मराठी

Define the agonic line.

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प्रश्न

Define the agonic line.

व्याख्या
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उत्तर

A line which joins all the places on earth, having zero angle of declination is called agonic line.

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पाठ 11: Electricity and Magnetism – 2 - Exercise (B) Subjective Questions

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गोयल ब्रदर्स प्रकाशन A New Approach to ICSE Physics Part 1 [English] Class 9
पाठ 11 Electricity and Magnetism – 2
Exercise (B) Subjective Questions | Q 5.2

संबंधित प्रश्‍न

Fill in the following blank with suitable words: 

The earth's magnetic field is rather like that of a .......... magnet with its .......... pole in the northern hemisphere.


The shape of the earth's magnetic field resembles that of an imaginary:

(a) U-shaped magnet
(b) Straight conductor carrying current
(c) Current-carrying circular coil
(d) Bar magnet


A magnetic field exerts no force on:

 an electrical charge moving perpendicular to its direction
 an unmagnetised iron bar
 a stationary electric charge
 a magnet


Complete the following sentence :

If the field lines in a magnetic field are parallel and equidistant, the magnetic field is __________  .


Which substances are used for making electromagnets?


A charge of 5000 C flows through an electric circuit in 2 hours and 30 minutes. Calculate the magnitude of current in a circuit.


State briefly the modern views on magnetism.


What do you mean by the term lines of the magnetic field?

A student fixes a white sheet of paper on a drawing board. He places a bar magnet in the centre and sprinkles some iron filings uniformly around the bar magnet. Then he taps gently and observes that iron filings arrange themselves in a certain pattern. 

  1. Why do iron filings arrange themselves in a particular pattern?
  2. Which physical quantity is indicated by the pattern of field lines around the bar magnet?
  3. State any two properties of magnetic field lines.

A closely wounded circular coil of radius 5 cm produces a magnetic field of 37.68 × 10-4 T at its center. The current through the coil is ______ A. [Given, number of turns in the coil is 100 and π = 3.14)


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