At a place, the horizontal and vertical components of the Earth's magnetic field are 0.4 G and 0.3 G respectively. The total field and the angle of dip are about:
Q128.AI-generated practiceSingle-correct MCQEasy
The magnitude of the Earth's magnetic field at its surface is of the order of:
A short bar magnet of moment 1.6 A m2 is placed with its north pole pointing geographic south, at a place where the horizontal component of the Earth's field is 4 × 10-5 T. The neutral points are located on the axis of the magnet at a distance from its centre of (μ0/4π = 10-7 T m/A):
The Earth's magnetic field resembles that of a giant bar magnet whose:
Q131.AI-generated practiceSingle-correct MCQHard
A circular coil of 10 turns and radius 10 cm is placed in the magnetic meridian, and a small compass is placed at its centre. With a current I in the coil, the compass deflects by 45° from the meridian. If the horizontal component of the Earth's field is 3.14 × 10-5 T, I is (μ0 = 4π × 10-7 T m/A):
At a place where the angle of dip is 45°, the horizontal and vertical components of the Earth's field are related as:
Q133.AI-generated practiceSingle-correct MCQEasy
The instrument used to measure the angle of dip at a place is the:
Q134.AI-generated practiceSingle-correct MCQHard
At a place, the horizontal component of the Earth's field is √3 times its vertical component. The angle of dip there is:
Q135.AI-generated practiceNumerical valueEasy
At a place, the horizontal and vertical components of the Earth's magnetic field are equal. Find the angle of dip in degrees.
Q136.AI-generated practiceNumerical valueMedium
At a place, the horizontal component of the Earth's field is 3 × 10-5 T and the vertical component is 4 × 10-5 T. If the total field is x × 10-5 T, find x.
Q137.AI-generated practiceNumerical valueMedium
At a place the Earth's total magnetic field is 6 × 10-5 T and the angle of dip is 30°. If the vertical component is x × 10-5 T, find x.
Q138.AI-generated practiceNumerical valueHard
At a place, the apparent angles of dip measured in two mutually perpendicular vertical planes are both 45°. Find the true angle of dip in degrees, to the nearest integer.
Q139.AI-generated practiceAssertion–ReasonMedium
Assertion (A): A magnetic compass cannot be used reliably to find directions near the Earth's magnetic poles. Reason (R): Near the magnetic poles, the horizontal component of the Earth's field is nearly zero.
Q140.AI-generated practiceAssertion–ReasonHard
Assertion (A): The angle of dip at the magnetic equator is zero. Reason (R): At the magnetic equator, the vertical component of the Earth's field is maximum.