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**Description :** AC circuits develop resistance, inductance, and capacitance. The inductive reactance of a circuit is expressed in _____________. A. ohms B. mhos C. henrys D. farads

**Last Answer :** Answer: A

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**Description :** AC circuits possess characteristics of resistance, inductance, and capacitance. The capacitive reactance of a circuit is expressed in _____________. A. ohms B. mhos C. henrys D. farads

**Last Answer :** Answer: A

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**Description :** Is ohms law verified for the open circuits?

**Last Answer :** For an open circuit, you basically have an infinite resistance,and zero current. This can be considered a special case of Ohm'slaw.

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**Description :** 27] In a transformer, the leakage flux of each winding is proportional to the current in that winding because A. Ohm's law applies to magnetic circuits B. Leakage paths do no saturate C. the two windings are electrically isolated D. mutual flux is confined to the core

**Last Answer :** B. Leakage path do not saturate

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**Description :** why ohm's law is not applicable for ac circuit?

**Last Answer :** We can use Ohm's law for AC circuit if circuit consists of linear components and devices.

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**Description :** If reading AC current with the illustrated device and unsure of the range as a precaution , the first step should be to _________. EL-0047 A. secure power and test for voltage B. disconnect the ... resistance and use Ohm's law to calculate current D. unable to safely measure current with the device

**Last Answer :** Answer: A

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**Description :** What is ohm’s law for AC circuit?

**Last Answer :** I = V/Z amps. Z = V/I ohms. V = I * Z volts.

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**Description :** Alternating current circuits develop resistance, inductance, and capacitance. The capacitance of individual capacitors is expressed in _____________. A. ohms B. mhos C. henrys D. farads

**Last Answer :** Answer: D

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**Description :** Alternating current circuits develop resistance, inductance and capacitance. The inductance of a coil is expressed in _____________. A. ohms B. mhos C. henrys D. farads

**Last Answer :** Answer: C

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**Description :** When troubleshooting most electronic circuits, 'loading effect' can be minimized by using a voltmeter with a/an ___________________. A. input impedance much greater than the impedance across which the voltage ... sensitivity of less than 1000 ohms/volt D. sensitivity of more than 1000 volts/ohm

**Last Answer :** Answer: A

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**Description :** State different types of power in ac circuits. Write the expression and units for the same. Draw the power triangle.

**Last Answer :** i) Active Power (P):- The active power is defined as the average power Pavg taken by or consumed by the given circuit. ii) Reactive Power (Q):- The reactive power is defined as the product of ... values of voltage (v) and current (I) it is given by iv) Power Triangle:

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**Description :** AC Circuits with Resistance but No Reactance

**Last Answer :** AC Circuits with Resistance but No Reactance AC Circuits with Resistance but No Reactance Series resistances let two resistances R 1 and R 2 are connected in series as shows in figure and there ... voltage. Voltage V A is common to both the branch hence voltage V A is common reference.

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**Description :** What is the need of polarity marking in polyphase AC circuits?

**Last Answer :** Need of Polarity Marking in Polyphase AC Circuits: i) Polarity marking of terminals provides reference polarity for better understanding of system, even if the polarity of ac voltage changes ... of current transformers in relay protection circuit and getting desired performance is very difficult.

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**Description :** Compare AC & DC track circuits on i) Length of circuit ii) Application iii) Effect of stray currents. iv) Maintenance

**Last Answer :** Ans: i) Length of circuit - a) AC track circuit is having long length upto 3 to 5 km b) DC track circuit is having short length ii)Application -a) AC track circuit is used ... ) Maintenance - a) AC track circuit has easier and cheaper maintenance b) DC track circuit has complicated maintenance

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**Description :** The instantaneous power in ac circuits can be obtained by taking product of the instantaneous values of

**Last Answer :** The instantaneous power in ac circuits can be obtained by taking product of the instantaneous values of current and voltage

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**Description :** In AC. circuits, laminated iron is invariably used in order to?

**Last Answer :** In AC. circuits, laminated iron is invariably used in order to reduce eddy current loss.

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**Description :** Kirchhoff's current law is applicable to 1. Closed loops in a circuit 2. Junction in a circuit 3. Magnetic circuits Which of the above is/are correct ? (a) 1 only (b) 2 only (c) 3 only (d) 1, 2 and 3

**Last Answer :** Kirchhoff's current law is applicable to 1. Closed loops in a circuit 2. Junction in a circuit 3. Magnetic circuits Which of the above is/are correct ? (a) 1 only (b) 2 only (c) 3 only (d) 1, 2 and 3

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**Description :** A given series LCR circuits is connected across a simusoidal AC voltage source. v = v0 sin (ωt) The inductance, L, in the circuit, has a value equal to 1/ω2C. The rms voltage drop, across L, C, and R, of this circuit, are ... {2}}\) (4) \(\frac{v_0}{\sqrt{2}R}.\frac{1}{ωC};\frac{v_0}{R}\) and v1

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**Description :** In AC circuits, AC meters measure – (1) mean values (2) rms values (3) peak values (4) mean square values

**Last Answer :** (2) rms values Explanation: Voltages and currents for AC circuits are generally expressed as rms (root mean square) values. For a sine wave, the relationship between the peak and the rms average is: rms value = 0.707 peak value.

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**Description :** Which of the following statements concerning AC circuits is correct? A. The power factor of a resistive circuit is always zero. B. True power in an inductive circuit always equals apparent power. ... . D. Total opposition to the flow of alternating current depends upon the amount of reactive power.

