increasing inductance to its twice value and reducing capacitance to its half value will increase the selectivity of the circuit.

Description : A cylindrical cable of core radius 1.25cm and impregnated paper insulation of thickness 2.13cm and relative permittivity 3.5. Compute the capacitance of the cable/km (in nF

Last Answer : To calculate the capacitance of the cable per kilometer, you can use the following formula: C = ε * ε0 * A / d where: C is the capacitance of the cable per kilometer (in farads) ε is ... * 10^9 = 644 nF/km So the capacitance of the cable per kilometer would be approximately 644 nanofarads.

Description : What is the effect of resistance , inductance and capacitance in transmission line ?

Last Answer : These 3 factors create voltage drop and power loss of the line. The inductive reactance creates a voltage drop across the line and the capacitance creates a charging current.

Description : Why is the capacitance ignored in the short transmission line ?

Last Answer : Capacitance is ignored due to low line length and low line voltage.

Description : A capacitor of capacitance `C` carrying charge `Q` is connected to a source of emf `E`. Finally, the charge on capacitor would be

Last Answer : A capacitor of capacitance `C` carrying charge `Q` is connected to a source of emf `E`. Finally, the charge on ... . Q B. Q + CE C. C E D. none

Description : All of the following are true about neurogenic shock except: A. There is a decrease in systemic vascular resistance and an increase in venous capacitance. B. Tachycardia or bradycardia may be ... Severe head injury, spinal cord injury, and high spinal anesthesia may all cause neurogenic shock.

Last Answer : Answer: C DISCUSSION: Neurogenic shock occurs when severe head injury, spinal cord injury, or pharmacologic sympathetic blockade leads to sympathetic denervation and loss of vasomotor tone. ... of treatment. The use of alpha-adrenergic agonist is infrequently necessary to treat neurogenic shock

Description : Nitroglycerin, either directly or through reflexes, results in which one of the following effects (a) Decreased heart rate (b) Decreased venous capacitance (c) Increased afterload (d) Increased cardiac force (e) Increased diastolic intramyocardial fiber tension

Last Answer : Ans: D

Description : 'Farad' is the unit of : (1) Capacitance (2) Inductance (3) Resistance (4) Conductance

Last Answer : (1) Capacitance Explanation: The Farad is the SI derived unit of capacitance. It is named after the English physicist Michael Faraday.

Description : If the length of a Hertz dipole is decreased A. its resonant frequency will be lowered its distributed inductance will be increased B. its distributed inductance will be decreased C. its ... frequency will be increased D. its distributed capacitance between the antenna and ground will be increased.

Last Answer : C. its resonant frequency will be increased

Description : If an antenna is too short for the wavelength being used, the effective length can be increased by adding: A. capacitance in series B. inductance in series C. resistance in parallel D. resistance in series

Last Answer : B. inductance in series

Description : Top loading is used in an antenna in order to increase its ______. A. practical height B. beamwidth C. effective height D. input capacitance

Last Answer : C. effective height