A direct current can be measured by?

by

1 Answer

Answer :

A direct current can be measured by a D.C. potentiometer in conjunction with a standard resistance.

by

Related questions

Direct Current (DC)

Description : Direct Current (DC) Next Topic : Alternating current (AC)

Last Answer : Direct Current (DC) is the unidirectional electric current. Uni meaning is one. And the flow of charge in same direction. We know that conventional current flow from positive terminal of battery to ... The magnitude of DC may constant or vary but direction do not change with respect to time.

Describe the difference between direct and alternating current.

Description : Describe the difference between direct and alternating current.

Last Answer : Direct current is the flow of electricity or charge in one direction..  Alternative current is the flow of charge that doesn't flow in one direction. 

When the firing angle a of a single-phase, fully controlled rectifier feeding constant direct current into a

Description : When the firing angle a of a single-phase, fully controlled rectifier feeding constant direct current into a load is 30°, the displacement power factor of the rectifier is

Last Answer : When the firing angle a of a single-phase, fully controlled rectifier feeding constant direct current into a load is 30°, the displacement power factor of the rectifier is √3/2

In the case of direct current?

Description : In the case of direct current?

Last Answer : In the case of direct current magnitude and direction of current remains constant.

Inductance affects the direct current flow?

Description : Inductance affects the direct current flow?

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

True value has been 50 whereas measured value is 40 then the percentage error in the reading

Description : True value has been 50 whereas measured value is 40 then the percentage error in the reading will be ______.  (A) 20% (B) 40% (C) 50% (D) 30%

Last Answer : True value has been 50 whereas measured value is 40 then the percentage error in the reading will be 20%. 

The self inductance of a coil can be measured using

Description : The self inductance of a coil can be measured using (A) Wien’s Bridge (B) Schering Bridge (C) Anderson’s Bridge (D) Wheatstone Bridge

Last Answer : The self inductance of a coil can be measured using Anderson’s Bridge

Dielectric loss in a capacitor is best measured by

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

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

E.m.f. of a Weston cell is accurately measured by?

Last Answer : E.m.f. of a Weston cell is accurately measured by electrostatic voltmeter.

Resistances can be measured with the help of?

Last Answer : Resistances can be measured with the help of ohmmeters and resistance bridges.

How is energy measured ?

Description : How is energy measured ?

Last Answer : How is energy measured What is energy? Energy is the ability to do work and results in a change. It is a very commonly used word in our everyday lives. Different Forms of Energy Energy exists as ... for one hour. Horsepower is another unit of measuring energy. 1 HP is equivalent to 745.7 watts.

The load of a consumer is generally measured in terms of :

Description : The load of a consumer is generally measured in terms of : (A) Volts (B) Amperes (C) Ampere hour (D) kW

Last Answer : The load of a consumer is generally measured in terms of : kW

In a battery, the difference between the no-load voltage and the measured voltage output is called ________

Description : In a battery, the difference between the no-load voltage and the measured voltage output is called ________ A) Internal voltage B) Internal resistance C) External resistance D) All the above

Last Answer : In a battery, the difference between the no-load voltage and the measured voltage output is called Internal resistance

The power consumed by a balanced 3-ph load is measured by two-wattmeter method. The meter readings are

Description : The power consumed by a balanced 3-ph load is measured by two-wattmeter method. The meter readings are 8 kW and 4 kW. The power factor of the load is (A) zero (B) 0.5 (C) between zero and 0.5 (D) between 0.5 and unity

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Liquid flow rate is measured using

Description : Liquid flow rate is measured using (A) a pirani gauge (B) a pyrometer (C) an orifice plate (D) a bourdon tube

Last Answer : Liquid flow rate is measured using an orifice plate

Iron loss of a transformer can be measured by?

Last Answer : Iron loss of a transformer can be measured by low power factor wattmeter.

Alternating current is measured by?

Last Answer : Alternating current is measured by induction ammeter.

Differentiate between direct and indirect extrusion. Discuss their relative merits and demerits.

Description : Differentiate between direct and indirect extrusion. Discuss their relative merits and demerits. 

Last Answer : Direct extrusion Indirect extrusion Simple, but the material must slide along the chamber wall. In this case, material does not move but die moves. High friction forces must ... be used for extruding long extrudes. Support of the ram becomes a problem as work length increases.

Identify direct addressing instructions from following instructions : (i) MOV RO, R5 (ii) MOV RO, 80 H (iii) MOV RO, #75H (iv) ADD A, 45 H

Description : Identify direct addressing instructions from following instructions : (i) MOV RO, R5 (ii) MOV RO, 80 H (iii) MOV RO, #75H (iv) ADD A, 45 H

Last Answer : Instructions ii) and iv) are direct addressing as 80H and 45H are direct addresses

Direct Extrusion process

Description : Direct Extrusion process

Last Answer : Direct Extrusion process Direct extrusion process is shown in fig. The raw material used is a billet. It consists of a press operated ram and a cylinder or container into which the heated ... for extruding long extrudes. 2) Support of the ram becomes a problem as work length increases.

advantages and disadvantages of direct coupled amplifier over RC coupled amplifier.

Description : advantages and disadvantages of direct coupled amplifier over RC coupled amplifier. 

Last Answer : Advantages:  Due to absence of coupling capacitors, the gain does not reduce on the lower frequency side.  This amplifier can amplify dc signals. Reduced cost and complexity due to absence of ...   The output waveform has a dc shift.  Poor frequency response at a higher frequency.

