Two separate but similar coils of wire are mounted close to each other, as shown. The first coil is connected to a battery and has a direct current flowing through it. The second coil is connected to a galvanometer. How does the galvanometer respond when the switch in the first circuit is closed? After being closed when the current is steady? When the switch is opened?

Q: What happens when you thrust the north pole of the magnet into the coil in the opposite direction?

A: Whenever there is a relative motion between bar magnet and coil then an current is induced called…

Q: An electric fan continues in its motion even after the switch is put off, why?

A: Newton’s first law states that the body at rest remains at rest, or in motion, remains in motion at…

Q: As shown in the figure, calculate the magnetic field that will be formed at the point A of the…

A: given: radius, r =  5 cm  current, i = 10 A

Q: How does the frequency of induced voltage relate to how frequently a magnet is plunged in and out of…

A: The frequency of the induced voltage is the same as the frequency of the varying magnetic field…

Q: Two separate but similar coils of wire are mounted close to each other, as shown. The first coil is…

A: When the switch is closed current starts flowing through the primary.Which results in a change in…

Q: What determines the strength of the magnetic field that is produced around a single conductor?

A: Objective: To conclude what determines the strength of the magnetic field that is produced around a…

Q: What happens in the secondary coil of a transformer?

A: secondary coil

Q: How a step up transformer works?

A: The transformer is a static electrical device that is used in many electronic devices like inverters…

Q: What happens to a magnet when it comes into a larger magnetic field?

A: Answer Magnets are drawn along the magnetic field gradient. If opposite poles of two seperate…

Q: What is the nature of relationship between force and magnetic field?

A: In this question we have to explain the relationship between force and magnetic field.

Q: A copper ring and a wooden ring of the same dimensions are placed in magnetic fields so that there…

A: According to Faraday's law of electromagnetic induction, whenever there is a change in magnetic flux…

Q: A magnet is suspended from a spring so that it can move freely inside a coil. The coil is Connected…

A: Concept Used : According to faradays law when magnetic flux passing through a conducting coil…

Q: A tipped domino sends a pulse along a row of standing dominoes. Is this a good analogy for the way…

A: Electrical currents is that the current is propagated through the conducting wires by electrons…

Q: A small permanent magnet is suspended by a spring balance above the center of a circular coil of…

A:

Q: what will happen to the current directions if the polarity of the nine-volt battery is reversed?

A:

Q: Two nearby current loops are oriented as shown. Loop 1 is fixed in place; loop 2 is free to rotate.…

A: The current in loop 1 generates a magnetic field. Field of the loop 1 will be in upward direction as…

Q: If you place a metal ring in a region in which a magnetic field is rapidly alternating, the ring may…

A: Given: A metal ring

Q: How does the number of coils affect the amount of current generated?

A:

Q: How often is current reversed in the loops of an electric motor?

A: Explanation:

Q: How does a motor compare with a generator? Briefly describe what they do and how they are different.

A: In motor current is not generated,here current is flown through a current carrying loop by external…

Q: How is the polarity of the magnet and the polarity of the voltage related?

A: Polarity is defined as the separation of electric charge that causes the formation of an electric…

Q: You put a metal ring into a region where the magnetic field is changing quickly. You notice that the…

A: Basic information The magnetic field is the area around the magnet where the magnetic force can be…

Q: What happens to the magnetic field produced by the electromagnet if some parts of the wire windings…

A: The current carrying wire produce magnetic field around it in circular loop.

Q: The attraction of two wires with current going in the same direction tells us what about their…

A:

Q: What is the purpose of a switch?

A: Switch is an electrical component by which we can physically connect or disconnect the conducting…

Q: What is the current in the second wire? are the two current in the same direction or in opposite…

A: (a) Force per unit length between the two wires

Q: What happens when a loop of wire turns between two permanent magnets in a generator?

A: We know that the magnets have the magnetic field in it and the loop of wires have resistance.

Q: Bar magnets are moved into the wire coils in identical quick fashion. Voltage induced in each coil…

A:

Q: What is the source of the energy of the induced current when a bar of magnet is inserted into a coil…

A: Current is induced when a bar magnet is inserted into a coil of wire. This is due to the magnetic…

Q: What happens to the magnetic force produced by the electromagnet if you reverse the terminal…

A: The two poles of the permanent magnet remain the same, but the poles of the electromagnet reverse…

Q: When the switch is closed in the circuit shown in the figure, the wire between the poles of the…

A: The force on the current carrying conductor placed in a magnetic field is F=IL×B When switch is…

Q: 16. As shown in the figure, two parallel wires carry a current I in opposite directions, and this…

A: Using Lenz's law: Induced current in the loop will be such that it will resist the change in…

Q: A wire bent into circle, carries a current in an anticlockwise direction. What polarity does this…

A: Given that the wire carries current in the anticlockwise direction.

Q: Where is the magnetic field strongest around a magnet?

A: A bar magnet with its magnetic field is shown below:

Q: Why does the light come on so quickly when switch is thrown?

A:

Q: What causes the rotation in electric motors?

A: Rotation in motor is due to torque and torque is due to magnetic force.  Magnetic force is given by,…

Q: why the ammeter moves as the copper wire is placed in and out of the magnet?

A: SOlution: To discuss why there is current when the magnet moves in and out of the copper wire

Magnetic Field Of Coaxial Cable

The word coaxial means same axis. So for a long straight cable to be coaxial, it must have concentric cylindrical shaped conductor around it. Coaxial cable (popularly called ‘coax’) has various applications ranging from current conductors to radiofrequency signal transmitters. This cable has lower emission losses and provides protection from electromagnetic interference which allows signals with less power to transmit over longer distances.For example, currents produced in the pickup of a stereo turntable generally travel to the amplifier through a coaxial cable.The self-inductance of a coaxial cable is another important characteristic, because it influences the propagation of electrical signals in the cable.