A magnetic dipole has magnetic length 10 cm and pole strength 100 Am. Its magnetic dipole moment is ……… Am2.
(A) 1000
(B) 500
(C) 10
(D) 5
1 Answers
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Describe an activity to draw a magnetic field line outside a bar magnet from one pole to another pole.
Objective should be replaced with observation.
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Describe an activity to draw a magnetic field line outside a bar magnet from one pole to another pole.
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(a) The length of Rameshs notebook is 9 cm 5 mm. What will be its length in cm? (b) The length of a young gram plant is 65 mm. Express its length in c
Correct Answer - (a) 9.5 सेमी: `" "`(b) 6.5 सेमी:
2 Answers 1 views
Explain the pole strength and magnetic dipole moment of a bar magnet.
i. The bar magnet said to have pole strength +qm and -qm near the north and south poles respectively. ii. As bar magnet has two poles with equal and opposite pole strength, it is...
2 Answers 6 views
State the SI units of pole strength and magnetic dipole moment.
1. SI unit of pole strength (qm) is Am. 2. SI unit of magnetic dipole moment (m) is Am2.
2 Answers 1 views
A bar magnet of magnetic moment 5.0 Am^2 has the poles 20 cm apart. Calculate the pole strength.
Given: m = 5.0 Am2, 2l = 20 cm = 0.20 m To find: Pole strength (qm) Formula: qm = \(\frac{m}{2l}\) Calculation: From formula. qm = \(\frac{5.0}{0.20}\) = 25 Am
2 Answers 1 views
A bar magnet has magnetic moment 3.6 Am^2 and pole strength 10.8 Am. Determine its magnetic length and geometric length.
Given: m = 3.6 Am2, qm = 10.8 Am To find: i. Magnetic length ii. Geometric length Formulae: i. Magnetic length = \(\frac{m}{q_m}\) ii. Geometric length = \(\frac{6}{5}\) × magnetic length. Calculation: From formula (i), Magnetic length = \(\frac{3.6}{10.8}\) = 0.33 m From formula (ii), Geometric length...
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Magnetic lines of force originate from …………… pole and end at …………….. pole outside the magnet.
Correct option is: (B) north, south
2 Answers 1 views
The magnetic induction B and the force F on a pole of strength m are related by
Correct option is: (C) F = m B
2 Answers 2 views
A bar magnet of length `10cm` and pole strength `2 Am` makes an angle `60^(0)` with a uniform magnetic field of induction `50T`. The couple acting on
Correct Answer - A `C=MB sin theta`
2 Answers 1 views