# Current carrying conductor

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## Related questions

If the diameter of the current carrying conductor increases then the corona loss (a) increases (b) decreases (c) remains unchanged (d) none of these

A 300 mm long conductor is carrying a current of 10 A and is situated at right angles to a magnetic field having a flux density of 0.8 T ; the force on the conductor will be

The insulation on a current carrying conductor is provided?

Two parallel conductors are separated by a distance, d carrying a current, I in the same direction. The magnetic field along a line running parallel to the conductors and midway between them is (A) zero (B) proportional to I (C) proportional to d (D) proportional to the permeability of the medium.

The magnetic field on the axis of a current carrying polygonal coil will have only a horizontal component parallel to the Plane of the coil

Comparing the total copper cross sections in terms of current-carrying capacity for a single-phase and a three-phase 120 V system with effective load resistance of 15Ω, will yield: A. single-phase 32 A; three-phase 16 A B. single-phase 16 A; three-phase 8 A C. single-phase 8 A; three-phase 4 A D. single-phase 16 A; three-phase 0 A

The magnetic field intensity at the centre of a current carrying coil of diameter J m is K. The current flowing in the coil is

If 120 Coulomb of charge passes through a conductor in 60 sec, the current in the conductor is

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 ?

5xl016 electrons pass across the section of a conductor in 1 minute 20 sec. The current flowing is

Skin effect occurs when a conductor carries current at_____ frequencies.

As per Electricity Act, ____________means any line which is used for carrying electricity for any purpose.  (A) Electric line (B) Transmission line (C) All of the above (D) None of the above

When 7/0.029 V.I.R cable is carrying 20 A, a drop of 1 V occurs every 12 m. The voltage drop in a 100 m run of this cable when it is carrying 10 A is nearly  (a) 4.2 V (b) 3.2 V (c) 1.2 V (d) 0.42 V

For proper earthing, what should be the maximum value of earth resistance while carrying out the testing of earth continuity path ?   (a) 1 Ω (b) 2 Ω (c) 5 Ω (d) 10 Ω

A conductor of length L has current I passing through it, when it is placed parallel to a magnetic field. The force experienced by the conductor will be

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

Heat in a conductor is produced on the passage of electric current due to?

Current velocity through a copper conductor is

A moving coil instrument has a resistance of 10 W and gives full scale deflection when carrying a current of 50 mA. To measure current upto 100 A, we will have to connect • 10 W resistance in series • 10 W resistance in parallel • 10/1999 W resistance in series • 10/1999 W resistance in parallel

A long wire carrying 100 amp is placed in an external magnetic field of 50 gauss. The wire is at right angles to the field.

The diameter of conductor used in LT 660 V grade power cables depends on

Number of commutator bars for a 4-pole, 2-layer, DC lap winding with 24 slots and one conductor per layer is (A) 48 (B) 24 (C) 192 (D) 96

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

If a positively charged body is placed inside a spherical hollow conductor, what will be the polarity of charge inside and outside the hollow conductor ? (a) Inside positive, outside negative (b) Inside negative, outside positive (c) Both negative (d) Both positive

At temperatures above a limiting value, the energy of lattice vibrations, in a conductor, increases linearly with temperature so that resistivity increases linearly with temperature. In this region, this limiting value of temperature is called

Best conductor of heat and electricity is (A) nickel (B) copper (C) chromium (D) aluminium

In a d.c. machine the force on a conductor placed on the periphery of the conductor is (a) directly proportional to parallel path (b) inversely proportional to the parallel path (c) inversely proportional to the length of the conductor (d) none of these

A type of conductor known as expanded ACSR has a filler separating inner steel strands from outer aluminium strands and this filler is (a) mica sheet (c) paper tape (b) cotton tape (d) aluminium foil

The short length of the conductor used to connect the line conductor on one side of the terminal pole to the line conductor on the other side of the pole is known as : a)jumper c) guard b) petticoat d) guy

The effective resistance of a conductor will be the same as ohmic resistance when : -  a) current is in true sine wave form b) voltage is low c) power factor is unity d) current is uniformly distributed in the conductor cross-section

Aluminium conductor cables can be joined by   (a) Gas welding (b) Soldering (c) Compression (d) Thermit welding

The skin effect of the conductor increases the effective value of   (a) Inductance of the conductor (b) Resistance of the conductor (c) Capacitance of the conductor (d) None of these

With the increase in the cross sectional area of the conductor, the value of resistance:  (1) Increase (2) Remain same (3) Decrease (4) None of these

Upon increasing the transmission voltage, volume of the conductor will:  (A) increase (B) not change (C) decrease (D) increase for some time and then decrease

The size of a conductor used in power cables depends on the:  (A) operating voltage  (C) current to be carried (B) power factor (D) type of insulation used

When a conductor cuts magnetic flux, an emf is induced in the conductor. This is known as  (a) Joule's law (b) Faraday's law (c) Coulomb's law (d) Ampere’s law

A conductor is composed of seven identical copper strands, each having a radius 'R'. Then what is self GMD (Geometric Mean Distance) of the conductor?  (A) 2.645 R (B) 2.177 R (C) 2.141 R (D) 1.21 R

A Transmission line conductor has been suspended freely from two towers and has taken the form of a catenary that has c = 487.68m. The span between the two towers is 152 m, and the weight of the conductor is 1160 kg/km. Calculate the length of the conductor.  (A) 487.68 m (B) 152.614 m (C) 5.934 m (D) 11.9 m

Which is the best conductor of electricity?

what are the examples of poor conductor ?

resistance of conductor depends on?

what is the temperature coefficient of Resistance of conductor ?