Yesss every inductor has resistance ...

Because it is also made up of good conductor have some value of resistance practicaly

But ideal inductor has resistance is zero

Because it is also made up of good conductor have some value of resistance practicaly

But ideal inductor has resistance is zero

answered
Jan 21, 2018
by
NITIN P. DESHMUKH

Description : inductors have a high impedance when?

**Answer** : When you increase the number of turns.

Description : An air core transformer has primary and secondary inductors of 8mH and 10 mH respectively. The mutual inductance is 5mH. The coefficient of coupling is A) 1/8 B) 1/6 C) ¼ D) ½

Description : Compared to wire resistance transducers, for temperature measurement, thermistors have advantage of A) Low value temperature coefficient B) High thermal capacity C) High speed of response D) Large size

Description : The beds which have a gentle upstream dip will be_______ to the resultant force (R), hence can provides the best resistance to withstand the stresses or loads acting in the area. (A) Parallel (B) Perpendicular (C) None of these

**Answer** : (B) Perpendicular

Description : A resistor with the color coded value of 1000 ohms and ± 10% tolerance can have an actual resistance between ________. A. 990 ohm and 1010 ohm B. 900 ohm and 1100 ohm C. 1000 ohm and 1100 ohm D. 900 ohm and 1000 ohm.

**Answer** : A resistor with the color coded value of 1000 ohms and ± 10% tolerance can have an actual resistance between 900 ohm and 1100 ohm.

Description : Capacitors and inductors are commonly used in circuits. Capacitors store electrical energy in the electric field between their plates. How do inductors store energy?

**Answer** : ANSWER: IN A MAGNETIC FIELD SURROUNDING THE INDUCTOR

Description : State two types of inductors and give their applications.

**Answer** : Types of inductors: i) Air cored inductor ii) Iron cored inductor iii) Ferrite cored inductor Air cored inductor: These are used for high frequency application e.g. Radio sets ... radio receiver, wide band pulse transformers, oscillators, signal generators, high frequency amplifiers, etc.

Description : Four inductors each of inductance 1mH are connected in parallel and this combination is connected in series with two inductors each of inductance 1mH. Calculate the equivalent inductance?

**Answer** : Four inductors each of inductance 1mH are connected in parallel and this combination is connected in series with two inductors each of inductance 1mH. Calculate the equivalent inductance? 2.25 mH

Description : Shunt Inductors are primarily installed in transmission lines to : (A) Improve Power Factor (B) Improve Stability (C) Reduce Ferranti Effect (D) Improve Voltage Profile

Explain the electrical losses of magnetic materials used for the cores of inductors and transformer.

Description : Explain the electrical losses of magnetic materials used for the cores of inductors and transformer.

Description : Which of the following is a negative-resistance microwave device for oscillator applications? A) IMPATT Diode B) Gunn Diode C) Snap diode D) Schottky Diode

**Answer** : Which of the following is a negative-resistance microwave device for oscillator applications? A) IMPATT Diode B) Gunn Diode C) Snap diode D) Schottky Diode

Description : The lossless line of characteristics impedance 300 Ohm is terminated in a pure resistance of 200 Ohm. The value of the standing wave ratio is (a) 1.5 (b) 0.67 (c) 1.0 (d) 1.25

**Answer** : The lossless line of characteristics impedance 300 Ohm is terminated in a pure resistance of 200 Ohm. The value of the standing wave ratio is 1.5

Description : In an R-2R ladder D/A converter, the input resistance is 1. Not same for all digital inputs 2. R for each input 3. 2R for each input 4. 3R for each input

**Answer** : In an R-2R ladder D/A converter, the input resistance is 3R for each input

Description : Ratio of the rotor reactance X to the rotor resistance R for a two-phase servo motor (A) is equal to that of a normal induction motor (B) is less than that of a normal induction motor (C) ... than that of a normal induction motor (D) may be less or greater than that of a normal induction motor

**Answer** : C

Description : Which diode exhibits negative resistance characteristic? (A) LED (B) Zener (C) Tunnel diode (D) PN diode

**Answer** : Which diode exhibits negative resistance characteristic? (A) LED (B) Zener (C) Tunnel diode (D) PN diode

Description : Twelve 1 ohm resistances are used as edge to form a cube. The resistance between two diagonally opposite corners of the cube is: (1) 5/6 ohm (2) 1 ohm (3) 6/5 ohm (4) 3/2 ohm

**Answer** : Twelve 1 ohm resistances are used as edge to form a cube. The resistance between two diagonally opposite corners of the cube is: 5/6 ohm.

Description : How does the resistance of a circular conductor behave, if the diameter of the conductor is halved? A) Remains unchanged B) Doubles C) Becomes 4 times D) Becomes one -fourth

Description : Which of the following amplifier configurations has the lowest input resistance? A) Common Emitter B) Common Base C) Common Collector D) Emitter Follower

Description : An amplifier which has almost same gain and input resistance of a CE amplifier but of higher bandwidth is A) Cascode amplifier B) Cascade amplifier C) Darligton amplfier D) CC amplifier

Description : For a CE amplifier, operating current is 1mA, load resistance is 5 kOhm.The forward bias capacitance is 50 nF and reverse bias capacitance is 10 nF. Total input capacitance in nF is around A) 40 B) 60 C) 500 D) 2000

Description : The total output offset voltage for a noninverting amplifier with input resistance 1 kOhm , feedback resistance 10 k Ohm, input offset voltage 10 mV and input bias current 100 nA is, about A) 25 mV B) 55 mV C) 110 mV D) 220 mV

Description : The hot resistance of a bulb’s filament is higher than its cold resistance because the temperature coefficient of the filament is:

**Answer** : positive

**Answer** : The resistance of a conductor will be least For dc.

Description : The current in a circuit with resistance in 6 amp. When an additional resistance of 4 ohms is inserted the current drops to 4 amp. The original resistance in ohms is

**Answer** : The current in a circuit with resistance in 6 amp. When an additional resistance of 4 ohms is inserted the current drops to 4 amp. The original resistance in ohms is 8.

