Recent questions tagged capacitor

asked May 2, 2020 by anonymous

State the applications and specification of (i) Resistor (ii) Capacitor (iii)Inductor

Last answer: Application of resistor: 1.Resistors are used in high frequency instrument. 2.Resistor is used in power control circuit. 3.It is used in DC power supplies. 4.Resistors are used ... DC Current 3.Electromagnetic Interference (EMI) 4.Magnetic Saturation Flux Density 5.Curie Temperature

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40 views 1 answer

asked Apr 20, 2020 by anonymous

Charging Action of capacitor

Last answer: Charging Action of capacitor .embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; } .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }

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77 views 2 answers

asked Apr 20, 2020 by anonymous

Capacitor : Before charging takes place

Last answer: .embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; } .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }

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56 views 2 answers

asked Sep 2, 2019 by anonymous

Why is a capacitor used in a single phase motor and not in three phase motor ?

Last answer: In 1-phase induction motor capacitor work is generate the auxiliary winding current than excite the main winding to rotor starts rotate. After rotor start rotating about 75% of their speed than auxiliary ... emf to start the motor.so,in 3-phase induction motor is self start induction motor.

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129 views 6 answers

asked Aug 25, 2019 by anonymous

Does current flow through a capacitor ?

Last answer: Imagine a pipe with a flexible diaphram in the middle separating two haves of the pipe. Now the pipe is filled with air. If you apply a pressure to one end the diaphram will deform ... capacitor, the effects on electrons will be recreated across the boundary. But theres no electrical connection...

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82 views 1 answer

asked Aug 18, 2019 by anonymous

Why is a capacitor used in a ceiling fan ?

Last answer: For splitting phase so that a rotating magnetic field will be produced & as per Lenz's law a torque will be created & rotor starts rotating. In single phase if capacitor is not used for split phase then a pulsating mag. field is produced which is unable to produce torque on rotor

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205 views 3 answers

asked Aug 13, 2019 by anonymous

A 3 micro Faraday capacitor is connected closing a switch to a supply of 100V through 1 milli ohm series resistance. Calculate

A 3 micro Faraday capacitor is connected closing a switch to a supply of 100 V through 1 milli ohm series resistance. Calculate 1 the time constant 2 initial charging current 3 the initial rate of rise of p.d across the caps 4 Voltage across the capacitor 6 second,after the switch has been closed 5 the time taken for the capacitor to be fully charged.

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75 views 0 answers

asked Jul 30, 2019 by anonymous

Explain the working of a single phase capacitor start induction motor.

Last answer: Single phase capacitor start induction motor https://youtu.be/31lvvzU5Puc

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153 views 2 answers

asked May 22, 2019 by anonymous

Energy stored in capacitor examples

Last answer: Energy stored in capacitor examples

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asked May 21, 2019 by anonymous

Series and parallel capacitor problem

Last answer: Series and parallel capacitor problem 1 : https://youtu.be/MSl5mRwtjAE Series and parallel capacitor problem 2 : https://youtu.be/yGwbpyEtIyw Series and parallel capacitor problem 3 : https:// ... https://youtu.be/_7KwEwWqiNU Series and parallel capacitor problem 10 : https://youtu.be/et8MCWV_OyE

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89 views 1 answer

asked May 21, 2019 by anonymous

Problem on capacitor

Last answer: Problem on capacitor 1 : https://youtu.be/ZyT3WOFN8fs Problem on capacitor 2 : https://youtu.be/JBwEfekvutE Problem on capacitor 3 : https://youtu.be/E1lhIn5t8Mo Problem on capacitor 4 : https://youtu.be/yl651f4IUfg

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108 views 1 answer

asked May 8, 2018 by anonymous

For a DC circuit capacitor is

Last answer: For a DC circuit capacitor is virtually an open circuit

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70 views 1 answer

asked Apr 29, 2018 by anonymous

What is a capacitor voltage transformer?

What is a capacitor voltage transformer? A) It is a transformer used in power systems to step up low voltage signals and provide extra high voltage B) It is a transformer used in power systems to step up high voltage signals and provide extra high voltage C) It is a transformer used in power systems to step down extra high voltage signals and provide low voltage D) None of these

Last answer: What is a capacitor voltage transformer? A) It is a transformer used in power systems to step up low voltage signals and provide extra high voltage B) It is a transformer used in power systems ... power systems to step down extra high voltage signals and provide low voltage D) None of these

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77 views 1 answer

asked Apr 29, 2018 by anonymous

What happens to the capacitance if mica is inserted between the plates of an air capacitor?

