Amatrol Inductance and Capacitance exam 2024 latest update(fully solved&updated)dowload to pass

What is the name of the invisible force that is created around the wire when electrons flow through a wire? Magnetic field What is electromagnetism? The creation of a magnetic field by the flow of electric current is referred to as electromagnetism. What does winding the conductor into a coil cause? Winding the conductor into a coil causes the magnetic field to become stronger. The ____________ of the field increases as the number of windings (turns) increases. Strength Does coiling a conductor affect the current that flows though the conductor? Yes, coiling a conductor affects the current that flows through the conductor. What are electromagnets? Electromagnets are devices that use the force created by an electromagnetic field to produce some type of output, usually mechanical motion. What are four common electromagnetic devices? Solenoid Motor Relays Buzzer What is a solenoid and how is the motion produced? A solenoid is an electromagnetic device that is used most often to produce linear motion. This motion is created by an armature (or plunger) that is inserted inside the coil. When a magnetic field is created, the armature moves. How does a motor move? A motor is an electromagnetic device that produces rotary motion. The motor tranters the motion through a round shaft that rotates inside the magnetic field. How does a buzzer make its sound? A buzzer is an electromagnetic device that vibrates the armature to produce a buzzing sound. What is a relay? A relay is an electromagnetic device that is basically an electrically controlled switch. What are the parts of a relay? There are 2 parts of a relay: A coil and one or more sets of switch contacts. If a coil had a turn added to it, its magnetic field would be ____________. stronger The invisible force around a wire that is created when current flows through it is called a _______________________. Magnetic field A ________________ is an electromagnetic device that is used most often to produce linear motion. Solenoid A relay consists of switch contacts and a _________________. coil A ___________ is basically an electrically-controlled switch. relay What is inductance a characteristic of? Inductance is a characteristic of electromagnetic devices that opposes any change in current flow. What unit is used to measure inductance? Inductance is measured in the unit Henrys. How is an inductor created? An inductor is created by winding an electrical wire around a coil. What is the purpose of an inductor? The purpose of an inductor is to resist change is current flow. What is another name used to refer to inductors? Inductors are also referred to as chokes. What is the reason an inductor resists changes in current flow? The reason an inductor resists changes in current flow is that whenever current through an inductor is changing, a voltage is induced in the inductor. The faster the current is changing, the __________________ of the induced voltage. larger the magnitude of Induced voltage _____________ the source voltage that is creating the current flow. opposes What is induced voltage also referred to as? Counter emf or back emf. What is the only time that induced voltage is present? Induced voltage is only present when the current is changing. Each level of current flow creates ____________ around the conductor. an electromagnetic field The ___________ of the field is proportional to that particular level of current. Strengh What happens to induced voltage when current is increasing? When current is increasing, the induced voltage slows the current change and the electromagnetic field builds. What happens to induced voltage when current is decreasing? When current is decreasing, the induced voltage tries to keep current constant by using the energy stored in the electromagnetic field while it is collapsing. True or false: Inductors have different effects in DC and AC circuits True. Inductors have different effects in AC and DC circuits. When does inductance affect a DC circuit? Inductance only affects a DC circuit when the current is first turned on, turned off, or when there's a change in the load resistance. When does current change in a DC circuit? Current only changes in a DC circuit when the current is first turned on, turned off, or there's a change in load resistance. What happens when voltage is first applied to a DC circuit? When voltage is first applied to the DC circuit, the rising current creates an opposing (induced) voltage in the inductor that slows the increase in current. How does the opposing effect last in a DC circuit? The opposing effect lasts only while the current is rising to its steady state value. What happens when the current has stabilized in a DC circuit? After the current has stabilized, the current though the inductor is determined solely by the DC resistance of the inductor. An_____________ exists around the inductor, the ___________ of which is proportional to the steady state current level. electromagnetic field/ strength