10. Using the electromagnetic theories, explain how an electric bell works. switch spring soft-iron armature contact adjusting screw contact S soft-iron core
Q: Which of the Following can be a source of EMF? A. battery B. Wind generator C. Power Lines D.…
A: Option (D) Is correct. An electromotive force is an energy thatcan cause current to flow in an…
Q: The cause of the alternating current in the secondary coil of a transformer is an emf produced by…
A: Whenever a source of varying voltage is applied at the primary of a transformer then a varying…
Q: The time taken by the alternating voltage function in reaching the peak value from zero is 2.7x103…
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Q: 4. With what force must the grey bar be pushed to the right in order to maintain a constant 0.50m/s…
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Q: Which of the following is NOT and application of electromagnetic induction? a. anti-theft tags O b.…
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Q: What is the name of the generator used as a Booster in the Transmission line? a. Series Generator…
A: What is the name of the generator used as a Booster in the Transmission line? Option a Series…
Q: Two coils are placed close together in a physics lab to demonstrate Faraday’s law of induction. A…
A:
Q: Magnitude and direction of an induced emf may be obtained by applying a. Faraday's law, b. Ampere's…
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Q: Which one of the following devices makes use of this principle, “current is induced in a coil when…
A: According to the Faraday's law of electromagnetic induction, when the magnetic flux linked with the…
Q: Electromagnetic induction describes the ____________ Select one: a. effect of heat on a magnetic…
A: Electric flux is defined as the product of the Electric field and the area specified. Similarly,…
Q: 15. If the direction of the current in a conductor is downward, what is the direction of the…
A: We need to examine the direction of magnetic field due to the conductor at a specified position.
Q: NOT and application of electromagnetic induction
A: Out of all option , all devices make use of electric and magnetic field but velocity selector does…
Q: What circuit element(s) will oppose the change in current in the circuit? a. inductor only b.…
A: According to Lenz's law the polarity of the voltage accross the inductor in such a direction so that…
Q: A series circuit with a single loop consists ofa switch a 350- ohm resistor, a 6000 - µF capacitor,…
A: Resistance ( R ) = 350 ohm Capacitor ( C ) = 6000 µF = 6 * 10 -3 F Voltage ( V ) = 20 V
Q: What law considered as a working principle of the most of the electrical motors, generators,…
A: electrical motors and generators are the devices which are used to mainly convert electrical energy…
Q: What is the type of core material of the transformer? a. Silicon steel b. Iron c. Copper d.…
A:
Q: ‘X’ states that the direction of induced current in a circuit is such that it opposes the cause or…
A: B
Q: Q11. What resistance should be added in series with a 3.0-H inductor to complete an LR circuit with…
A:
Q: Is used to determine the direction of rotation of a current-carrying coil 1. Kirchhoff's laws…
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Q: A- Mechanical Able to travel in a vacuum - Electromagnetic C-Both A- Mechanical - Electromagnetic C-…
A: (22) Mechanical waves rely on particle interaction in order to transport their energy, they cannot…
Q: The torque on a solenoid in a magnetic field is not a function of its ____. A. loop area B. number…
A: torque = force x radius force in magnetic field = i*l*B i = current l…
Q: 2. If the current in the secondary is equal to the current in the primary, the transformer is a step…
A: The primary current is equal to the product of the secondary voltage and secondary current divided…
Q: 9. What is the value of the peak voltage for 120 V AC power? What is the peak power consumption rate…
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Q: Calculate the size (in T) of the magnetic field 11 m below a high voltage power line. The line…
A: Radius ( r ) = 11 m Voltage ( V ) = 200000 V Power ( P ) = 550 MW
Q: Why Hysteresis Losses of DC motor is constant? a. It does not depends on load current b. none…
A: Why Hysteresis Losses of DC motor is constant?a. It does not depends on load current b. none of the…
Q: The device used to convert electrical energy to mechanical energy a. Inductor O b. Motor O c.…
A: Inductor a device which stored electrical current Capacitor a device which stored charge Optical…
Q: Q8) Draw the high frequency model of JFET
A:
Q: 34. The inductance of a material refers to: a. Ability of the material to store magnetic field.…
A: The inductance of a material is the tendency of a that conductor to oppose charge or current as…
Q: Imagine that you go to leave a room with an overhead light. The light is on. You move the wall…
A: Let a light is working in a room. Once a person is about to leave the room, he / she tries to…
Q: The device used to convert electrical energy to mechanical energy O a. Optical fiber O b. Inductor…
A: An optical fibre transmits an electric signal into a light signal. Inductors convert electrical…
Q: What is the name of the part of the DC machine that is made up of cast steel lamination? a. Brush…
A: Solution
Q: 4. What is the EMF induced when the magnetic field changes from 2.5 T to 0.9 T in 12 seconds with a…
A:
Q: Ohm's law is not applicable to: a) DC circuits b) high currets c) small resistors d) semi-conductors…
A: Given Ohm's law is not applicable for ___
Q: 26. Which of the following quantities increases at the secondary coil of an idea step-down…
A: The power output in the step-down transfer is: P=VII=PVI α 1V
Q: A large water main is 2.50 m in diameter and the average water velocity is 4.90 m/s. Find the Hall…
A: Average water velocity (v) = 4.90 msDiameter (d) = 2.50 m Magnetic field (B) = 4.90×10-5 T
Q: Which of the following parameter is directly proportional to capacitive reactance? a.…
A: Capacitive reactance is given by XC = 12πfC = 1ωC Where f = frequency w = angular frequency…
Q: 129. The time period of an alternating quantity is 0.02 second. Its frequency will be A.25 Hz B.50…
A: Concept: The number of waves that pass a certain spot in a second is known as frequency. Hertz is…
Q: Conductance Condu ictal се
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Q: What instrument can detect the distance from a damaged wire?
A: cable fault meter PCE-186
Q: 3. The unit of inductance is a. Ohms b. Henry C. Farad d. Tesla
A: I ductace is ratio of induced voltage to the rate of change of current.It is represented by letter…
Q: The daigram shows a coil connected to a voltage source. When the switch is closed, current flows…
A: Given that a coil is connected to a voltage source. When the switch is closed, current flows through…
Q: Which parameter of a transmission line describes its ability to store electrical energy in the form…
A:
Q: HOMEWORK PROBLEMS FOR CHAPTER 2, 1. The value of a DC voltage or current varies over a period of…
A:
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