What happens when a current flows through a wire?

2 Answers

There  is  a  rotating  magnetic  field   around  the   conductor.
Like 0 like Dislike 0 dislike
Current can produce two effect one is heating effect and second is magnetic effect.
Like 0 like Dislike 0 dislike

Related questions

Description : When current flows through heater coil it glows but supply wiring does not glow because?

Answer : When current flows through heater coil it glows but supply wiring does not glow because resistance of heater coil is more than the supply wires.

Description : Leakage current flows through the thyristor in

Answer : Leakage current flows through the thyristor in Forward blocking mode and Reverse blocking mode.

Description : why current flows in opposite direction of electrons?

Answer : Hi team, the current flow is nothing but flow of electrons But the conventional direction I'd opposite to actual current flow . ..

Description : Find the current through 4 ohm resistor by source transformation

Description : Find current through resistor using nodal analysis

Answer : Find current through resistor using nodal analysis

Description : For a round wire, the approximate value of fusing current is given by

Answer : For a round wire, the approximate value of fusing current is given by  K√d3

Description : What happens when a neutral wire touches a phase wire ?

Answer : Maximum current flow due to Short circuit, limited value of fuse will burn else apparatus and conductor will be damaged.

Description : Which wire can carry a higher current stranded wire or solid wire?

Answer : From the formula R=PL/A resistance rise with the fall of surface area ,inverse proportion relation between Resistance and Area ,so stranded wire has more area that a solid wire so more area less resistance. Less resistance/less electron flow opposition,more electron flow (current)

Description : What happens to the resistance when the current increases?

Answer : Resistance  reduces  when  current  increases.

Description : What happens when you reverse the direction of the current in an electromagnet?

Answer : When  you  reverse  current  direction  in  an  electromagnet,  the magnetic  poles  will  also  change.

Description : How is electricity passed through a wire?

Answer : A  wire contains  mobile  electrons  as  majority  charge  carriers  and  holes  as minority  charge carriers when  an emf  or   potential  diffrence is  provided , electrons  flow  in opposite  direction  with  holes(convection current  flow)

Description : Why should switch be connected only on the live wire and never on the neutral wire?

Answer : Current runs from the transformer, through the protective device, through the load and back through the protective device (if on RCD).  If the protective device is only a CB the current passes ... the circuit will operate correctly but this is an unsafe practice and does not meet the standards.

Description : Increasing the number of turns of wire on the secondary of a transformer will  (A) Decrease the secondary current (B) Increase the primary current (C) Have no effect on the secondary current (D) Increase the secondary current

Answer : Increasing the number of turns of wire on the secondary of a transformer will Decrease the secondary current 

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 : Wire-wound resistors are unsuitable for use at high frequencies because they?

Answer : Wire-wound resistors are unsuitable for use at high frequencies because they exhibit unwanted inductive and capacitive effects.

Description : What is ACCC wire?

Answer : Aluminum Conductor Composite Core

Description : The initial rate of rise of current through a coil of inductance 10 H when suddenly connected to a D.C. supply of 200 V is_______Vs.

Answer : The initial rate of rise of current through a coil of inductance 10 H when suddenly connected to a D.C. supply of 200 V is 20 Vs

Description : When an alternating current passes through an ohmic resistance the electrical power converted into heat is?

Answer : When an alternating current passes through an ohmic resistance the electrical power converted into heat is true power.

Description : When a child is born, what happens to its blood circulation ? (1) Its blood flows for the first time (2) Its blood reverses its flow through the heart (3) Its blood ceases to pass from one atrium to the other (4) Its blood carries wastes for the first time

Answer : Its blood carries wastes for the first time

Description : State functions of ; i) Cable box ii) Guard wire iii) Shackle insulator iv) Stay wire used in service connection

Answer : i) Function of Cable box: To hold and inspect incoming and outgoing terminals  ii) Function of Guard wire : A grounded conductor placed beneath an overhead transmission line in order to ground ... in service connection: To give mechanical Support to pole, line and prevent leakage current if any

Description : The function of steel wire in ACSR conductors is (A) To take care of surges. (B) To reduce corona. (C) To reduce inductance. (D) To provide additional mechanical strength

Answer : The function of steel wire in ACSR conductors is To provide additional mechanical strength

Description : A fuse wire should have :  (A) Low specific resistance and high melting point (B) Low specific resistance and low melting point (C) High specific resistance and high melting point (D) High specific resistance and low melting point

Answer : A fuse wire should have : High specific resistance and low melting point

Description : Aluminium is not used as winding wire for the armature of a dc machine because  (1) aluminium has low resistivity (2) a large winding space is taken by aluminium conductors and creates ... ) the thermal conductivity of aluminium is low (4) aluminium has low conductivity as compared to copper

Answer : Aluminium is not used as winding wire for the armature of a dc machine because  (2) a large winding space is taken by aluminium conductors and creates jointing problems (3) the thermal conductivity of aluminium is low (4) aluminium has low conductivity as compared to copper

Description : Nichrome wire is an alloy of?

