A conductor will have an induced current or voltage when there is a. Relative motion between the wire and magnetic field b. A stationary magnetic field c. A stationary conductor d. a time varying magnetic field  Multiple answers is allowed

Q: 15. How much work is done by a magnetic field as a charged particle circulates through it? A. It…

A: Let the charge = q Let the speed of the charged particle = v Let the magnetic field = B

Q: 2. Examine the following diagram of a wire near the poles of a magnet. a. Describe what will happen…

A: We need to inspect the given diagram.

Q: Which of the following can induce an emf in a loop of wire placed in a region where a magnetic field…

A: According to Faraday's second law Induced emf = - rate of change of magnetic flux

Q: 3. Inside a solenoid the magnetic field A. is zero B. is uniform C. increases with distance from the…

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Q: Flux: A flat coil is in a uniform magnetic field. The magnetic flux through the coil is greatest…

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Q: What do you end up with if you cut a magnet in half? A. one north-pole piece and one south-pole…

A: We cut a magnet in two pieces

Q: When viewed from above, the current is moving anticlockwise in circular loop of wire. What is the…

A: The upper face of the circular loop south pole develop on the upper face of the…

Q: 3. A wire is moving on frictionless rails in a uniform magnetic field, as shown to the right. The…

A: We have a wire of length L=5 cm=0.05 m which is moving along a rail experiencing a magnetic field of…

Q: According to Lenz’s law, a decreasing magnetic flux will result to an induced current that produces…

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Q: 1. When a magnet is passed through a conducting wire coil, the changing magnetic flux will induce A.…

A: Faraday states that, When a magnet is moved through a coil of wire, the magnetic field will change…

Q: A magnet is moving toward a solenoid and a potential difference is induced between the two ends of…

A: a) if the speed of magnet is increased induced emf will increase because rate of change of flux will…

Q: What would change when the orientation of the magnet is reversed?  I. Direction of the induced…

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Q: When is the circuit purely magnetic? A. When fully charged B. When capacitor is fully…

A: The circuit consists of a capacitor and an inductor.Write the expression for the energy stored in…

Q: 11. Which statement is true? A. The magnetic field created by a single current loop is weakest…

A: As per guidelines we are suppose to do only one question from multiple question and three subpart…

Q: Based on the figure below, what will happen to the wire? electron flow

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Q: Q14. Magnetic field inside a solenoid is .  A. Strong at N pole and weak at S pole B. Strong at S…

A: The magnetic field within the solenoid is uniform and parallel to the axis of the solenoid.

Q: I. Direction of the induced magnetic field II. Magnitude of the induced EMF III. Direction of the…

A: Say we have a circular loop and then a magnet with the north pole is brought towards the loop. This…

Q: We can change the direction of rotation of a DC motor by changing the polarity of the electric…

A: The direction of electromagnetic torque developed by armature of the DC motor depends upon the…

Q: The induced emf in a coil as a magnet is moved relative to the coil can be increased:   a. No! This…

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Q: What happens to the flow of current when the south pole of a magnet is moving towards a coil of wire…

A: What happens to the flow of current when the south pole of a magnet is moving towards a coil of wire…

Q: 3. You have a loop of wire as shown which is only free to rotate about the y axis. The magnetic…

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Q: The magnetic flux of a coil will be positive maximum when, a. magnetic field is parallel to the…

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Q: 1. In a charging capacitor, which of the following phenomenon is considered in Ampere's law a.…

A: 1. In a charging capacitor, displacement current is considered in Ampere's law. So option (d) is…

Q: In a bar magnet, the force of attraction is minimum (approximately no force) O a. at both ends of a…

A: We need to comment on where the force of attraction due to bar magnet is minimum.

Q: 4. Two parallel wires carry the same current and are at a distance r from each other. a. They repel…

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Q: Which of the following statements best describes Oersted’s Principle ? a. A current carrying…

A: Oersted's principle states that when a steady electric current passes through a conducting wire it…

Q: The magnetic flux of a coil will be positive maximum when, O a. magnetic field is antiparallel to…

A: Magnetic flux is given by the formula : flux (ϕ) = B×A×Cosθwhere B is the strength of magnetic field…

Q: he bar magnet is flipped over and the south pole is

A: 1. When the south pole brought near the steel ball , the ball is still attracted towards the magenet…

Q: Which of the following statements is TRUE when the magnet is dropped inside the solenoid? A. The…

A: When the magnet is dropped inside a solenoid, magnetic flux increases through the solenoid. It keeps…

Q: Two identical coils of wire are connected to different power supplies. The current in coil A is 0.50…

A: At the same distances, the magnetic fields due to their current-carrying coils are calculated. Write…

Q: How many turns of a coil are necessary to produce a 0.25-T magnetic field inside a 50-cm-long…

A: Given data:  Magnetic field (B) = 0.25 T Length (L) = 50 cm = 0.50 m Current (I) = 20 A Required:…

Q: Which of these is not an example of the relationship between electricity and magnetism? Select one:…

A: From the Faraday’s law statement, a changing magnetic field produces an electric field.From the…

Q: When a magnet is passed through a conducting wire coil, the changing magnetic flux will induce

A: Answer  A    an electromagnetic force in the coil.

Q: You have the apparatus shown in Figure P21.13. A circular metal plate swings past the north pole of…

A: Given data: A circular metal plate swings past the north pole of a permanent magnet. The metal is…

Q: Two coils are connected to different power supplies. Each coil carries a current of 0.15 A. Coil A…

A: According to Ampere's current law, ∫B→.dl→=μ0I If current associated with each turn of coil is I.…

Q: What is the difference between a conductor and an insulator? a. An insulator allows electricity to…

A: 1) A conductor is a material which allows electricity to flow through it easily and an insulator…

Q: In generating electricity, a magnet, surrounded by wires connected to the electrical grid, will be…

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Q: 20. The image shows a non-constant B-field driving a counter clockwise current in a loop of wire…

A: We will first write expression of Faraday's law in integral form. We then use the given magnetic…

Q: Magnetic field lines a. leave the north pole of a magnet and enter the north pole of another…

A: Outside the magnet magnetic lines moves from north pole to south pole And inside magnet magnetic…

Q: When you push the South end of a magnet into a solenoid, it creates a negative voltage. If you push…

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Q: According to Gauss' law for magnetism, the second equation of Maxwell's Equations shown below,…

A: Gauss law of magnetism states that the divergence of the magnetic field vector is zero or is…