# The force acting between two magnetic poles is

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The force acting between two magnetic poles is

The force acting between two magnetic poles is inversely proportional to the square of the distance

## Related questions

Which of the statements about the force between two charge is true?  (1) Unlike charges repel each other (2) Like charges attract each other (3) No force exists between two unlike charges (4) A force of repulsion exists between two like charges

When the separation between two charges is made four times, the force between them  (a) increases four times (b) decreases four times (c) increases sixteen times (d) decreases sixteen times

A single force and a couple acting in the same plane upon a rigid body?

A force acting on a body may?

The coefficient of coupling between two coils is 0.45. The first coil has an inductance of 75 mH and the second coil has an inductance of 105 mH. What is the mutual inductance between the coils?  (1) 3.54 mH (2) 7.88 mH (3) 39.9 mH (4) 189.3 mH

Twelve 1 ohm resistances are used as edge to form a cube. The resistance between two diagonally opposite corners of the cube is:  (1) 5/6 ohm (2) 1 ohm (3) 6/5 ohm (4) 3/2 ohm

Define the following terms: i) Magnetic flux density, ii) Reluctance, iii) Magneto-motive force, iv) Permeance.

Define magnetic lines of force. Show the magnetic lines of force for bar type magnet.

Two non-collinear parallel equal forces acting in opposite direction?

The introduction of interpoles in between the main poles improves the performance of DC machines because: (A) the interpole produces additional flux to augment the torque developed (B) the flux waveform is improved with reduction in harmonics (C) the inequality of air flux on the top and bottom halves of the armature is removed (D) a counter emf is induced in the coil undergoing commutation

The data recording area between the blank gaps on magnetic tape is called a/an:  (a) record (b) block (c) field (d) database

When the north poles of two bar magnets are brought close together, there will be: A. no force B. a downward force C. a force of attraction D. a force of repulsion

The transient step response of two systems exhibits same peak time. The dominant poles of the two systems can be represented in s plane along  A) A line parallel to X axis B) A line parallel to Y axis C) A line at an angle to negative real axis D) A semicircle

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?

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

A field of force can exist only between?

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

How much is the potential difference between two points if 0.5 J of energy is required to move 0.4 C of charge between the two points?

The most accurate instrument for measuring phase difference between two signals is (A) X− Y plotter (B) oscilloscope (C) phase sensitive detector (D) electronic counter/timer

A transmission line is operating with a Phase shift of 80° between two ends. If the load is suddenly increased A) The phase displacement will increase B) The phase displacement will decrease C) The phase displacement will not change D) The surge impedance will increase

In case of split phase motor, the phase shift between currents in the two windings is around  A) 30° B) 70° C) 90° D) 120°

The Hamming distance between two code-words is (A) the number of places the code-words are same (B) same as the Euclidean distance between their decimal representation (C) is maximum of the either code-words (B) the number of places the code-words differ

When the phase difference between two sinusoidal quantities is 90° they are said to be ______ A) Phase right angle B) Phase quadrature C) Phase sinuright D) None of these

The distance between two coil sides which are connected to the same commutator segment is called as  (1) winding pitch (2) back pitch (3) front pitch (4) full pitch

Which of the following test is carried out to ensure the sufficient strength of insulation between two or more conductors to avoid leakage between them ?   (a) Testing of insulation resistance between wiring and earth (b) Testing of insulation resistance between conductors (c) Testing of polarity of single phase switch (d) Testing of earth continuity path

Two waves of the same frequency have opposite phase when the phase angle between them is?

A rectangular magnet of magnetic moment M is cut into two piece of same length, the magnetic moment of each piece will be

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.

Poles which produce high Q factor in active RC filters are  A) On the negative real axis close to origin B) On the negative real axis away from origin C) Complex poles away from imaginary axis D) Complex poles near the imaginary axis

If 27 J of energy is expended in moving 3 C of charge between two points, how much voltage is there between those two points?

How much energy is expended, in joules, if a voltage of 12 V moves 1.25 C of charge between two points?

The coefficient of coupling between two air core coils depends on   (A) mutual inductance between two coils only (B) self inductances of the two coils only (C) mutual inductance and self inductances of the two coils (D) none

What will be the phase angle between two alternating waves of equal frequency, when one wave attains maximum value the other is at zero value ?

Can the electric field between two positive charges be zero?

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.

In thermo-couple instruments, in which of the following is an emf caused if the junction of two wires of dissimilar metals is heated and the free or cold ends are connected to a milli-voltmeter? A) Kelvin effect B) Hot wire effect C) Seebeck effect D) Faraday effect

The condition for parallel operation of two inverters is • Amplitude of voltages should be same. • Frequency of voltages should be same. • Both the voltages should be in same phase. • All the three above.

What is the time response of a system whose poles lie on the right hand side of s-plane? A) Exponentially increasing B) Exponentially decreasing C) Sinusoidal oscillations D) Step response