Description : Define the following terms related to antennas; (i) Antenna resistance (ii) Directivity (iii) Antenna gain (iv) Power density
Answer :
Antenna Resistance - The resistance of an antenna has two components: 1. Its radiation resistance due to conversion of power into electromagnetic waves 2. The resistance due to actual losses in the ... the transmitter power divided by the surface area of a sphere (4πR2) at that distance.
Description : Problem on temperature coefficient of resistance 3
Answer :
Problem on temperature coefficient of resistance 3
asked
May 20, 2019
by
anonymous
Description : Problem on temperature coefficient of resistance 2
Answer :
Problem on temperature coefficient of resistance 2
asked
May 20, 2019
by
anonymous
Description : Problem on temperature coefficient of resistance 1
Answer :
Problem on temperature coefficient of resistance 1
asked
May 19, 2019
by
anonymous
Description : A resistor in which the resistance changes exponentially with change in temperature is called as A) Potentiometer B) Phototransistor C) Varactor D) Thermistor
Answer :
A resistor in which the resistance changes exponentially with change in temperature is called as Thermistor
asked
Jun 18, 2018
by
anonymous
Description : A semiconductor device made out of a material having very high temperature coefficient of resistance is
Answer :
A semiconductor device made out of a material having very high temperature coefficient of resistance is Thermistor
asked
Apr 23, 2018
by
anonymous
Description : With the increase in the temperature the resistance of copper: _____ and explain why? (1) Increase (3) Remain constant (2) Become zero (4) Decreases.
asked
Apr 9, 2018
by
anonymous
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.
asked
Mar 31, 2018
by
anonymous
Answer :
The resistance temperature coefficient is defined as the ratio of increase in resistance per degree centigrade to the resistance at 0oC.
asked
Mar 31, 2018
by
anonymous
Answer :
A metal resistor has resistance of 10 ohm at 0°C and 11 ohms at 160°C, the temperature coefficient is 0.000625 /°C.
asked
Mar 31, 2018
by
anonymous
Description : what is the temperature coefficient of Resistance of conductor ?
Answer :
conductors have positive coefficient. means as the temperature increases resistance also increases.
Description : what is the temperature coefficient of Resistance of semiconductor ?
Answer :
semiconductors have negative temperature coefficient of resistance. means as the temperature increases resistance decreases.
Description : In the following question, select the related word from the given alternatives. Temperature : Degree: : Area : ?
Answer :
Options: 1) Watt 2) Hectare 3) Kilogram 4) Ampere Correct Answer: Hectare
asked
Jun 24, 2020
by
anonymous
Description : Super conductors are substances that (1) offer minimum resistance to flow of electric current (2) conduct electricity at low temperature (3) conduct electricity at high temperature (4) offer high resistance to the flow of electric current
Answer :
offer minimum resistance to flow of electric current
Description : Indicate the false statement about the resistance of a wire (1) it depends on material of wire (2) it is directly proportional to the length of wire (3) it is directly proportional to the area of cross-section of wire (4) resistance of metallic wire increases with increase in temperature
Answer :
it is directly proportional to the area of cross-section of wire
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
asked
Apr 9, 2018
by
anonymous
Description : How does the resistance of a conductor compare to that of an insulator?
Answer :
The resistance of a conductor can be significantly lower than the resistance of an insulator, depending on each material's atomic properties.
asked
Jun 29, 2019
by
anonymous
asked
Feb 17, 2019
by
Zak
Description : The problem for the research related to metaphysics can be Options: A) What is meant by existence B) What are the qualities of the existence of the objects C) How knowledge of individuality of the objects can be realised D) All the above
Answer :
D) All the above
Description : P is the father of R and S is the son of Q and T is the brother of P. If R is the sister of S, how is Q related to T? (A) Wife (B) Sister-in-law (C) Brother-in-law (D) Daughter-in-law
Answer :
(B) Sister-in-law
Description : E is the son of A, D is the son of B, E is married to C, C is the daughter of B. How is D related to E ? (A) Brother (B) Uncle (C) Father-in-law (D) Brother-in-law
Answer :
(D) Brother-in-law
Description : Circle graphs are used to show: (A) How various sections share in the whole (B) How various parts are related to the whole (C) How one whole is related to other wholes (D) How one part is related to other parts
Answer :
Answer: B A circle is the same as 360°. You can divide a circle into smaller portions. A pa rt of a circle is called an arc and an arc is named according to its angle. A circle graph, ... data. A circle graph is usually used to easily show the results of an investigation in a pr oportional manner.
