# What is Capacitive coupling ?

What is Capacitive coupling ?

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.

## Related Questions

Description : Give the different types of amplifier coupling.

Last Answer : 1. Resistance – capacitance (RC) coupling.  2. Inductance (LC) coupling.  3. Transformer coupling (TC)  4. Direct coupling (D.C.)

Description : Which of the following device is used for coupling microwave energy?  A) Resonator B) Waveguide C) Loop D) Antenna

Last Answer : The coupling angle or load angle of synchronous motor is defined as the angle between the rotor and the stator poles of opposite polarity.

Description : Transformer coupling introduces which type of distortion?

Last Answer : Transformer coupling introduces Cross over distortion.

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

Description : Capacitive reactance

Last Answer : Capacitive reactance formula

Description : Capacitive current

Last Answer : Capacitive current formula

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

Last Answer : To maintain voltage stability

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 : Capacitive susceptance is a measure of?

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

Description : Time constant of a capacitive circuit?

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

Description : In a highly capacitive circuit the?

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

Description : Capacitive reactance is more when?

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

Description : For interrupting capacitive currents which Circuit Breaker (CB) is used a) SF6 CB b) Oil CB c) Vacuum CB d) Air blast CB

Last Answer : Ans: Vacuum CB

Description : In series RLC circuit at resonant a) Voltage is in phase with current b) Current is maximum c) Inductive reactance = Capacitive reactance d) All of the above

Last Answer : Ans: All of the above

Description : Series capacitors are used to (a) compensate for line inductive reactance (b) compensate for line capacitive reactance (c) improve line voltage (d) none of the above

Last Answer : (a) compensate for line inductive reactance

Description : What happens to capacitive reactance as frequency increases?

Description : What is the capacitive reactance across a point-contact diode as compared to a normal junction diode?

Description : Capacitive tuning by inserting a ring into the cavity slot of a magnetron is accomplished by what type of tuning mechanism?

Description : Bridge used to measure both inductive and capacitive impedances at higher frequencies

Description : TRUE OR FALSE

Description : Describe working of capacitive discharge ignition (CDI) system

Last Answer : Working of CDI system: It mainly consists of 6-12 V battery, ignition switch, DC to DC convertor, charging resistance, tank capacitor, Silicon Controlled Rectifier (SCR), SCR-triggering device; step ... of AC to DC charging device, signal conditioning and amplifying unit and control circuit.

Description : Draw and explain the working of inductive and capacitive sensors.

Last Answer : Ans: Inductive Sensor: Diagram: Operation: An inductive sensor consist of a coil wound around a ferrous metallic core ,detector circuit and solid state output . With supply voltage ,oscillator operates to ... output device being ON or OFF. Capacitive Sensor: Diagram: Working

Description : State the working principle of capacitive sensor with neat diagram.

Last Answer : Explanation:-- Capacitance is an electrical property which is created by applying an electrical charge to two conductive objects with a gap between them. A simple demonstration is two ... materials. The other type measures thicknesses of nonconductive materials or the level of a fluid.

Description : Explain with sketch torque measurement using (i) Stroboscope method, (ii) Capacitive method.

Last Answer : (i) Stroboscope method:-- Explanation : The arrangement of two flanges A and B placed at a distance on the shaft is as shown. Flange A carries a scale while flange a ... By applying a radiometric algorithm to the received signals, the signed relative angle between the rotors is calculated.

Description : Give one application each of following transducer: (i) LVDT (ii) RVDT (iii) Capacitive (iv) Piezoelectric

Last Answer : i) LVDT ➢ LVDT used to measure force ➢ LVDT used to measure strain ➢ LVDT used to measure weight ➢ LVDT used to measure tension ➢ LVDT used to measure pressure ➢ The ... flow meters, non-destructive test (NDT) equipment's ➢ Piezoelectric materials are used in ultrasonic transducers.

Description : Explain calibration of capacitive type level measurement.

Last Answer : ➢ Calibration of capacitance type level transmitter 1. Remove the level transmitter from the system(tank). 2. check whether transmitter shows zero reading by connecting with multimeter otherwise release the ... rotate the span screw to 20ma. 3. Repeat these steps and check all readings

Description : A series combination of resistance 100 ohm and capacitance 50µf is connected in series to a 230 V, 50HZ supply. Calculate (i) Capacitive reactance (ii) Current (iii) Power factor (iv) Power consumed

Last Answer : For RC series circuit

Description : State working principle of capacitive type level sensor with diagram.

Last Answer : Principle of working : The capacitive level detector operates on the equation of parallel plate capacitor, i.e. Where, C = capacitance value in farad ε = dielectric constant d = distance between ... (ε ). This principle is used in the capacitance level gauge for detecting level change.

Description : Explain concept of capacitive type proximity switch with neat schematic diagram.

Last Answer : Capacitive type proximity switch: A capacitive proximity switch is device that senses presence of metallic or nonmetallic objects. The internal circuit consists of an oscillator, threshold detection stage and ... in oscillation amplitude is detected and output switching device is turned on.

Last Answer : Circuits with capacitive reactance X C alone. Capacitive reactance X C values in series. There is no resistance or inductive reactance only capacitive reactance is there. Let two capacitive ... horizontal in phasor diagram. The total current I T leads voltage V A by 90 degree.

Description : Describe capacitive type proximity switch with neat diagram.

Last Answer : A capacitive proximity switch is device that senses presence of metallic or non-metallic objects. The internal circuit consists of an oscillator, threshold detection stage and an open capacitor formed ... oscillate and change in the oscillation amplitude is detected by threshold detection.

Description : What happens to current flow in a capacitive circuit when the DC voltage across the capacitor is approximately equal to the source voltage?

Last Answer : Capacitor always charges up to the voltage of source. When the capacitor is charged to same as source voltage then there is no current flowing through the capacitor. The current through the capacitor is called displacement current.

Description : In order to get maximum power transfer from a capacitive source, the load must? A.have a capacitive reactance equal to circuit resistance B.have an impedance that is the complex conjugate of the source impedance C.be as capacitive as it is inductive D.none of the above

Last Answer : In order to get maximum power transfer from a capacitive source, the load must? A.have a capacitive reactance equal to circuit resistance B.have an impedance that is the complex conjugate of the source impedance C.be as capacitive as it is inductive D.none of the above

Description : In order to reduce the voltage surges due to current chopping and capacitive current breaking, we connect (A) A resistor across the CB contacts. (B) A capacitor across the CB contacts. (C) An inductor across the CB contacts. (D) A switch across the CB contacts

Last Answer : In order to reduce the voltage surges due to current chopping and capacitive current breaking, we connect A resistor across the CB contacts.

Description : The principle of operation used in capacitive transducers to measure level of liquid is change of (a) Area of plates (b) Dielectric strength (c) Distance between plates (d) Shape of plates

Last Answer : The principle of operation used in capacitive transducers to measure level of liquid is change of Dielectric strength

Description :  Capacitive transducers are normally used for : -  a) static measurements b) dynamic measurements c) both static and dynamic measurements d) transient measurements

Last Answer : Capacitive transducers are normally used for : - dynamic measurements

Description : The dynamic characteristics of capacitive transducer are similar to those of   (a) Low-pass filter (b) High-pass filter (c) Notch filter (d) Band-stop filter

Description : The upper cut off frequency of a capacitive coupled RC amplifier is decided by  A) Input Coupling capacitance B) Transistor internal capacitances C) Output coupling capacitance D) Bypass capacitance

Description : Capacitive transducers for displacement are characterised by  A) Mechanical coupling B) Loading C) Noninvasive D) Nonideal displacement

Description : What Is The Empirical Formula Used To Give The Number Of Bolts In Flange Coupling?

Last Answer : n = 0.2d + 3

Description : Write About Muff Coupling?

Last Answer : It is a hollow piece which is used with key to connect the shafts. It may be found in cylindrical muff,half lap muff or split muff type. A gib head key or a saddle key is inserted between the coupling and shafts through out for connecting the shafts.

Description : What Is A Flexible Coupling?

Last Answer : It connects the shafts with soft materials such as rubber, leather, canvas etc. It adjusts the little misalignment and controls the vibrations also. It is generally used electric pumps.

Description : Explain About Universal Coupling?

Last Answer : It is used to connect two shafts whose axis are not in line with each one center block, two pins and two pins and two collars with lock pins. The forks are fitted with key on the ends of two shafts ... its two pins. It does not work well if the angle between the two shafts is more than 45 degree.

Description : What Is A Flange Coupling?

Last Answer : It is very common type of coupling used to connect the shafts by means of two flanges. Two cast iron flanges are fitted with key to the ends of the two shafts to be connected and fastened together by means of bolts and nuts.

Description : What Do You Mean A Coupling?

Last Answer : It is a device used to connect two shafts. These are generally used to increase the length of shafts.

Description : Which of the following methods cannot be used to increase the bandwidth for cascaded RF amplifier stages? A) Wave traps in each stage B) Stagger tuning C) A shunt damping resistor across each tuned circuit D) Doubled tuned transformers with tighter coupling

Last Answer : A) Wave traps in each stage

Description : In a resistance loaded, RC coupled amplifier the dc component is blocked by A) Load resistance RL B) Coupling capacitor, CC C) RB D) The transistor.

Last Answer : B) Coupling capacitor, CC

Description : The Bandwidth of an RC-coupled amplifier is limited by: A) coupling capacitors at the low frequency end and bypass capacitors at the high frequency end B) coupling capacitors at the high frequency ... at the low frequency end and bypass as well as coupling capacitors at the high frequency end.

Last Answer : C) bypass and coupling capacitors at the low frequency end and shunt capacitors at the high frequency end and

Description : um of the elements of row i equal to shunt admittances connected to bus i. If this summation is zero, indicates there is no a) shunt admittance b) mutual coupling c) both 1 and 2 d) none of the above

Last Answer : c) both 1 and 2