A video game console requires 6 V to operate correctly. A transformer allows the device to be powered from a 120-V outlet. If the primary has 500 turns, show that the secondary should have 25 turns.

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: A transformer can do all of the following except: A) step­-up a/c voltage B) step­-up a/c current C)…

A: The transformer is a device which is used in AC power transmission of electric energy. By using the…

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

A: The electric motor and generator both works on the principle of the electrical generation. The…

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: 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: Your company’s main competitor has built an extremely efficient transformer and is trying to market…

A: The low of conservation of energy states that energy can neither be created, nor be destroyed. It…

Q: What is the Law of Magnetic Poles?

A:

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: State Faraday’s Law of Induction.

A: Faraday's law of induction has two parts, The first law describes the induction of emf in a…

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: In a step down transformer, how does the input current compare with the output current?

A: In a step down transformer, the output current is higher than the input current. Because the number…

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

A:

Q: What are the Properties of Alternating Current?

A: The properties of alternating current are: Frequency is denoted by f and is defined as the number…

Q: oltage of 120 volts and a secondary voltage of 18 volts. The primary excitation current is 0.25 amp.…

A: Given;- A transformer has a primary voltage of Vprimary =  120 volts  A secondary voltage of…

Q: Why is it important that the core of a transformer pass through both coils?

A: A transformer is a device which is used to convert the high voltages into low and vice versa for ac…

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: Why is the iron core of a transformer made laminated instead of being in one solid piece?

A: In an actual transformer, small energy losses occur and the efficiency gets reduce. The laminated…

Q: The primary of a transformer connected to 120 V has 10 turns. The secondary has 100 turns. Show that…

A: Given:   Input voltage, Vinput = 120 V  number of turns in primary coil, n1 = 10  number of turns in…

Q: You have a transformer with 709 coils in the primary and an input voltage of 140 V. If you want an…

A: Given: The number of turns in the primary winding is 709. The input voltage is 140 V. The output…

Q: Name the transformer used in the (a) power generating station (b) power sub station. State the…

A: (a).The transformer used in the power generating station is step-up transformer of high voltage…

Q: Name two kinds of energy losses in a transformer. How are they minimized?

A: The two types of major losses in transformers are:Eddy currents.Hysteresis loss.

Q: A device used to convert, electrical energy into mechanical energy is (a) generator (b) motor (c)…

A:

Q: The transformer works on the principle of We construct and understand the working of the two types…

A:

Q: A Transformer having 1200 Primary turns connected to a 252 V a.c. supply. For a secondary Voltage of…

A: The transformer is a  device that transfers electric energy from one AC circuit to one or more…

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: How does the power input to an efficient transformer compare with the power output?

A: The efficiency of a transformer is defined as the ratio of output power to the given input power.

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: What are step up and step down transformers?

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

Q: How does the current in the secondary of a transformer compare to the current in the primary if the…

A: The relation is given by,

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: Solenoid and Toroid require Resistors Current carrying wires Motor None of these

A: Solenoid and Toroid requires current carring wires.

Q: On which principle a transformer works

A: Transfer is a device which is used to step up or step down the voltage.

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

A:

Q: A transformer consists of a 781-turn primary coil and a 6809-turn secondary coil. If the current in…

A: Find the primary current flows in the transformer. N1N2=I2I1N2N1=I1I2I1=I2N2N1I1=2.78 A6809781=24.2…

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

A:

Q: In this lab, you learned that if a coil is connected to a DC source, the moment we turn on the…

A: According to the Faraday’s law of electromagnetic induction the magnitude of the induced emf in a…