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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asked
Jan 4
by
itszee

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

3 views 1 answer

asked
Jan 4
by
itszee

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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asked
Jan 15
by
anonymous

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

174 views 1 answer

asked
Jul 21, 2021
by
jyoti kurekar

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.

566 views 3 answers

asked
Oct 2, 2017
by
anonymous

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

1 view 1 answer

asked
Jan 4
by
itszee

What is ohm’s law for AC circuit?
**Last Answer :** I = V/Z amps. Z = V/I ohms. V = I * Z volts.

4 views 1 answer

asked
Nov 15, 2021
by
itszee

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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asked
Jan 4
by
itszee

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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asked
Jan 4
by
itszee

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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asked
Jan 4
by
itszee

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:

288 views 1 answer

asked
Jun 4, 2020
by
anonymous

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.

103 views 1 answer

asked
May 26, 2019
by
anonymous

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.

179 views 1 answer

asked
Sep 7, 2018
by
anonymous

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

100 views 1 answer

asked
Sep 2, 2018
by
anonymous

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

70 views 1 answer

asked
Aug 31, 2018
by
anonymous

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.

105 views 1 answer

asked
Mar 25, 2018
by
anonymous

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.

2 views 1 answer

asked
Jan 4
by
itszee

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

8 views 1 answer

asked
Jan 4
by
itszee

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

1 view 1 answer

asked
Jan 4
by
itszee

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.

3 views 1 answer

asked
Dec 25, 2021
by
rohanb31

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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asked
Dec 25, 2021
by
rohanb31

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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asked
Sep 28, 2021
by
itszee

15 views 1 answer

asked
Sep 27, 2021
by
umang gawde

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

20 views 1 answer

asked
Jan 21, 2021
by
anonymous

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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asked
May 26, 2018
by
anonymous

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

894 views 1 answer

asked
May 13, 2018
by
anonymous

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

308 views 1 answer

asked
Apr 25, 2018
by
anonymous

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

2 views 1 answer

asked
Jan 4
by
itszee

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

3 views 1 answer

asked
Jan 4
by
itszee

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

78 views 2 answers

asked
Aug 17, 2019
by
anonymous

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.

70 views 1 answer

asked
Jul 4, 2019
by
anonymous

114 views 1 answer

asked
Jun 11, 2019
by
anonymous

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.

56 views 1 answer

asked
Sep 2, 2018
by
anonymous

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

183 views 3 answers

asked
Apr 9, 2018
by
anonymous

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

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asked
Mar 31, 2018
by
anonymous

78 views 1 answer

asked
Mar 31, 2018
by
anonymous

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

241 views 1 answer

asked
Aug 16, 2017
by
anonymous

Can you apply Thevenin's theorem in an AC circuit?
**Last Answer :** It can be applied to AC circuits

105 views 1 answer

asked
Mar 10, 2018
by
anonymous

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asked
Mar 10, 2018
by
anonymous

93 views 0 answers

asked
Mar 10, 2018
by
anonymous

**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.

227 views 1 answer

asked
Mar 28, 2018
by
anonymous

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.

136 views 1 answer

asked
Mar 25, 2018
by
anonymous

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

124 views 1 answer

asked
Mar 25, 2018
by
anonymous

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.

0 views 1 answer

asked
Feb 28
by
anonymous

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

0 views 1 answer

asked
Feb 3
by
anonymous

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

0 views 1 answer

asked
Feb 2
by
anonymous

0 views 1 answer

asked
Jan 31
by
anonymous

What does Ohm's law describe the mathematical relationship between?
**Last Answer :** It describes the relation between voltage, current and theresistance of the circuit.

0 views 1 answer

asked
Jan 16
by
anonymous

Is ohm's law an universal law?
**Last Answer :** Ohm's Law is basically just the definition of resistance. Thatdoesn't make it very "universal", no matter how you choose todefine "universal".However, it's very useful for electricalcalculations.

0 views 1 answer

asked
Jan 16
by
anonymous

The law that finds application in electrolysis is: a) Faraday's law b) Coulomb's law c) Ohm's law d) Lenz's law
**Last Answer :** Ans: A

3 views 1 answer

asked
Jan 5
by
anonymous