# Define resistance capacitance & inductance

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Resistance: This could be defined as the opposition  or retarding force to the flow of current in a circuit. It is measured in Ohms.

Capacitance: The ability of a system of electrical conductors and insulators to store electrical charge when a potential difference is existing between the conductors. It is the mathematically expressed in Farad.

Inductance: The ability of a circuit, coil that causes an e.m.f to be set up due to a rate of change of current in the circuit or coil. It's unit is Henry.

## Related questions

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Description : A parallel combination of capacitance C and resistance R is connected in series with inductance L and small resistance r. Under what condition will the circuit be non-reactive?  (A) C=LR (B) C=LR2 (C) C=L/R2 (D) C=L/R

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Description : A coil of resistance 10 Ω and inductance 100mH and a capacitor of variable capacitance are connected across a 20V, 50Hz A.C. supply. At what capacitance will resonance occur?

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Description : An LCR series circuit, with resistance 100Ω is connected to an a.c. source of 200 V and angular frequency 300 rad/s. When the capacitance is removed from the circuit, current lags behind the ... removed from the circuit, the current leads the voltage by 600 . Calculate the current in the circuit.

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Description : An a.c. source of frequency 50 Hz is applied to a series circuit of resistance 20Ω , an inductance of 100 mH and a capacitance of 30μF . Does the current lag or lead the applied voltage? If so, by what (phase) angle?

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Description : A sinusoidal A.C. voltage source, of adjustable frequency, is connected across a series LCR' combination. The inductance (L) and the capacitance (C), present in the circuit, can be expresssed in terms of the quality factor (Q) the ... $$L=\frac{1}{ω_0Q^2R^2}$$ and $$C = (\frac{Q^2R^2}{ω_0})$$

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Description : The inductance, capacitance and resistance in a given series LCR circuit, have values of (n) henry, (1/n3) farad and (n2) ohm. The quality factor, Q, and the resonant frequency (v0) , of this circuit, equal, respectively, (1) $$Q=\ ... frac{2\pi}{n}$$ (4) $$Q=\frac{8\pi^2}{n^2}; v_0=\frac{4\pi}{n}$$

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Description : It is required to improve the sharpness of resonance of a series LCR circuit by a factor of 4. This requirement can be met by (1) increasing the resistance to 4 times its present value; leaving L and ... C and R unchanged (4) decreasing the capacitance by a factor or 4; leaving L and R unchanged

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Description : What is the effect of resistance , inductance and capacitance in transmission line ?

Last Answer : These 3 factors create voltage drop and power loss of the line. The inductive reactance creates a voltage drop across the line and the capacitance creates a charging current.

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Description : 'Farad' is the unit of : (1) Capacitance (2) Inductance (3) Resistance (4) Conductance

Last Answer : (1) Capacitance Explanation: The Farad is the SI derived unit of capacitance. It is named after the English physicist Michael Faraday.

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Description : The fuse in our domestic electric circuit melts when there is a high rise in – (1) Inductance (2) Current (3) Resistance (4) Capacitance

Last Answer : (2) Current Explanation: In electronics and electrical engineering, a fuse is a type of low resistance resistor that acts as a sacrificial device to provide over protection, of either the load ... fuse interrupts excessive current (blows) so that further damage by overheating or fire is prevented.

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Description : The formula for computing impedance in a series circuit containing resistance, capacitance, and inductance is _____________. [ NOTE: the symbol * stands for 'multiplied by' ] A. Z = RT + XL + XC B. Z = R + XL - XC C. Z * Z = R * R + (XL - XC) * (XL - XC) D. Z = R * R + (XL * XC) - (XL * XC)

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Description : Capacitance is the property of an electric circuit opposing a change in the _____________. A. current in the circuit B. voltage in the circuit C. inductance in the circuit D. resistance in the circuit

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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

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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

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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

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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

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Description : The Wheatstone bridge is a precision measuring instrument utilizing the principle of changes in _____________. A. inductance B. capacitance C. resistance D. amperage

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Description : If an antenna is too short for the wavelength being used, the effective length can be increased by adding: A. capacitance in series B. inductance in series C. resistance in parallel D. resistance in series

Last Answer : B. inductance in series

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Description : A transmitted signal 5 meters in wavelength is received by an antenna coil having a 50-Ω resistance and a 0.01 H inductance. What is the capacitance of the tuner shunting the antenna coil at this point? A. 0.704 fF B. 0.704 μF C. 0.704 nF D. 0.704 mF

Last Answer : A. 0.704 fF

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Description : The resistance in a magnetic material is called as a) Capacitance b) Inductance c) Reluctance d) Magnetic resistance

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Description : The magnetostatics highly relies on which property? a) Resistance b) Capacitance c) Inductance d) Moment

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Description : Hays bridge is used to measure___________ and Schering bridge is used to measure____________ a) Inductance, Inductance b) Inductance, Capacitance c) Capacitance, Inductance d) Resistance, Capacitance

Last Answer : Ans: Inductance, Capacitance

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Description : Which of the following parameter can be neglected for a short line ? (a) Inductance (b) Capacitance (c) Resistance (d) Reactance

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Description : Which of the following are the constants of the transmission lines ? (a) Resistance (b) Inductance (c) Capacitance (d) All of the above

Last Answer : (d) All of the above

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Description : A transmission line is said to have distributed constants of inductance, capacitance, and resistance along the line. What units of measurement are used to express these constants?

Last Answer : Inductance is expressed in micro henrys per unit length, capacitance is expressed in picofarads per unit length, and resistance is expressed in ohms per unit length.

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Description : An AC bridge that measures inductance in terms of resistance and capacitance.

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Description : Refers to an ac bridge for measuring the inductance and Q of an inductor in terms of resistance, frequency and a standard capacitance.

