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You Are On Multi Choice Question Bank SET 1053

52651. Inductance is:





52652. Current will cause a magnetic field in a conductor as follows:





52653. What is the total inductance, assuming no mutual inductance?





52654. During a current change, the ability of a conductor to produce counter emf within itself is called:





52655. If the switch is moved to position 1 in the given circuit, how long will it take for the current to reach its maximum value?





52656. When a transformer secondary lead has been connected to a middle loop that is not an end connector, it is called a:





52657. A 24 V peak source is connected across a 900 H inductor. If the frequency of the source is 22 kHz, what is the reactive power?





52658. What is the permeability of machine steel?





52659. What will happen when an inductor's magnetic field collapses?





52660. With a square wave input, an RL differentiator circuit with an output across the inductor will produce what type of waveform?





52661. How long until the current is at a maximum?





52662. Find VR and VL.





52663. If 360 Vac is the output of a 300-turn secondary winding, what is the input voltage when the primary winding has 150 turns?





52664. When a magnet enters a coil and a voltage is induced, the process is known as:





52665. What term is used to describe the action of magnetic flux from one circuit that cuts across the conductors of another circuit?





52666. Reactance in an inductive circuit will:





52667. A turns ratio of 5 for a transformer implies:





52668. A practical inductor





52669. When current in an inductor starts to change, it cannot react instantly due to:





52670. What is the approximate time for a complete decay of 400 mA of inductor current, when R = 10 ohms and L = 20 H?





52671. A utility pole transformer used to supply a residential customer with two phases uses:





52672. What is the inductive reactance?





52673. When a coil collapses the induced circuit current will:





52674. When a rate of one ampere per second causes an induced voltage of one volt, the unit of measure is





52675. If you wanted to decrease the inductance of a coil, you might increase the:





52676. The output phase for a transformer is:





52677. Opposition to current flow without the dissipation of energy is called:





52678. With 100 Vac applied to the primary of a transformer so that it draws 500 mA, what will be the 300 Vac secondary current?





52679. Which coil would be used as a step-up transformer primary if coil number 1 has 100 more turns than coil number 2?





52680. Find IR and IL.





52681. When the transformer secondary is not loaded:





52682. What is the current rise after 2 time constants if Vs = 12 V dc, R = 60 , and the inductor is rated at 24 mH?





52683. What is the total inductance of a 5 H and a 100 mH coil connected in parallel?





52684. A transformer is used:





52685. Which of the following is NOT one of the three major types of fixed inductor?





52686. What is the impedance of a 1 kHz series RL circuit when R and XL are both 1000 ohms?





52687. What is remanence?





52688. When an electromagnet reaches maximum strength, it is considered to be:





52689. You could decrease the time constant of an RL circuit by





52690. Indication of transformer primary and secondary voltage relationships is accomplished by:





52691. As a generator armature passes the 270 degree point, the induced voltage is:





52692. A value of "ten to the eighth power magnetic lines of force" is for the term:





52693. A change of one ampere per second in an inductor that induces a voltage of one volt is considered as which unit value?





52694. What is the name of the part inside a relay that is moved by the action of the electromagnet?





52695. If the primary of a 4:1 turns transformer dissipates 5 W, what is the secondary power?





52696. The unit of flux density is:





52697. When used as a filter, an inductor is





52698. A loaded transformer will achieve mutual induction when:





52699. Which transformer turns ratio is needed to match two 16-ohm parallel devices to an output of 22.2 ohms?





52700. A transformer will have:





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