# The electric field lines and equipotential lines...

12 views
The electric field lines and equipotential lines :

(A) are parallel to each other (B) are one and the same

(C) cut each other orthogonally (D) can be inclined to each other at any angle

The electric field lines and equipotential lines : cut each other orthogonally

## Related questions

1 answer 5 views
0 answers 69 views

The economic size of a conductor in transmission and distribution lines of electric power is decided by (a) Ohm’s law (b) Kelvin’s law (c) Kirchhoff’s law(d) Faraday’s law

1 answer 14 views

Which of the following is the name given to the lines of electric force which move so that its beginning traces a closed curve on a positive surface and its end traces a corresponding closed curve on the negative surface? A) Tube of surface B) Tube of lines C) Tube of force D) Tube of electricity

1 answer 6 views
1 answer 24 views

The ability of materials to become polarized under an applied electric field is called _______ A) Ferroelectricity B) Paraelectricity C) Polectricity D) None of these

1 answer 57 views

The electric field inside a hollow conducting sphere ________ A) Depends on the diameter of the sphere  B) Varies according to the direction of earth’s magnetic poles C) Is zero  D) None of these

1 answer 16 views
1 answer 21 views

What is the direction of the induced electric field?

1 answer 15 views

Can the electric field between two positive charges be zero?

1 answer 27 views

What is the direction of the electric field?

1 answer 32 views

An electric motor in which both stator field and rotor rotates with same speed is called?

1 answer 25 views

Is electric potential zero when electric field is zero?

1 answer 18 views

The main limitation for power handling capability of short length transmission lines and cables is (A) power factor (B) stability (C) thermal effect limit (D) conductor size

0 answers 60 views

Transposition of communication and power lines reduces the induced voltages due to electrostatic and electromagnetic induction to a considerable extent. The lines shall be transposed to______ of the length in one barrel. (a) 1/4 (c) 1/6 (b) 1/5 (d) 1/3

0 answers 21 views

Briefly describe the electric field of a static charge.

0 answers 16 views

In a parallel plate capacitor of capacitance Co, the electric field is E. If a dielectric slab with dielectric constant = 7 is introduced to fill capacitor completely, the electric field will become (a) 7E (b) E/7 (c) E/3.5 (d) E. Co

1 answer 9 views
1 answer 19 views
1 answer 7 views
1 answer 17 views

MOSFET uses the electric field of?

1 answer 16 views

Which of the following laws relates the magnetic field to the magnitude, direction, length, and proximity of the electric current? A) Lenz’s law B) Faraday’s law C) Biot–Savart law D) None of these

1 answer 22 views

The induced voltage across a coil with 250 turns that is located in a magnetic field and is changing at a rate of 8 Wb/s is A. 1,000 V B. 2,000 V C.31.25 V D. 3,125 V

1 answer 19 views

The supply both to field and armature circuits are disconnected simultaneously in a separately excited dc motor and it comes to a standstill in 5 sec. If the armature circuit of this motor is disconnected from supply with field circuit remaining energized, the motor would come to rest in (1) 5 sec (2) 7 sec (3) 4 sec (4) A very long time

1 answer 20 views

If shunt generator delivers 100 A at 200 V, and the resistance of the shunt field and armature are 100 ohm and 0.01 ohm respectively, the generated e.m.f. will be : -  a) 212 V b) 205 V c) 210 V d) 201.02 V

0 answers 421 views

A shunt motor rotating at 1500 r/min is fed by a 120 V source. The line current is 51 A and the shunt field resistance is 120 ohm. If the armature resistance is 0.1 ohm, calculate the current in the armature.  (A) 1 A (B) 51 A (C) 50 A (D) 12 A

0 answers 24 views

What is the energy stored in the magnetic field at a solenoid of 40 cm long and 4 cm diameter wound with 100 turns of wire carrying a current at 20A?  (A) 0.705 Joule (B) 0.789 Joule (C) 0.587 Joule (D) 0.658 Joule

0 answers 17 views

A DC shunt generator supplies 450 A at 230 V. The resistances of shunt field and armature are 50 Ω and 0.025 Ω respectively. What will be the armature voltage drop?  (A) 11.24 V (B) 22.7 V (C) 31.6 V (D) 38.4 V

1 answer 19 views

Which of the following statements holds for the divergence of electric and magnetic flux densities?  A) Both are zero B) These are zero for static densities but non zero for time varying densities C) It is zero for electric flux density D) It is zero for magnetic flux density

1 answer 105 views
2 answers 27 views

Electrostatics : Electric Field & Potential

1 answer 41 views

How can a magnetic field be used to generate an electric current?

0 answers 8 views

A separately excited dc generator is running at rated speed and at no load. If its field winding is suddenly connected to a dc source then rise in armature generated voltage is governed by (1) Armature time constant (2) Field time constant (3) Both (a) and (b) (4) Mechanical time constant

1 answer 13 views
1 answer 14 views

The number of cross -points needed for 10 lines in a cross-point switch which is full duplex in nature and there are no self connection is  A) 100 B) 45 C) 50 D) 90

0 answers 17 views

In case of open circuited transmission lines the reflection coefficient is given by (A) 1 (B) -1 (C) 0.5 (D) 0

0 answers 11 views

The insulation resistance test is performed on power lines with   (a) ohm meter (b) earth tester (c) megger (d) Any of these

1 answer 26 views

The insulation strength of EHV lines is mainly governed by   (a) Switching overvoltages (b) Lightning overvoltages (c) Power frequency overvoltages (d) Dynamic overvoltages

1 answer 19 views

Hollow conductors are used in the transmission lines to:  (1) Improve heat dissipation (2) Reduce corona loss (3) Reduce skin effect (4) Reduce the line inductance

0 answers 13 views

What is the minimum clearance of HV Lines from ground across streets?  (A) 3 meters (B) 8 meters (C) 6 meters (D) 5 meters

1 answer 13 views

if the rated voltage from the power lines is applied to the primary of a single-phase transformer which is operated on no-load, then

1 answer 13 views
1 answer 5 views

Explain the concept of field emission and give its two applications.

0 answers 64 views
1 answer 10 views

What arc the errors occurring in measuring devices due to stray magnetic field and temp '? Explain how to compensate them.

1 answer 12 views

An iron ring of mean circumference 80 cm is uniformly wound with 500 turns of wire and carries 0.8A. Find the magnetic field strength.

0 answers 20 views

Give the relation between magnetic field strength, magnetic flux density and permeability.

1 answer 14 views

At a particular temperature and current density, the critical magnetic field for a Type I superconductor is Bc and that for a type II superconductor ranges from Bc1 to Bc2 keeping other parameters unloaded. both superconductors are now subjected to a magnetic field B that satisfies the conditions B>Bc and Bc1 < ... will maintain a vortex state  (d) Type I superconductor will switch to the normal conducting state, while Type II superconductor will maintain a vortex sate

0 answers 24 views

What is the best data type definition for Oracle when a field is alphanumeric and has a length that can vary?  (1) VARCHAR2 (2) LONG (3) CHAR (4) NUMBER

1 answer 16 views

It is possible to increase the field flux and, at the same time, increase the speed of a d.c. motor provided its .......... is held constant.

1 answer 11 views

Define magnetic lines of force. Also draw and show magnetic lines of force of a bar type magnet.