. A laptop computer’s charger unit converts 120 V from awall power outlet to the lower voltage required by thelaptop. Inside the charger’s plastic case is a diode or rectifier(discussed in Chapter 29) that changes ac to dc plus a(a) battery.(b) motor.(c) generator.(d) transformer.(e) transmission line.

Q: How is electromagnetic induction used when electrical signals needs to be transmitted across a…

A: Electromagnetic induction is an induction of an electromotive force induced by motion of a conductor…

Q: Does a battery produce dc or ac? Does the generator at a power station produce dc or ac?

A: A battery produces a DC as its terminal always have the same sign.

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 does it mean to say that a certain current is 60 Hz?

A:

Q: What does changing magnetic field induce?

A: A change in magnetic field induces a current in a conductor.

Q: What is basic difference between a generator and an electric motor?

A: The key difference between the two is that the electric motor is an electrical system that…

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: Choose the BEST answer to the following: A step-up transformer in an electrical circuit can step up…

A: A step-up transformer is a static device, which is used in electric circuits to increase the voltage…

Q: It is an electronic device that transforms an alternating current into direct current.

A: A Rectifier is a device that converts alternating current into direct current. The Rectifier is made…

Q: Discuss the statement " In case of a transformer whatever is gained is voltage is lost in current".

A: Transformer is a device which works on the principle of electromagnetic induction. As we apply…

Q: What important discovery did physicists Michael Faraday and Joseph Henry make?

A: Given:  Michael Faraday and Joseph Henry

Q: How does the current in the secondary of a transformer compare with the current in the primary when…

A: Given: secondary volatge is twice the primary volatge Vs = 2Vp

Q: What contributions did Thomas Edison make that ultimately changed the status quo?

A:

Q: How electromagnetic induction works in Generator? In Induction Cooker? In Magnetic flow meter?

A:

Q: what does magnetic flux per unit area indicate ?

A: The magnetic flux is defined as it is the product of magnetic field and area. ∅=BA Now, the magnetic…

Q: Who discovered electromagnetic induction?

A: Electromagnetic induction is the production of electromotive force across an electrical conductor in…

Q: A step-up transformer increases voltage, or potential energy per unit charge. Howis this possible…

A: A transformer with more secondary windings than primary winding, so that it can increase voltage…

Q: describe some of the differences between a motor and an AC generator, and discuss how each use the…

A: The differences in between motor and generator are enlisted as follows, Motor Alternate Current…

Q: What is cenre-tap transformer?

A: The centre-tap transformer is having a small different from the usual transformer in which the…

Q: You are riding in a train, gazing into the distance through its window. As close objects streak by,…

A: In one second, the fluorescent light blinks on and off 120 times since it produces light from an…

Q: What is basic similarity between a generator and an electric motor?

A: A generator converts mechanical energy into electrical energy, and electric motor converts…

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: An ideal transformer has 50 turns in its primary and 250 turns in its secondary. 12-V ac is…

A:

Q: Does a generator slowly lose its residual magnetism with time? Yes/No and why

A: A generator is a device which converts mechanical energy into electrical energy.

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 are step up and step down transformers?

A: Transformers are the electrical devices which works on the principle of electromagnetic induction.…

Q: Name the device used to protect the electric circuits from overloading and short circuits. On what…

A: In order to protect an electric circuit from excessive electric current, fuse is an electrical…

Q: How is the working of an electric bell affected ,if alternating current be used instead of direct…

A: When the switch is ON , the electric current will flows through the coil, and iron core acts as an…

Q: What is electromagnetic induction?

A: the phenomenon of electromagnetic induction was discovered by Michael Faraday in 1830's. the…

Q: Your friend says that if you crank the shaft of a dc motor manually, the motor becomes a dc…

A: Any coil of wire spinning in a magnetic field which cuts through the magnetic field is called a…

Q: A transformer for a laptop computer converts a 120-V input to a 24-V output. Show that the primary…

A:

Q: wo coils are placed close together in a physics lab to demonstrate Faraday's law of induction. A…

A: Initial current ,I1=4.90A final current, I2=0A time required, dt=1.4*10-3s so di/dt…

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

A: