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Why does charge flow from positive to negative?

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Description : Write advantages and disadvantages of positive and negative feedback.

Answer : Advantages of Positive Feedback: i) Voltage gain increases. ii) No phase shift is provided. iii) Feedback signal and input signal are in phase. iv) Input and Output voltage increases.  ... ii) Feedback signal and input signal are out of phase. iii) Input and Output voltage decreases.

Description : Differentiate between positive and negative feedback.

Answer : PARAMETER POSITIVE FEEDBACK NEGATIVE FEEDBACK Overall phase shift 0° or 360° 180° Feedback and input signal Are in phase Are out of phase Input signal ... Increases Input impedance Decreases Increases Output impedance Increases Decreases

Description : Define negative and positive feedback

Answer : 1. Negative feedback: Feedback in which feedback signal is out of phase with input signal and it decreases output is called negative feedback.  2. Positive feedback: Feedback in which feedback signal is in phase with input signal and it increases output is called positive feedback. 

Description : Is an anode positive or negative?

Answer : The anode is positively charged electrode.

Description :  advantages of negative feedback over positive feedback.

Answer : Advantages of negative feedback over positive feedback: 1. Higher fidelity i.e. more linear operation. 2. Highly stabilized gain. 3. Increased bandwidth i.e. improved frequency response. 4. Less ... . 8. Input and output impedance can be modified as desired. 9. Less frequency distortion.

Description : Why does the magnetic field flow from north to south?

Description : Compare positive and negative feedback.

Answer : Sr. No. Parameter Positive feedback  Negative feedback 1 BW Increases Decreases 2 Feedback signal In phase with the input signal. 180 º out of phase ... impedance increases decreases 9 Uses Oscillators, Schmitt trigger Amplifiers, bootstrapping

Description : Can the electric field between two positive charges be zero?

Answer : It  can  only  if  they  have  equal  charges.

Description : Negative feedback in a closed-loop control system DOES NOT (A) reduce the overall gain (B) reduce bandwidth (C) improve disturbance rejection (D) reduce sensitivity to parameter variation

Answer : Negative feedback in a closed-loop control system DOES NOT reduce bandwidth

Description : How does negative feedback reduces distortion in an amplifier?

Description : A charge of 0.1 C moves past a given point every 0.01 s. How much is the current?

Answer : The current is 10.0A.  1ampere = 1 Coulomb per 1 second.  0.1Coulombs ÷ 0.01seconds = 10.0amperes.

Description : What is the output voltage of a battery if 10 J of energy is expended in moving 1.25 C of charge?

Description : Briefly describe the electric field of a static charge.

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

Description : How the charge Carriers are created?

Answer : Charge Carriers are created if the electrons is removed from atom .

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...

Description : Why do you need a closed circuit for electricity to flow?

Answer : When  the  circuit  is  closed  , a potential  diffrence  is  realized  between  the  two  nodes  connected  .This  causes  flow of  electrons  and  convection  current.

Description : Do electrons flow from the anode to the cathode?

Answer : electrons flow from cathode to anode because the electron has a negative charge and repels from the negatively charged cathode whilst also attracting to the positively charged anode.

Description : What is the flow of electrons from one atom to another called?

Answer : Electric current

Description : Coulomb Siemens Farad Joule

Answer : Correct Answer: 1. Coulomb

Description : The state of charge of the battery is indicated by the electrolyte's :  (A) mass (B) colour (C) viscosity (D) specific gravity

Answer : The state of charge of the battery is indicated by the electrolyte's : specific gravity

Description : The minimum charge on an ion is?

Answer : The minimum charge on an ion is equal to the charge of an electron.

Description : How do you charge a capacitor with a battery?

Answer : The  capacitor  is  connected   in  parallel  with   the  battery.

Description : What is the charge and mass of an electron?

Answer : Charge on electrons is 1.6022*10-19CAnd the mass of electrons is 9.109*10-31 kg

Description : An amplifier has a voltage gain of 120. To reduce distortion, 10% negative feedback is employed. The gain of the amplifier with feedback is  (1) 141 (2) 92.3 (3) 9.23 (4) 1.41

Answer : An amplifier has a voltage gain of 120. To reduce distortion, 10% negative feedback is employed. The gain of the amplifier with feedback is 9.23

Description : A unity negative feedback control system is found to have a gain margin of 20 dB. The Nyquist plot of the system (A) crosses the real axis at +0.1 (B) crosses the real axis at -0.1. (C) crosses the imaginary axis at -0.1 (D) crosses the imaginary axis at +0.1

Answer : A unity negative feedback control system is found to have a gain margin of 20 dB. The Nyquist plot of the system crosses the real axis at -0.1.