Explain with schematic diagram direct distribution of solar energy.

Description : Explain with schematic diagram direct distribution of solar energy.

Last Answer : Explain with schematic diagram direct distribution of solar energy: Solar energy reaching earth's surface consists of two components: i) Direct solar energy, ii) Diffused solar energy. Direct solar energy ... radiation. It is very intense radiation and it can produce sun burns and shadows.

With neat diagram explain calibration of energy meter by direct loading method.

Description : With neat diagram explain calibration of energy meter by direct loading method.

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State the need of cascade amplifier and draw circuit diagram of 2-stage direct coupled amplifier.

Description : State the need of cascade amplifier and draw circuit diagram of 2-stage direct coupled amplifier.

Last Answer : Need:- The voltage (or power) gain, obtained from a single stage small signal amplifier, is limited. Therefore, it is not sufficient for all practical applications. Therefore, in order to obtain greater voltage and power gain, cascade amplifiers are used.

Compare RC coupled, transformer coupled and direct coupled amplifier based on four points.

Description : Compare RC coupled, transformer coupled and direct coupled amplifier based on four points.

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A direct online starter is used for starting motors?

Last Answer : A direct online starter is used for starting motors up to 5 H.P.

Diversity factor has direct effect on the?

Description : Diversity factor has direct effect on the?

Last Answer : Diversity factor has direct effect on the fixed cost of unit generated.

For the protection of power station buildings against direct strokes the requirements are?

Last Answer : For the protection of power station buildings against direct strokes the requirements are interception, conduction and dissipation.

In a single-phase transformer, the magnetizing current is

Description : In a single-phase transformer, the magnetizing current is (A) in phase with the no-load current (B) in quadrature with the no-load current (C) the product of no-load current and power factor (D) in phase with the flux in the core

Last Answer : In a single-phase transformer, the magnetizing current is in phase with the flux in the core

Eddy current damping cannot be used for moving iron instrument because

Description : Eddy current damping cannot be used for moving iron instrument because

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The gravity controlled instrument has crowded scale because current is proportional to?

Last Answer : The gravity controlled instrument has crowded scale because current is proportional to sine of deflection angle.

For measuring current at high frequency we should use?

Last Answer : For measuring current at high frequency we should use thermocouple instrument.

The disc of an instrument using eddy current damping should be of?

Last Answer : The disc of an instrument using eddy current damping should be of conducting and non-magnetic material.

The chemical effect of current is used in?

Last Answer : The chemical effect of current is used in D.C. ammeter hour meter.

An induction meter can handle current up to?

Last Answer : An induction meter can handle current up to 100 A.

What type of meter is used to measure current?

Description : What type of meter is used to measure current?

Last Answer : Ammeter

Analyze the effect of supply voltage on performance of LED as regards current, Lumen output, efficacy and life.

Description : Analyze the effect of supply voltage on performance of LED as regards current, Lumen output, efficacy and life. 

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With the help of N-channel JFET describe the effect of input voltage VGS on output current ID.

Description : With the help of N-channel JFET describe the effect of input voltage VGS on output current ID.

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Define: i) Input Offset Voltage ii) Input offset Current iii) Input Bias Current iv) Output offset voltage

Description : Define: i) Input Offset Voltage ii) Input offset Current iii) Input Bias Current iv) Output offset voltage

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Current division rule example

Description : Current division rule example

Last Answer : Current division rule example

A linear network has a current input 4cos(ω t + 20º)A and a voltage output 10 cos(ωt +110º) V. Determine the associated impedance.

Description : A linear network has a current input 4cos(ω t + 20º)A and a voltage output 10 cos(ωt +110º) V. Determine the associated impedance.

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Find current through resistor using nodal analysis

Description : Find current through resistor using nodal analysis

Last Answer : Find current through resistor using nodal analysis

Nodal analysis problem two current source

Description : Nodal analysis problem two current source

Last Answer : Nodal analysis problem two current source

Alternating current (AC)

Description : Alternating current (AC)

Last Answer : AC stands for Alternating Current meaning voltage or current that changes polarity or direction respectively over time. An Alternating Current (AC) is an electric current whose magnitude ... energy are known as alternators and are simpler construction than DC electromechanical generators.

Does current flow through a capacitor ?

Description : 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...

What kills, current or voltage?

Description : What kills, current or voltage?

Last Answer : Current would kill. You can actually have thousands of bolts going through you and not even know it. Yes you probably know already voltage is current times resistance. Since your body is a resistor it would take just a small amount of current to create a very high voltage

Electric Current

Description : Electric Current

Last Answer : Electric current is the flow of charges. The electrons flow from higher density area of electrons to lowers density area of electrons. The terminal of battery which we called positive terminal of ... circuit is called electric current. The unit of electric current is Coulomb per Second or Ampere.

Define current. State its unit.

Description : Define current. State its unit.

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Give two applications of each : 1) Eddy current sensor 2) Optical sensor.

Description : Give two applications of each : 1) Eddy current sensor 2) Optical sensor.

Last Answer : Eddy current sensor : 1. Detection of non-magnetic but conductive materials. 2. Displacement sensing 3. Position sensing Optical sensor : 1. Position Detection 2. Velocity Detection 3. Acceleration Detection 4. Direction Detection