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Choose the correct option.A place where the horizontal component of Earth's magnetic field is zero lies at - Physics

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प्रश्न

Choose the correct option.

A place where the horizontal component of Earth's magnetic field is zero lies at

विकल्प

  • geographic equator

  • geomagnetic equator

  • one of the geographic poles

  • one of the geomagnetic poles

MCQ
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उत्तर

A place where the horizontal component of Earth's magnetic field is zero lies at one of the geomagnetic poles.

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  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 12: Magnetism - Exercises [पृष्ठ २२८]

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बालभारती Physics [English] Standard 11 Maharashtra State Board
अध्याय 12 Magnetism
Exercises | Q 1. (vi) | पृष्ठ २२८

वीडियो ट्यूटोरियलVIEW ALL [2]

संबंधित प्रश्न

A compass needle, free to turn in a vertical plane orients itself with its axis vertical at a certain place on the earth. Find out the values of (i) horizontal component of earth's magnetic field and (ii) angle of dip at the place.


A conducting rod held horizontally along East- West direction is dropped from rest from a certain height near the Earth’s surface. Why should there be an induced emf across the end of the rod? Draw a plot showing the instantaneous variation of emf as a function of time from the instant it begins to fall.


A compass needle which is allowed to move in a horizontal plane is taken to a geomagnetic pole. It ______.


The horizontal component of the earth's magnetic field at a place is `1/sqrt(3)` time the vertical component. Determine the angle of dip at that place.


State Tangent Law in magnetism.


A charge particle after being accelerated through a potential difference ‘V’ enters in a uniform magnetic field and moves in a circle of radius r. If V is doubled, the radius of the circle will become ______.


Choose the correct option.

The horizontal and vertical component of magnetic field of Earth are same at someplace on the surface of Earth. The magnetic dip angle at this place will be


Answer the following question regarding earth’s magnetism:

The earth’s field, it is claimed, roughly approximates the field due to a dipole of magnetic moment 8 × 1022 J T−1 located at its centre. Check the order of magnitude of this number in some way.


The earth’s core is known to contain iron. Yet geologists do not regard this as a source of the earth’s magnetism. Why?


At a certain location in Africa, a compass points 12° west of the geographic north. The north tip of the magnetic needle of a dip circle placed in the plane of magnetic meridian points 60° above the horizontal. The horizontal component of the earth’s field is measured to be 0.16 G. Specify the direction and magnitude of the earth’s field at the location.


A short bar magnet placed in a horizontal plane has its axis aligned along the magnetic north-south direction. Null points are found on the axis of the magnet at 14 cm from the centre of the magnet. The earth’s magnetic field at the place is 0.36 G and the angle of dip is zero. What is the total magnetic field on the normal bisector of the magnet at the same distance as the null point (i.e., 14 cm) from the centre of the magnet? (At null points, field due to a magnet is equal and opposite to the horizontal component of earth’s magnetic field.)


A long straight horizontal cable carries a current of 2.5 A in the direction 10° south of west to 10° north of east. The magnetic meridian of the place happens to be 10° west of the geographic meridian. The earth’s magnetic field at the location is 0.33 G, and the angle of dip is zero. Locate the line of neutral points (ignore the thickness of the cable)? (At neutral points, magnetic field due to a current-carrying cable is equal and opposite to the horizontal component of earth’s magnetic field.)


A compass needle free to turn in a horizontal plane is placed at the centre of circular coil of 30 turns and radius 12 cm. The coil is in a vertical plane making an angle of 45° with the magnetic meridian. When the current in the coil is 0.35 A, the needle points west to east.

(a) Determine the horizontal component of the earth’s magnetic field at the location.

(b) The current in the coil is reversed, and the coil is rotated about its vertical axis by an angle of 90° in the anticlockwise sense looking from above. Predict the direction of the needle. Take the magnetic declination at the places to be zero.


Which of the following statements about earth's magnetism is correct?


If the inclination is θ, the horizontal component of the earth’s field is HE and the vertical component of the earth’s field is ZE, then tan(θ) is ______.


The earth’s magnetic field always has a vertical component except at the ______.

At magnetic poles, the angle of dip is ______.

At the magnetic north pole of the earth, the value of the horizontal component of earth’s magnetic field and angle of dip are respectively.

Which of the following is responsible for the earth’s magnetic field?

Which of the following is responsible for the earth’s magnetic field?


Which of the following independent quantities is not used to specify the earth’s magnetic field?


The angle of dip at a certain place where the horizontal and vertical components of the earth’s magnetic field are equal is ______.


The small angle between magnetic axis and geographic axis at a place is ______.


A 10-meter wire is kept in east-west direction. It is falling down with a speed of 5.0 meter/second, perpendicular to the horizontal component of earth's magnetic field of 0.30 × 10−4 weber/meter2. The momentary potential difference induced between the ends of the wire will be:


At a place of latitude 5°, angle of dip is nearly


The earth's magnetic field at a certain place has a horizontal component 0.3 gauss and the total strength 0.5 gauss. The angle of dip is ______.


Consider the plane S formed by the dipole axis and the axis of earth. Let P be point on the magnetic equator and in S. Let Q be the point of intersection of the geographical and magnetic equators. Obtain the declination and dip angles at P and Q.


The earth's magnetic field lines resemble that of a dipole at the centre of the earth. If the magnetic moment of this dipole is close to 8 × 1022 Am2, the value of earth's magnetic field near the equator is close to ______. (radius of the earth = 6.4 × 106 m)


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