Description : The effect of negative feedback on distortion and bandwidth is A) Both distortion and bandwidth get decreased B) Both distortion and bandwidth get increased C) Distortion is reduced and bandwidth is increased D) Distortion is increased and bandwidth is decreased 

Answer : The effect of negative feedback on distortion and bandwidth is Distortion is reduced and bandwidth is increased

Description : A negative sequence relay is used for protection of  (1) Generator (3) Motor (2) Transformer (4) Long Transmission lines

Answer : A negative sequence relay is used for protection of Generator 

Description : A transformer has negative voltage regulation when its load power factor is   (1) Zero (2) Unity (3) Leading (4) Lagging

Answer : Leading

Description : Which diode exhibits negative resistance characteristic? (A) LED (B) Zener (C) Tunnel diode (D) PN diode

Answer : Which diode exhibits negative resistance characteristic? (A) LED (B) Zener (C) Tunnel diode (D) PN diode

Description : The transducer with negative temperature co-efficient of resistance is (A) Thermistor (B) Resistance Thermometer (C) Strain Gauge (D) Thermocouple

Answer : The transducer with negative temperature co-efficient of resistance is Thermistor

Description : Negative voltage regulation is indicative that the load is?

Answer : Negative voltage regulation is indicative that the load is capacitive.

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.

Description : Classify hydro-electric power plants according to water flow regulation and explain in brief.

Answer : Classification of hydro-electric power plants according to water flow regulation of water flow:-  1. Large reservoir power plant 2. Run-off river (ROR) power plant with poundage 3. Run-off River ... depends upon rate of flow of water Initial cost is less Its purpose is to generate electricity.

Description : The current flow in a battery is due to ______ A) movement of ions B) movement of protons C) movement of holes D) movement of neutrons

Answer : The current flow in a battery is due to movement of ions

Description : lf the wire which is vertical to this page has electron flow downwards the conductor will have

Answer : lf the wire which is vertical to this page has electron flow downwards the conductor will have a counter-clockwise field in the plane of the paper

Description : State advantages & disadvantages of electromagnetic flow meter.

Answer : Advantage: Provides wide linear range. 2) Ability to measure reverses flow. 3) Gives rapid response to flow changes. 4) No obstruction is created to flow. 5) It can handle corrosive as ... and pipe networks with relatively short inside diameters. 3) It is useful for electrically conducting fluid.

Description : Compare variable head flow meter with variable area flow meter.

Answer : Parameter Variable head flowmeter Variable area flowmeter Working principle Restriction or obstacle is placed in the path of flow to create a differential Pressure. The pressure ... viscous fluid slurries and dirty fluids. In laboratories and testing and production lines.

Description : Describe principle of operation of Doppler type ultrasonic flow meter with diagram. 

Answer : Diagram: Working:  The flow meter consists of a crystal transducer mounted outside the pipe in which flow is to be measured. This transducer is a piezoelectric crystal which ... , so the frequency of the reflected wave is shifted to particle velocity, according to Doppler principle.

Description : Define laminar flow and turbulent flow.

Answer : Laminar flow : When a fluid flowing through the pipe at different speeds (fast at center and slow at edges), and the fluid particles move in layers with one layer sliding over the adjacent ... successive cross sections, then this flow is called as turbulent flow. Reynolds no is greater than 4000 

Description : Load flow studies involve solving simultaneous  (1) linear algebraic equations. (3) linear differential equations. (2) non-linear algebraic equations. (4) non-linear differential equations.

Answer : Load flow studies involve solving simultaneous non-linear algebraic equations.

Description : Inductance affects the direct current flow?

Answer : Inductance affects the direct current flow at the time of turning on and off.

Description : Which way do electrons flow in an electrochemical cell?

Description : What are ways we can measure the flow of electrons?

Description : What is the direction of flow of current?

Answer : Current  flows  from  anode  to  cathode(opposite  direction  to  flow of  electrons)

Description : What is the direction of the flow of electrons?

Answer : Electrons  flow    cathode   to   anode  or  in   an  oposite  direction  of   convection  current  flow  or  holes.

Description : What is the direction of the conventional current flow?

Answer : The conventional current flow in opposite direction of flow of electrons. The electrons flow from negative terminal of battery to positive terminal of battery. And conventional current flow from positive terminal of battery to negative terminal of battery.

Description : What is the direction of flow of electric current in an electric circuit?

Answer : It  flows  from  anode  to  cathode  (direction  of   holes  flow)

Description : Draw venture meter and write steps to measure flow rate.

Answer : Venturi meter consists of three sections that is converging section, throat section and diverging section. The flow is introduced to the meter through the inlet with diameter D' . The inclined angle ... to 15o . Flow rate is proportional to the square root of the differential pressure.

Description : Is electron flow out from the positive or negative terminal of the voltage source? 

Answer : Electrons flow from negative terminal of battery which is the area of higher density electrons to positive terminal of battery which is the area of lower density of electrons. 

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