Description : How do I discharge a capacitor?
asked
Mar 15, 2018
by
anonymous
Description : How do you charge a capacitor with a battery?
Answer :
The capacitor is connected in parallel with the battery.
asked
Mar 15, 2018
by
anonymous
Description : How do you know when a capacitor is bad?
asked
Mar 15, 2018
by
anonymous
Description : How do you test a capacitor with a multimeter?
asked
Mar 15, 2018
by
anonymous
Description : How hot does it get in a microwave?
asked
Mar 11, 2018
by
anonymous
Description : Choose the correct order of electric discharge lamps in their increasing order of efficiencies (lumens/watt) : (A) Sodium vapour lamp, Mercury vapour lamp, Neon lamp (B) Neon lamp, Sodium vapour lamp, Mercury vapour lamp (C) Neon lamp, Mercury vapour lamp, Sodium vapour lamp (D) Mercury vapour lamp, Sodium vapour lamp, Neon lamp
Answer :
Choose the correct order of electric discharge lamps in their increasing order of efficiencies (lumens/watt) : (A) Sodium vapour lamp, Mercury vapour lamp, Neon lamp (B) Neon lamp, Sodium ... Mercury vapour lamp, Sodium vapour lamp (D) Mercury vapour lamp, Sodium vapour lamp, Neon lamp
asked
Apr 30, 2018
by
anonymous
Description : Which of the following is a negative-resistance microwave device for oscillator applications? A) IMPATT Diode B) Gunn Diode C) Snap diode D) Schottky Diode
Answer :
Which of the following is a negative-resistance microwave device for oscillator applications? A) IMPATT Diode B) Gunn Diode C) Snap diode D) Schottky Diode
asked
Jun 18, 2018
by
anonymous
Description : Which of the following device is used for coupling microwave energy? A) Resonator B) Waveguide C) Loop D) Antenna
Answer :
Which of the following device is used for coupling microwave energy? A) Resonator B) Waveguide C) Loop D) Antenna
asked
Jun 18, 2018
by
anonymous
Description : electrical specifications of microwave oven.
Answer :
Supply voltage: 220 volts,50 Hz. Single phase A.C. Power consumption: 1300 W approx.(power consumption vary as manufacturer from500W to 1500W) Microwave power: 700 w-850 W Microwave frequency: 2450 ... ) Timer: 60 min. - 90 min(timer can also varied) Control: Soft/one touch control
asked
Sep 2, 2019
by
anonymous
Description : What is the role of a capacitor in a circuit?
asked
Mar 15, 2018
by
anonymous
Description : What are the characteristics of a capacitor?
asked
Mar 15, 2018
by
anonymous
Description : What is the basic function of a capacitor?
asked
Mar 15, 2018
by
anonymous
Description : What is the direction of flow when charging a capacitor?
asked
Mar 15, 2018
by
anonymous
Description : What is the symbol of a capacitor?
Answer :
symbol of a capacitor
asked
Mar 15, 2018
by
anonymous
Description : Which side of a capacitor is negative?
Answer :
In electrolytic type negative is shorter lead and usually mark in the tank. But of course not applicable to non-polar.
asked
Mar 15, 2018
by
anonymous
Description : How does a capacitor improve power factor?
Answer :
Every circuit are usually more inductive than capacitive.it means that the current lags by voltage at small angle.hence we have to compensate this situation so we use Capacitor then this lag is compensate ... angle becomes low and the value of cos(phase angle) is increase and hence power also max.
asked
Dec 16, 2017
by
anonymous
Description : Which capacitor is used for high frequency?
asked
Mar 15, 2018
by
anonymous
Description : Why shunt capacitor is used?
Answer :
To improve voltage at receiving end and power factor
asked
Mar 15, 2018
by
anonymous
Description : Why capacitor bank is used?
Answer :
In industrial or factory used E.B Power supply must be maintained above 0.90 power factor is compulsory for avoid EB Penalty. So APFC ( automatic Power factor control ) panel is used to maintained balance the load and PF maintained.
asked
Mar 15, 2018
by
anonymous
Description : What is the basic use of capacitor?
asked
Mar 15, 2018
by
anonymous
Description : Why is a capacitor used in a single phase motor and not in three phase motor ?
