A large magnet is broken into two pieces so that their lengths are in the ratio 2:1. The pole strengths of the two pieces will have the ratio
(A) 2 : 1
(B) 1 :2
(C) 4 : 1
(D) 1 : 1
1 Answers
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Masses of three pieces of wires made of the same metal are in the ratio 1 : 3 : 5 and their lengths are in the ratio 5 : 3 : 1.
Correct answer is (D) 125 : 15 : 1
2 Answers 1 views
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.
2 Answers 2 views
Describe an activity to draw a magnetic field line outside a bar magnet from one pole to another pole.
2 Answers
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Two pieces of wire A and B of the same material have their lengths in the ratio 1:2, and their diameters are in the ratio 2:1.
Correct option is: (C) 1 : 8
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
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 is cut into two equal parts vertically and half part of bar magnet is kept on the other such that opposite poles align each other.
When bar magnet is cut into two equal parts, then magnetic moment of each part becomes half of the original directed from S to N pole. ∴ Magnetic moment of the combination...
2 Answers 1 views
Magnetic lines of force originate from …………… pole and end at …………….. pole outside the magnet.
Correct option is: (B) north, south
2 Answers 1 views
A Shell Initially at rest explodes into two pieces of equal mass the two pieces will
2) move with the same velocity in opposite directions The two masses are equal, so to conserve linear momentum which is zero, they should move in the opposite directions with equal...
2 Answers 1 views
Two wires made of the same material are subjected to forces in the ratio of `1:4`. Their lengths are in the ratio `8:1` and diameter in the ration 2:1
Correct Answer - `1:2`
2 Answers 2 views