What happens to the capacitance if mica is inserted between the plates of an air capacitor? A) The capacitance increases B) The capacitance decreases C) The capacitance remains the same D) The capacitance becomes zero

Last answer: What happens to the capacitance if mica is inserted between the plates of an air capacitor? A) The capacitance increases B) The capacitance decreases C) The capacitance remains the same D) The capacitance becomes zero

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62 views 1 answer

asked Apr 29, 2018 by anonymous

What is the charge on each capacitor when a 150 V is applied across two capacitors with values 5 μF and 10 μF,

What is the charge on each capacitor when a 150 V is applied across two capacitors with values 5 μF and 10 μF, connected in series? A) 500 μC B) 0.5 μC C) 0.5 C D) None of these

Last answer: What is the charge on each capacitor when a 150 V is applied across two capacitors with values 5 μF and 10 μF, connected in series? A) 500 μC B) 0.5 μC C) 0.5 C D) None of these

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64 views 1 answer

asked Apr 29, 2018 by anonymous

What is the stored energy when 200 V is applied across a 7 μF capacitor?

What is the stored energy when 200 V is applied across a 7 μF capacitor? A) 1400 Joules B) 0.7 Joules C) 0.14 Joules D) None of these

Last answer: What is the stored energy when 200 V is applied across a 7 μF capacitor? A) 1400 Joules B) 0.7 Joules C) 0.14 Joules D) None of these

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110 views 1 answer

asked Apr 29, 2018 by anonymous

Which of the following can be used to measure the capacitance of a capacitor?

Which of the following can be used to measure the capacitance of a capacitor? A) Rheostat B) Schering bridge C) Wheatstone bridge D) None of these

Last answer: Which of the following can be used to measure the capacitance of a capacitor? A) Rheostat B) Schering bridge C) Wheatstone bridge D) None of these

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2.7k views 1 answer

asked Apr 25, 2018 by anonymous

Dielectric loss in a capacitor is best measured by

Dielectric loss in a capacitor is best measured by (A) Wien Bridge (B) Schering Bridge (C) Anderson Bridge (D) Heaviside-Campbell Equal Ratio Bridge

Last answer: Dielectric loss in a capacitor is best measured by Schering Bridge

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93 views 1 answer

asked Mar 25, 2018 by anonymous

A capacitor is generally a?

Last answer: A capacitor is generally a linear and bilateral component.

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51 views 1 answer

asked Mar 25, 2018 by anonymous

Power factor of an inductive circuit is usually improved by connecting capacitor to it in?

Last answer: Power factor of an inductive circuit is usually improved by connecting capacitor to it in parallel.

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160 views 1 answer

asked Mar 25, 2018 by anonymous

The best place to install a capacitor is?

Last answer: The best place to install a capacitor is across the terminals of the inductive load.

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84 views 1 answer

asked Mar 24, 2018 by anonymous

The reactance offered by a capacitor to alternating current of frequency 50 Hz is 20 Q....

The reactance offered by a capacitor to alternating current of frequency 50 Hz is 20 Q. If frequency is increased to 100 Hz, reactance becomes_____ohms.

Last answer: The reactance offered by a capacitor to alternating current of frequency 50 Hz is 20 Q. If frequency is increased to 100 Hz, reactance becomes 10 ohms.

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148 views 1 answer

asked Mar 21, 2018 by anonymous

Commonly used standard capacitor is?

Last answer: Commonly used standard capacitor is concentric cylindrical type.

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64 views 1 answer

asked Mar 21, 2018 by anonymous

If the current in a capacitor leads the voltage by 80°, the loss angle of the capacitor is?

Last answer: If the current in a capacitor leads the voltage by 80°, the loss angle of the capacitor is 10°.

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112 views 1 answer

asked Mar 21, 2018 by anonymous

When a capacitor was connected to the terminal of ohmmeter, the pointer indicated a low resistance initially...

When a capacitor was connected to the terminal of ohmmeter, the pointer indicated a low resistance initially and then slowly came to infinity position. This shows that capacitor is ?

Last answer: When a capacitor was connected to the terminal of ohmmeter, the pointer indicated a low resistance initially and then slowly came to infinity position. This shows that capacitor is all right.

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93 views 1 answer