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.
asked
Sep 2, 2019
by
anonymous
Description : Why is a capacitor used in a ceiling fan ?
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
asked
Aug 18, 2019
by
anonymous
Description : Dielectric loss in a capacitor is best measured by (A) Wien Bridge (B) Schering Bridge (C) Anderson Bridge (D) Heaviside-Campbell Equal Ratio Bridge
Answer :
Dielectric loss in a capacitor is best measured by Schering Bridge
asked
Apr 25, 2018
by
anonymous
Answer :
If the current in a capacitor leads the voltage by 80°, the loss angle of the capacitor is 10°.
asked
Mar 21, 2018
by
anonymous
Answer :
In a ceiling fan employing capacitor run motor secondary winding surrounds the primary winding.
asked
Mar 20, 2018
by
anonymous
Answer :
In a two value capacitor motor, the capacitor used for running purposes is paper spaced oil filled type.
asked
Mar 20, 2018
by
anonymous
Answer :
In a capacitor start single-phase motor, when capacitor is replaced by a resistance motor will continue to run in same direction.
asked
Mar 20, 2018
by
anonymous
Answer :
In a capacitor start motor, the phase displacement between starting and running winding can be nearly 90°.
asked
Mar 20, 2018
by
anonymous
Answer :
In a capacitor start and run motors the function of the running capacitor in series with the auxiliary winding is to improve power factor.
asked
Mar 20, 2018
by
anonymous
Description : What is the purpose of a capacitor in an AC circuit?
Answer :
Every AC supply is not ideal AC it contains DC component so to provide restriction to DC component in supply we have to use Capacitor
asked
Dec 16, 2017
by
anonymous
Description : Energy stored in capacitor examples
Answer :
Energy stored in capacitor examples
asked
May 22, 2019
by
anonymous
Description : Power factor of an inductive circuit is usually improved by connecting capacitor to it in?
Answer :
Power factor of an inductive circuit is usually improved by connecting capacitor to it in parallel.
asked
Mar 25, 2018
by
anonymous
Answer :
The capacitors used in single-phase capacitor motors have no polarity marking.
asked
Mar 20, 2018
by
anonymous
Answer :
Two-value capacitor motor finds increased application as compressor motor in small home air-conditioners because it has low starting as well as running currents at relatively high power factor.
asked
Mar 20, 2018
by
anonymous
Answer :
In capacitor start single-phase motors current in the starting winding leads the voltage.
asked
Mar 20, 2018
by
anonymous
Description : Which energy is stored in capacitor?
asked
Mar 10, 2018
by
anonymous
Description : Does current flow through a capacitor ?
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...
asked
Aug 25, 2019
by
anonymous
Description : 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.
asked
Aug 13, 2019
by
anonymous
Description : Explain the working of a single phase capacitor start induction motor.
Answer :
Single phase capacitor start induction motor https://youtu.be/31lvvzU5Puc
asked
Jul 30, 2019
by
anonymous
Description : For a DC circuit capacitor is
Answer :
For a DC circuit capacitor is virtually an open circuit
asked
May 8, 2018
by
anonymous
Description : 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
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
asked
Apr 29, 2018
by
anonymous
Description : 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
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
asked
Apr 29, 2018
by
anonymous
Description : 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
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
asked
Apr 29, 2018
by
anonymous
Description : 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
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
asked
Apr 29, 2018
by
anonymous
Description : A capacitor is generally a?
Answer :
A capacitor is generally a linear and bilateral component.
asked
Mar 25, 2018
by
anonymous
Description : The best place to install a capacitor is?
Answer :
The best place to install a capacitor is across the terminals of the inductive load.
asked
Mar 25, 2018
by
anonymous
Description : 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.
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.
asked
Mar 24, 2018
by
anonymous
Description : 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 ?
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.
asked
Mar 21, 2018
by
anonymous
Answer :
To reverse the direction of rotation of a capacitor start motor while it is running we should disconnect motor from the supply till it stops then reconnect it to supply with reversed connection of main or auxiliary winding.
asked
Mar 20, 2018
by
anonymous
Answer :
If the centrifugal switch of a two-value capacitor motor using two capacitors fails to open then Electrolytic capacitor will, in all probability, suffer break down.
asked
Mar 20, 2018
by
anonymous