Description : ‘A’ is the father of ‘C’ , and ‘D’ is the son of ‘B’. ‘E’ is the brother of ‘A’. If ‘C’ is the sister of ‘D’ , how is ‘B’ related to ‘E’ ? (A) daughter (B) husband (C) sister - in - law (D) brother - in - law
Answer :
Answer: C B is sisiter in law of E, E is brother in law of B, A and B are parents of C and D. E is Uncle of C and D. So B is Sister-in-law of E.
Description : The question to be answered by factorial analysis of the quantitative data does not explain one of the following (A) Is ‘X’ related to ‘Y’ ? (B) How is ‘X’ related to ‘Y’? (C) How does ‘X’ affect the dependent variable ‘Y’ at different levels of another independent variable ‘K’ or ‘M’ ? (D) How is ‘X’ by ‘K’ related to ‘M’?
Answer :
(D) How is ‘X’ by ‘K’ related to ‘M’?
Description : 1. What is the respect for the National Flag and National Anthem? 2. What is the principle by which a cooling system (Radiator) in a motor car works? 3. Which ruler established embassies in foreign countries on modern lines? 4. In India, how many States share the coastline? 5. Which struggley of Mahatma Gandhi was ... expanded, what will its internal energy? 19. The daily and annual range of temperature is minimum in which area? 20. Who is the expounder of yoga philosophy?
Answer :
Answer : 1. Fundamental Duty of every citizen 2. Convection 3. Tipu Sultan 4. 9 5. Ahmedabad Struggle 6. Auto fuel policy 7. Floriculture 8. State Legislature 9. Karnataka 10. Ashfaqulla 11. ... 16. Photolysis 17. Consolidated Fund of the State18. Remain the same 19. Hot desert 20. Patanjali
Description : In software testing, how the error, fault and failure are related to each other? (A) Error leads to failure but fault is not related to error and failure (B) Fault leads to failure but error is not related to fault and failure (C) Error leads to fault and fault leads to failure (D) Fault leads to error and error leads to failure
Answer :
(C) Error leads to fault and fault leads to failure
Description : Describe with neat diagram, how temperature is measured by Gas filled thermometer.
Answer :
Explanation:- If volume of a gas is maintained at constant and If a certain volume of inert gas is enclosed in a bulb, capillary and bourdon tube, the most of the gas in the bulb, then the ... Name of the gases used in Gas filled thermometers. 1. Nitrogen 2. Helium 3. Inert Gas
asked
Sep 10, 2018
by
anonymous
Description : Describe construction and working of Resistance Temperature Detector (RTD).
Answer :
RTD: Construction and working: Resistance thermometer bulbs consist of a coil of fine wire wound or in a frame of insulating material. The resistance wire itself must be homogeneous in order to ... surrounding it. Thus RTD is used to measure temperature in terms of change in resistance.