Answer : Nichrome wire is an alloy of nickel and chromium.

Description : If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes?

Answer : If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes 0.4 ohm.

Description : The resistance of a few meters of wire conductor in closed electrical circuit is?

Answer : The resistance of a few meters of wire conductor in closed electrical circuit is practically zero.

Description : A trolley wire weighs 1.2 kg per meter length. The ends of the wire are attached to two poles 20 meters apart. If the horizontal tension is 1500 kg find the dip in the middle of the span?

Answer : A trolley wire weighs 1.2 kg per meter length. The ends of the wire are attached to two poles 20 meters apart. If the horizontal tension is 1500 kg find the dip in the middle of the span 4.0 cm.

Answer : In order to achieve high accuracy, the slide wire of a potentiometer should be as long as possible.

Answer : The ground wire should not be smaller than No 10 copper.

Description : How do magnets and copper wire make electricity?

Answer : According  to  Faradays  law , a changing  magnetic  field  on  a  conductor  induses  current  in  the  conductor  through   mutual  induction.

Description : Which color wire is neutral?

Answer : Black but I think it depends with the place.

Description : When electric current passes through a bucket full of water, lot of bubbling is observed. This suggests that the type of supply is?

Answer : When electric current passes through a bucket full of water, lot of bubbling is observed. This suggests that the type of supply is D.C.

Description : When electric current passes through a metallic conductor, its temperature rises. This is due to?

Answer : When electric current passes through a metallic conductor, its temperature rises. This is due to collisions between conduction electrons and atoms.

Description : A conductor of diameter d, length 1 consumes a power of W when a current I flows through it. What will be the power consumed if d is doubled, 1 is halved and current is tripled ?

Answer : A conductor of diameter d, length 1 consumes a power of W when a current I flows through it. What will be the power consumed if d is doubled, 1 is halved and current is tripled ?  72 W

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 : Can you make alternating current through a battery?

Answer : Yes, we can make AC through a battery using an inverter.

Description : Electric current passing through the circuit produces?

Answer : Electric current passing through the circuit produces thermal effect.

Description : Current velocity through a copper conductor is

Description : The transit time of the current carriers through the channel of a JFET decides it's?

Answer : The transit time of the current carriers through the channel of a JFET decides it's gate characteristics.

Description : A sine wave voltage is applied across an inductor. When the frequency of the voltage is decreased, the current decreases.

Answer : The question seems to be wrong. Increase in frequency would actually decrease the current through the Inductor. This happens because inductive reactance Xl is directly proportional to frequency. And if frequency increases the value of Xl would ... vice versa. Xl= 2*pi*f*L I=E/Z Z=sqrt(R^2+Xl^2)

Description : What happens to the resistance of a wire when its length as well as the cross-sectional area are doubled? A) It doubles B) It becomes 4 times C) It becomes 2π times D) It remains the same

Answer : Automatically the resistivity will increase as they are the factors affecting the resistivity 

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

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

Description : In the induction type directional over current relay, when a short-circuit occurs in the circuit (A) power flows in reverse direction (B) power flows in normal direction (C) directional power element does not operate (D) over current element is not energized

Answer : In the induction type directional over current relay, when a short-circuit occurs in the circuit power flows in reverse direction

Description : A network is said to be under resonance when the voltage and the current at the network input terminals are (A) in phase (B) out of phase (C) in phase quadrature (D) in phase, and have equal magnitudes

Answer : A network is said to be under resonance when the voltage and the current at the network input terminals are in phase

Description : When one leg of parallel circuit is opened out the total current will?

Answer : When one leg of parallel circuit is opened out the total current will decrease.

Answer : When a conductor carries more current on the surface as compared to core, it is due to skin effect.

Description : When secondary of a current transformer is open-circuited its iron core will be?

Answer : When secondary of a current transformer is open-circuited its iron core will be hot because of heavy iron losses taking place in it due to high flux density.

Answer : SCR turned off when the anode current falls below holding current.

Description : What kills, current or voltage?

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

Description : What is the relationship between power and current?

Answer : P = I2R Where P = power I = Current R = Resistance This the relationship between current and power.

← Prev Question Next Question →
Ask a Question
Choose topic