**Last Answer :** Answer: C

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**Description :** Transformers are used onboard ships with AC generators to _____________. A. change frequency B. increase power output to modulating frequency controllers C. decrease power output to modulating frequency ... D. permit higher voltage for electric motor operation and low voltage for lighting circuits

**Last Answer :** Answer: D

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**Description :** One of the following is a possible cause of an abrupt frequency variation in a self exited transmitter oscillator circuits resulting to a poor frequency stability to hold a constant frequency ... capacitor in the oscillator D. Loose connections in the oscillator, amplifier, or antenna circuits.

**Last Answer :** D. Loose connections in the oscillator, amplifier, or antenna circuits.

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**Description :** One of the following is a possible cause of an abrupt frequency variation in a self exited transmitter oscillator circuits resulting to a poor frequency stability to hold a constant frequency ... ac heating of resistors which cause change in values C. Heating of capacitor in the oscillator

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**Description :** Explain the terms real power, apparent power and reactive power for ac circuits and also the units used.

**Last Answer :** Real Power: It is the product of voltage, current and power factor i.e. P = V I cos j and basic unit of real power is watt. i.e. Expressed as W or kW. Apparent power: It is the product of ... X current X sinj or Reactive power = V I sin j and has no other unit but expressed in VAR or KVAR.

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**Description :** In AC circuits, AC meters measure (1) mean values (2) rms values (3) peak values (4) mean square values

**Last Answer :** rms values

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**Description :** Which of the following instruments is equally accurate on ac as well as dc circuits ? (a) PMMC voltmeter (b) Dynamometer wattmeter (c) Moving iron ammeter (d) Induction wattmeter

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**Description :** Wagner's earth devices are used in AC bridge circuits for (a) Eliminating the effect of earth capacitances (b) Eliminating the effect of intercomponent capacitances (c) Eliminating the effect of stray electrostatic fields (d) Shielding the bridge elements

**Last Answer :** Wagner's earth devices are used in AC bridge circuits for Eliminating the effect of earth capacitances

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**Description :** State Ohm’s law for electric circuit.

**Last Answer :** Ohms law -States that the current flows in a circuit is directly proportional to the applied voltage (V) and inversely the proportional resistance provided with the temperature main constant

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**Description :** Does the linear circuit obey Ohm's law?

**Last Answer :** Yes linear circuit obey Ohm's law and nonlinear circuit not satisfied Ohm's law.

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**Description :** State and explain Ohm’s law.

**Last Answer :** Ans: Ohm's law: As long as physical conditions (such as dimensions, pressure and temperature) are constant, the potential difference or voltage applied across the conductor is directly proportional to ... V/R where, R = constant of proportionality, called as the resistance of the conductor.

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**Description :** According to Ohm's law: (1) The voltage is constant to current (2) The voltage is proportional to current (3) Voltage is inversely proportional to current (4) The voltage is proportional to resistance

**Last Answer :** At constant temperature current passing through a conductor is directly proporstional to voltage across a conductor

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**Description :** Ohm’s law is applicable to : (A) Semi-conductors (B) Vacuum tubes (C) Electrolytes (D) Semiconductors and Vacuum tubes

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**Description :** is Ohms law applicable to vacuum tubes?

**Last Answer :** Ohm's law is not applicable to vacuum tubes.

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**Description :** An AC circuit has a capacitive reactance of 30 ohms in addition to an inductive reactance of 40 ohms connected in series. What is the reactance of the circuit? A. 8.37 ohms B. 10.00 ohms C. 50.00 ohms D. 70.00 ohms

**Last Answer :** Answer: B

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**Description :** An electrical component is connected across a 120 volt 60 hertz AC supply. What is the current drawn by the component if the impedance is 200 ohms? A. 0.01 amperes B. 0.60 amperes C. 1.67 amperes D. 100 amperes

**Last Answer :** Answer: B

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**Description :** Can you apply Thevenin's theorem in an AC circuit?

**Last Answer :** It can be applied to AC circuits

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**Last Answer :** Kirchhoff's current law for parallel circuits states that the: sum of the total currents flowing out of a junction equals the sum of the total currents flowing into that junction.

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**Description :** Kirchhoff's voltage law applies to circuits with?

**Last Answer :** Kirchhoff's voltage law applies to circuits with linear, non-linear, active, passive, time varying as wells as time-in-variant elements.

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**Description :** Kirchhoff s law is not applicable to circuits with?

**Last Answer :** Kirchhoff's law is not applicable to circuits with distributed parameters.

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**Description :** You are provided with a test resistance R, a high resistance R1 and a small resistance R2 , two identical galvanometer G1 and G2 and a variable voltage source V. You are required to set up a circuit for the verification of ohm’s law. Which of the following would be a correct circuit?

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**Description :** While performing the experiment on Ohm's law, a student plotted the V-I graphs for two resistances, individually and for their series and parallel combinations. The four plots are marked A, B, C and D in the graph shown below. The ... (1) 1 and 1/√3 (2) 1 and √3 (3) 1 and 0.732 (4) √3 and 1/√3

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**Description :** How do I use Ohm's law to show that power can be expressed by the equation P=I^2R?

**Last Answer :** Are you allowed to also use the relationship that P=IV? Because given that equation, it is then just a matter of simple replacement. V=IR (Ohm’s law), so replace the V in the first equation with IR to get P=I^2R.

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**Description :** What does OHM's law state? -Physics-10

**Last Answer :** Ohm's Law given by Georg Ohm states that, at constant temperature, the Potential Difference is directly proportional to the Electric Current. Formula: V = IR

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**Description :** What is ohm's law ? -Physics

**Last Answer :** If the temperature remains constant, the current flowing through the conductor is directed proportional to the Potential difference across the circuit. V ∝ I

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