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Description : Which of the following are the constants of the transmission lines ? (a) Resistance (b) Inductance (c) Capacitance (d) All of the above

Last Answer : (d) All of the above

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Description : In AC Circuit Theory, the term that replaces the resistance is: w) inductance x) capacitance y) impedance z) reactance

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Description : ‘Farad’ is the unit of : (1) Capacitance (2) Inductance (3) Resistance (4) Conductance

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Description : An a.c series circuit has resistance of 10ohm, inductance of 0.1H and capacitance of 10µf, voltage applied to circuit is 200V. find (i) Resonant frequency (ii) Current at resonance (iii) Power at resonance

Last Answer : Solution: For RLC series circuit

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Description : effect of inductance and capacitance on performance of transmission line.

Last Answer : Following are the effect on performance of transmission line:  1. Due to inductance (L) voltage drop in transmission line produces.  2. Capacitor (C) draws charging current ... , transmission line efficiency, voltage regulation & also power factor of transmission line gets affected.

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Description : State the effects of errors in dynamometer type wattmeter due to i) pc- inductance ii) pc- capacitance iii) mutual inductance iv) Connection.

Last Answer : Errors in wattmeter:  i) pc - inductance: Pressure coil inductance causes wattmeter to read more power than actual .  ii) pc-capacitance: The wattmeter reads less power.  iii) ... iv) Connection: In uncompensated wattmeter , the reading of wattmeter includes the powerloss in coils.

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Description : In series resonant circuit, increasing inductance to its twice value and reducing capacitance to its half value?

Last Answer : In series resonant circuit, increasing inductance to its twice value and reducing capacitance to its half value will increase the selectivity of the circuit.

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Description : An electrical circuit is made up of an inductance (L), a capacitor (C) and a resistor (R), connected in series. When it is connected across the mains (Voltage = 111.8 V ≃ 12500 V), it draws 125W power from these mains. ... , 142Ω (2) 106.5Ω , 213Ω , 106.5Ω (3) 89Ω , 178Ω , 89Ω (4) 71Ω , 142Ω , 71Ω

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Description : Which of the following circuit elements is used to 'block' DC in an electronic circuit? (1) Resistances (2) Capacitance (3) Inductance (4) Diode

Last Answer : (2) Capacitance Explanation: A capacitor (originally known as condenser) is a passive two-terminal electrical component used to store energy in an electric field. Capacitors are widely used ... electric power transmission systems for stabilizing voltage and power flow, and for many other purposes.

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Description : The basic control action of a magnetic amplifier depends upon _____________. A. variations in the load capacitance B. changes in inductance C. type of core material D. construction of the core

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Description : If the length of a Hertz dipole is decreased A. its resonant frequency will be lowered its distributed inductance will be increased B. its distributed inductance will be decreased C. its ... frequency will be increased D. its distributed capacitance between the antenna and ground will be increased.

Last Answer : C. its resonant frequency will be increased

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Description : What is the propagation velocity of a signal in a transmission line whose inductance and capacitance are 5μH/m and 20μF/m respectively? A. 100x103 m/s B. 100 m/s C. 10x103 m/s D. 100x106 m/s

Last Answer : A. 100x103 m/s

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Description : What is the velocity factor of coaxial cable with a characteristic impedance of 50Ω and capacitance of 30pF/ft and inductance of 75 nH/ft? A. 0.58 B.0.68 C. 0.98 D. 0.81

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Description : Which of the following determines the characteristics of a transmission line? A. Inductance B. Capacitance C. Physical dimension D. Length

Last Answer : C. Physical dimension

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Description : Referred to the dielectric constant of a transmission line material. A. Inductance and capacitance B. Velocity factor C. Characteristic impedance D. Propagation velocity

Last Answer : B. Velocity factor

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Description : Over lap Angle depends on_________ a) Load inductance b) Loa capacitance c) Source inductance d) Source capacitance

Last Answer : Ans: Source inductance

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Description : Capacitance grading of cable implies (a) use of dielectrics of different permeabilities (b) grading according to capacitance of cables per km length (c) cables using single dielectric in different ... introduced at different lengths to counter the effect of inductance (e) none of the above

Last Answer : (a) use of dielectrics of different permeabilities

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Description : . What are two of the three physical factors that determine the values of capacitance and inductance of a transmission line?

Last Answer : (1) Type of line used, (2) dielectric in the line, and (3) length of line.

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Description : This refers to a four-arm ac bridge used for measuring inductance against a standard capacitance.

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Description : .A(75-j50)-is connectedtoa coaxialtransmission lineofZO=75 ,at 10GHz.The bestmethod ofmatching consistsin connecting a. a short-circuited stub at the load b. an inductance at the load c. a capacitance at some specific distance d. a short-circuited stub at some specific distance from the load

Last Answer : d. a short-circuited stub at some specific distance from the load

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Description : Which of the following circuit elements is used to ‘block’ DC in an electronic circuit ? (1) Resistances (2) Capacitance (3) Inductance (4) Diode

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Description : A cable has inductance of 0.22 mH per kilometer and capacitance of 0.202 µF per kilometer. The surge impedance of the cable is (a) 50 Ω (b) 42 Ω (c) 33 Ω (d) 28 Ω

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Description : A 800 kV transmission line is having per phase line inductance of 1.1 mH/km and per phase line capacitance of 11.68 nF/km. Ignoring the length of the line, its ideal power transfer capability in MW is (A) 1204 MW (B) 1504 MW (C) 2085 MW (D) 2606 MW

Last Answer : A 800 kV transmission line is having per phase line inductance of 1.1 mH/km and per phase line capacitance of 11.68 nF/km. Ignoring the length of the line, its ideal power transfer capability in MW is 2085 MW