To make a compass, point an ordinary iron nail along the direction of Earth’s magnetic field (which, in the Northern Hemisphere, is angled downward as well as northward) and repeatedly strike it for a few seconds with a hammer or a rock. Then suspend it at its center of gravity by a string. Why does the act of striking magnetize the nail?

Q: A current of 1.5 A flows through the windings of a large, thin toroid with 200 turns per meter. If…

A: given quantities: Number of turns per unit length (n) = 200 current flowing(i) = 1.5 A Now, the…

Q: Does a bar magnet exert a torque on itself due to its own field? Does one element of a…

A: The various parts of a bar magnet exert the force and torque on each other. But, it do not exert any…

Q: when a particle of charge q and mass m enters a region of constant magnetic field traveling with a…

A: When the particle proceed into the magnetic field it feels a force inside it. the force experienced…

Q: A ball with a mass of 110 g which contains 4.40x10 excess electrons is dropped into a vertical shaft…

A: Given  Mass = m = 110 g = 0.11 kg Charge = q = 4.40*10⁸ electron Magnetic field =B =  0.3 T Height =…

Q: Earth has a magnetic dipole moment of 8.0 * 10^22 J/T. (a) What current would have to be produced in…

A: a) Current have to be produced in a single turn of wire extending around Earth at its geometric…

Q: A current-carrying wire in the form of a semicircle lies in a plane at right angles to the direction…

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Q: Why is it inadvisable to make a horseshoe magnet from a flexible material?

A: The shape of the magnet in horseshoe shape so it is called as horseshoe magnet. The purpose of shape…

Q: What is the maximum force on an aluminum rod with a 0.100-μC charge that you pass between the poles…

A: Given:  q = 0.1 micro coulomb  B =1.5 T  v = 5 m/s

Q: if you took a bar magnet and cut it in half, then cut each of those halves in half again, how many…

A: If we cut a magnet into two parts the new magnets that is each piece will again have two poles…

Q: Which of the following are accurate statements about permanent magnets and magnetic fields? O…

A: A bar magnet is a permanent magnet which has two poles at its ends, one north and the other south…

Q: A high-speed electron having a mass of 9 × 10−31?? is moving at right angle to 0.75-T magnetic field…

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Q: What current is needed to generate the magnetic field strength of 5.0 x 10-5 T at a point 2.0 cm…

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Q: A stationary positive charge +Q is located in a magnetic field B, which is directed toward the right…

A: Given: The positive charge is +Q. The magnetic field is B.

Q: An airliner is cruising in level flight over Alaska, where the Earth’s magnetic field has a large…

A: As given that the earth magnetic field has a downward component, so the plane tiles north and from…

Q: A neutral point is a point at which the horizontal component of Earth field and the field of the bar…

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Q: Why magnetic field strength increases when you put a ferromagnetic material inside a solenoid…

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Q: An electron moves straight upward away from the ground in a region where the Earth's magnetic field…

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Q: Why the poles of a bar magnet lie at its ends?

A: As earth possess  its own weak magnetic field, because earth core act as a magnetic core, So any…

Q: Why will a magnet attract an ordinary nail or paper clip but not a wooden pencil?

A: A magnet can only attract the objects which are made of ferromagnetic material. a magnet attract an…

Q: The minimum attraction will be at of the magnet. O a. both poles of the magnet O b. only north pole…

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Q: Will a magnet attract any metallic object, or only those made of iron? Why is this so? Explain in…

A: A magnet attracts metallic objects

Q: The horizontal component of the earth’s magnetic field at a certain place is 3.0 ×10-5 T and the…

A: Given, Magnetic field (B)= 3 x 10-5 T and the direction of the field is from the geographic south to…

Q: A student asserted that if a permanent magnet is dropped down a vertical copper pipe, it eventually…

A: when a bar magnet is dropped down a vertical copper pipe due to field from magnet there will be a…

Q: A magnetic field with a strength of 120G extends horizontally from west to east. A wire with a…

A: Force on a wire of length l and current i  F=ilBsin∅

Q: A 1.0 m length of wire carrying 4.1 A of current toward the south is oriented horizontally. At that…

A: Magnetic force formula

Q: In what direction is the force of an electron if that electron is moving east through a magnetic…

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Q: Why does a piece of iron in a current- carrying loop increases the magnetic field strength?

A: Magnetic field has a influence over the current in electric circuit, and the flow rate in the…

Q: Find the maximum speed a charged body can acquire while sliding down an inclined plane in an…

A: when a charged particle moves with a velocity v in a uniform magnetic filed than a force is exerted…

Q: Suppose that a uniform magnetic field points out of this sheet of paper. If a positively charged…

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Q: A proton, traveling with a velocity of 3.1 x 10ºm/s due east, experiences a magnetic force that has…

A:

Q: Near the surface of the earth, a magnet is made to levitate above another magnet, which is on a…

A:

Q: Will a magnet attract any metallic object, such as those madeof aluminum or copper? (Try it and…

A:

Q: A 1 m wire carries a current of 30 The wire experiences a force of 6.0 N in the presence of a…

A:

Q: A 10-turn circular coil of radius 20mm carries a current of 0.50 A. Find the magnitude of the…

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Q: Mention all the different ways to reduce the magnetic force on a moving charge q to the half of its…

A: The force on a charged particle moving in the magnetic field is  F = q v B sin A where, A is the…

Q: How would you orient two long, straight, current-carrying wires so that there is no net magnetic…

A: The direction of magnetic field due to a long straight current carrying wire is given by right hand…

Q: A neutral point is a point at which the horizontal component of Earth field and the field of the bar…

A: A neutral point is a point at which the resultant magnetic field is zero. In general the neutral…

Q: What is the speed of a supersonic aircraft with a 17.0 m wingspan, if it experiences a 1.80 V Hall…

A: Given, Hall Voltage (E)=1.80V Length (L)=17m Magnetic field (B)=8.70×10^-5 tesla Speed=?

Q: Do you think it is possible to instead use magnetic field from an external source to generate…

A: In order to produce the current in the circuit we need tochange magnetic flux through the circuit.…

Q: An electron traveling from the sun as part of the solar windstrikes the earth’s magnetosphere at…

A: Given data: Latitude, θ=800 Magnetic field strength, B=15 mT=15×10-3T Speed of electron, u=400…

Q: A negatively charged particle is moving to the right, directly above a wire having a current owing…

A: Let v denotes the charge speed, -Q denotes the charge, B denotes the magnetic field due to the wire,…

Q: A 45-m length of wire is stretched horizontally between two vertical posts. The wire carries a…

A: Given data: Length of the wire, L=45 m Current in the wire, I=75 A Force experienced by the wire,…

Q: The magnetic field in the interstellar space of our galaxy has a magnitude of about 10-10 T. How…

A: The expression for the required stored energy in a cube of volume is,