Description : What should be the ideal resistance of ammeter ?

**Answer** : Ideal resistance of ammeter should be zero.

Description : Is the filament resistance lower or higher in a 500 watt light bulb than in a 100 watt light? Assume that both bulbs have been designed to operate at 110 volts.

**Answer** : ANSWER: LOWER

Description : A projectile is fired into the air at an angle of 23 degrees. At what other angle would this projectile have the same range if air resistance is neglected? w) 46 degrees x) 60 degrees y) 67 degrees z) 68 degrees

**Answer** : ANSWER: Y -- 67 DEGREES

Description : If you get an opportunity to serve a central school, but in turn you miss the opportunity to enjoy your home town. How would you accommodate in these conditions? Options: A) You will ... and obligations D) You will have great pride in thinking yourself a powerful link in national integration

**Answer** : A) You will think yourself lucky enough that you got an opportunity to mix-up with the people of different states

Description : An element is said to have negative resistance when (a) The element has negative temperature coefficient (b) The current / voltage curve has negative slope (c) The element has negative specific resistance (d) The current / voltage curve has a positive slope

**Answer** : An element is said to have negative resistance when The current / voltage curve has negative slope

Description : Two materials have resistance temperature coefficients of 0.004 and 0.0002 respectively at a given temperature. In what ratio should the wires made of these materials be connected in series so as to have an overall temperature coefficient of 0.002?

**Answer** : Two materials have resistance temperature coefficients of 0.004 and 0.0002 respectively at a given temperature. In 9:10 ratio should the wires made of these materials be connected in series so as to have an overall temperature coefficient of 0.002.

Description : Two coils connected in series have resistance of 600 ohm and 300 ohm and temperature coefficients of 0.1% and 0.4% respectively.The resistance of the combination at 50oC will be

**Answer** : Two coils connected in series have resistance of 600 ohm and 300 ohm and temperature coefficients of 0.1% and 0.4% respectively.The resistance of the combination at 50oC will be 990 ohm

**Answer** : The internal resistance of the voltmeter must be very high in order to have Minimum current through the meter.

Description : Two bulbs of 500 W and 200 W rated at 250 V will have resistance ratio as?

**Answer** : Two bulbs of 500 W and 200 W rated at 250 V will have resistance ratio as 2 : 5.

Description : The substances which have a large number of free electrons and offer a low resistance are called?

**Answer** : The substances which have a large number of free electrons and offer a low resistance are called conductors.

**Answer** : Yes ammeter has its own resistance Not only ammeter every electrical devices has there own resistance practicaly

Description : all resistance in parallel will have same?

**Answer** : Voltage drop

Description : all resistance in series will have same?

**Answer** : All resistance have same current when they connected in series

Description : 220kV three phase transmission line is 60 km long. The resistance is 15 Ohms per phase and the inductance is j 30 Ohms. 1- Calculate : voltage regulation, TL line power losses and efficiency when ... for 0.85, calculate zise of the required capacitor and the same parameters which were in part 1

Description : A circuit has a resistance of 200 ohms. The resistance of the circuit can be reduced to 120 ohms by adding which of the following to the circuit. w) 80 ohm resistor in series x) 150 ohm resistor in parallel y) 240 ohm resistor in series z) 300 ohm resistor in parallel

**Answer** : ANSWER: Z -- 300 OHM RESISTOR IN PARALLEL

Description : This natural fiber obtained from the stems of a plant of the nettle family has found popularity in modern fibers with a high wet strength, absorbent but dries quickly, it can be spun or woven, has a high rot ... a source of heat or power? w) Plutonium-238 x) Strontium-90 y) Cesium-137 z) Uranium-235

**Answer** : ANSWER: W -- PLUTONIUM-238

Description : A galvanometer can be converted to a voltmeter by connecting (1) a high resistance in parallel (2) a high resistance in series (3) a low resistance in series (4) a low resistance in parallel

**Answer** : a high resistance in series

Description : A galvanometer can be converted into a voltmeter by connecting with it a (1) high resistance in parallel (2) low resistance on parallel (3) high resistance on series (4) low resistance in series

**Answer** : high resistance on series

Description :

Description : Which method can be used for absolute measurement of resistance? A. Ohm's law method B. Wheatstone bridge method C. Both A & B D. None of these.

**Answer** : Wheatstone bridge method can be used for absolute measurement of resistance.

Description : The temperature of resistance furnaces can be controlled by changing the: (A) applied voltage (B) number of heating elements (C) circuit configuration (D) all of the above

**Answer** : The temperature of resistance furnaces can be controlled by changing the: (A) applied voltage (B) number of heating elements (C) circuit configuration (D) all of the above

**Answer** : The resistance can be measured most accurately by bridge method.

**Answer** : A moving-coil permanent-magnet instrument can be used as ammeter by using a low resistance shunt.

**Answer** : Yes we can use potentiometer for measuring resistance.

**Answer** : Voltmeter is used to measure voltage in a circuit.Ohmmeter is used to measure the resistance of a component in a circuit.

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