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.
asked
Aug 21, 2019
by
anonymous
Description : What happens when a current flows through a wire?
Answer :
Current can produce two effect one is heating effect and second is magnetic effect.
asked
Mar 14, 2018
by
anonymous
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)
asked
Aug 18, 2019
by
anonymous
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.
asked
Aug 18, 2019
by
anonymous
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
asked
Sep 20, 2018
by
anonymous
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
asked
May 8, 2018
by
anonymous
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
asked
May 8, 2018
by
anonymous
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
asked
May 8, 2018
by
anonymous
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
asked
May 3, 2018
by
anonymous
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 jointing problems (3) 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
asked
Apr 29, 2018
by
anonymous
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
asked
Apr 26, 2018
by
anonymous
Description : Nichrome wire is an alloy of?
Answer :
Nichrome wire is an alloy of nickel and chromium.
asked
Mar 25, 2018
by
anonymous
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.
asked
Mar 25, 2018
by
anonymous
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.
asked
Mar 25, 2018
by
anonymous
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.
asked
Mar 25, 2018
by
anonymous
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.
asked
Mar 22, 2018
by
anonymous
Answer :
In order to achieve high accuracy, the slide wire of a potentiometer should be as long as possible.
asked
Mar 21, 2018
by
anonymous
Answer :
The ground wire should not be smaller than No 10 copper.
asked
Mar 20, 2018
by
anonymous
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.
asked
Mar 10, 2018
by
anonymous
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)
asked
Mar 10, 2018
by
anonymous
Description : Which color wire is neutral?
Answer :
Black but I think it depends with the place.
asked
Dec 22, 2017
by
anonymous
Answer :
• Short line approximation for lines that are less than 80 km long. • Medium line approximation for lines whose lengths are between 80 km to 250 km. • Long line model for lines that are longer than 250 km.
Description : What is the full form of ACSR?
Answer :
Aluminum conductor steel rainforce
asked
Mar 10, 2018
by
anonymous
Description : What is electric power generation transmission and distribution?
Answer :
Generation: it wrong word at here.because it is no generation it is conversion of one form of energy into electrical form.it may by using any type of energy. Transmission is just to ... place to other by providing some modifications And distribution means use of this energy for any purpose.
asked
Dec 16, 2017
by
anonymous
asked
Jun 26, 2019
by
Umair
Description : The ‘transportation delays’ occurring in distribution system are detrimental to stability because they produce (a) attenuation (b) phase lag (c) both (a) and (b) (d) transients
asked
May 25, 2018
by
anonymous
Description : The X/R ratio for distribution lines is:
Answer :
Inductance and resistance
asked
May 22, 2018
by
anonymous
Description : For a 66 kV line having span of 200 meters between towers the approximate sag will be 2 m. If the span is double the sag will be: (A) 1 m (B) 2 m (C) 4m (D) 8m
Answer :
For a 66 kV line having span of 200 meters between towers the approximate sag will be 2 m. If the span is double the sag will be: 8m
asked
May 8, 2018
by
anonymous
Answer :
Series capacitors on transmission lines are of little use when the load VAR requirement is small.
asked
Mar 20, 2018
by
anonymous
Answer :
The voltage regulation in magnetic amplifier type voltage regulator is effected by varying the reactance.
asked
Mar 20, 2018
by
anonymous
Answer :
When a conductor carries more current on the surface as compared to core, it is due to skin effect.
asked
Mar 20, 2018
by
anonymous
Answer :
Overhead system can be designed for operation up to 400 kV.
asked
Mar 20, 2018
by
anonymous
Answer :
The underground system cannot be operated above 66 kV.
asked
Mar 20, 2018
by
anonymous
Answer :
Service mains are the conductors, which connect the consumer's terminals to the distribution.
asked
Mar 20, 2018
by
anonymous
Description : Is Aluminium a good conductor of electricity?
Answer :
Yes aluminium is a conductor and it is a good conductor of electricity. But copper have better conductivity as compare to aluminium.
asked
Mar 10, 2018
by
anonymous
Description : Why ACSR conductor is used for overhead lines?
Answer :
It has high tensile strength
asked
Mar 10, 2018
by
anonymous
Description : How electricity is transmitted and distributed?
asked
Mar 10, 2018
by
anonymous
Description : How electricity is distributed?
asked
Mar 10, 2018
by
anonymous
Description : About trnsformer
Answer :
Acc to Ohms law V=IR but it is only applicable when our resistance R is constant, as in case of transformer we take impedence which is equivalent to resistance is not constant it varies with system parameters that why Ohms law not applicable in case of transformer
Description : The place where all cable of wire were join together is?
Description : What is the diameter of the GI pipe through which the earth wire needs to be taken out?
Answer :
13 mm diameter is the diameter of the GI pipe through which the earth wire needs to be taken out.
asked
May 29, 2018
by
anonymous
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
asked
Apr 29, 2018
by
anonymous
Description : What is the resistance of a 160 m wire with a uniform diameter of 0.28 mm, if the specific resistance is 12.32 μΩ-cm? A) 3.2 Ω B) 3.2 μΩ C) 0.8 Ω D) None of these
Answer :
What is the resistance of a 160 m wire with a uniform diameter of 0.28 mm, if the specific resistance is 12.32 μΩ-cm? A) 3.2 Ω B) 3.2 μΩ C) 0.8 Ω D) None of these
asked
Apr 29, 2018
by
anonymous
Description : What is the number of turns of wire needed to provide a potentiometer with a resolution of 0.05 percent ? (a) 200 turns (b) 2000 turns (c) 20 turns (d) 20000 turns
Answer :
B) 2000 turns
asked
Apr 23, 2018
by
anonymous
asked
Mar 16, 2018
by
PRAGATI
asked
Mar 16, 2018
by
Anil
Description : What is resistance wire made of?
Answer :
Resistance wire is made up of Nichrome .
asked
Jan 4, 2018
by
anonymous
Description : 1. In a sitar wire which type of vibration is produced? 2. Howmuch time does a heart beat require approximately? 3. The ordinances issued by the Governor are subject to approval by which office? 4. Which is the highest waterfall of the world? 5. On which bank is Hampi is situated ? 6. What is categorized as ... 18. Malaria parasite and Amoeba are grouped under? 19. Boulder clay is a feature associated with which thing? 20. Who is the author of the concept of Antyodaya ?
Answer :
Answer : 1. Stationary transverse 2. 0.8 second 3. State Legislature 4. Saito Angel Falls 5. Tungabhadra 6. Sorghum 7. M. Visvesvaraya 8. Aluminium 9. Godavari 10. Tipu Sultan 11. Frog 12. ... Jagmohan 14. Jaipur 15. Parts 16. SDR 17. Resistance 18. Protozoa 19. Glacial deposition 20. Vinoba Bhave
Description : Compare between waveguide and two wire transmission line
Answer :
waveguide and two wire transmission line
Description : Identify the odd term amongst the following group : (1) Optical fibre (2) Twisted pair wire (3) Microwaves (4) Coaxial cable
Answer :
Microwaves