Description : Certain substances loose their electrical resistance completely at super low temperature. Such substances are called. (1) Super conductors (2) Semi conductors (3) Dielectrics (4) Perfect conductors
Answer :
Super conductors
Description : For which of the following substances, the resistance decreases with increase in temperature? (1) Pure silicon (2) Copper (3) Nichrome (4) Platinum
Answer :
Nichrome
Description : Effect of Temperature on Resistance
Answer :
Effect of Temperature on Resistance
asked
Jun 6, 2020
by
anonymous
Description : The transducer with negative temperature co-efficient of resistance is (A) Thermistor (B) Resistance Thermometer (C) Strain Gauge (D) Thermocouple
Answer :
The transducer with negative temperature co-efficient of resistance is Thermistor
asked
Apr 25, 2018
by
anonymous
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
asked
Apr 11, 2018
by
anonymous
Description : Which amongst the following has a negative coefficient of temperature for resistance? a) Copper b) Lead c) Carbon d) Aluminium
Answer :
Which amongst the following has a negative coefficient of temperature for resistance? Carbon
asked
Apr 10, 2018
by
anonymous
Answer :
A semiconductor has Negative temperature coefficient of resistance.
asked
Mar 29, 2018
by
anonymous
Answer :
Substances whose specific resistance abruptly decreases at very low temperature are called superconductors.
asked
Mar 28, 2018
by
anonymous
Description : ______ has zero temperature co-efficient of resistance.
Answer :
Manganin has zero temperature co-efficient of resistance.
asked
Mar 28, 2018
by
anonymous
Description : The metal having the lowest temperature coefficient of resistance is
Answer :
The metal having the lowest temperature coefficient of resistance is gold.
asked
Mar 28, 2018
by
anonymous
Description : Temperature co-efficient of resistance is expressed in terms of?
Answer :
Degree celsius
asked
Mar 25, 2018
by
anonymous
Description : With rise in temperature the resistance of semi-conductors?
Answer :
With rise in temperature the resistance of semi-conductors decreases.
asked
Mar 25, 2018
by
anonymous
Description : With rise in temperature the resistance of pure metals?
Answer :
With rise in temperature the resistance of pure metals increases.
asked
Mar 25, 2018
by
anonymous
Answer :
4 different combinations may be obtained with three resistors, each having the resistance R.
asked
Mar 31, 2018
by
anonymous
Description : D's mother's father is C's father's father-in-law. How are C and D related if D is male and C female? Options: 1) D is C's wife's brother 2) C is sister of D's wife 3) D is C's brother 4) C is mother of D's wife
Answer :
Correct Answer: D is C's brother
asked
Jun 24, 2020
by
anonymous
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 think yourself lucky enough that you got an opportunity to mix-up with the people of different states B) You will never ... services C) You will feel free as having least family resistance 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 : How much resistance is needed to draw 17.6 mA from a 12 volt source? A.212 ohms B.6.8 kohms C.68 ohms D.680 ohms
Answer :
How much resistance is needed to draw 17.6 mA from a 12 volt source? A.212 ohms B.6.8 kohms C.68 ohms D.680 ohms
asked
May 15, 2018
by
anonymous
Description : How much resistance is required to limit the current from a 12 V battery to 3.6 mA? A.3.3 k ohms B.33 k ohms C.2.2 k ohms D.22 k ohms
Answer :
How much resistance is required to limit the current from a 12 V battery to 3.6 mA? A.3.3 k ohms B.33 k ohms C.2.2 k ohms D.22 k ohms
asked
May 15, 2018
by
anonymous
Description : Define the terms related to a.c. supply with waveform : i) Instantaneous value ii) Time period iii) Amplitude iv) Phase difference.
Answer :
i) Instantaneous value: The instantaneous value is the value of an alternating quantity (it may ac voltage or ac current or ac power) at a particular instant of time in the cycle . OR ... difference: Phase difference is the difference in phase angle between two sinusoids or phasors.
asked
Jul 30, 2019
by
anonymous
Description : Define the following terms related to Op-Amp: i) CMRR ii) SVRR
Answer :
Definition:- i) SVRR: It is defined as the ratio of change of input offset voltage to the change in one supply voltage while keeping other supply voltage constant. Ideally,SVRR=0 ii)CMMR:-The ... gain should exceed common-mode gain, this will be a positive number, and the higher the better.
asked
Sep 13, 2018
by
anonymous
Description : Define following terms related to measuring instruments: i) Sensitivity ii) Selectivity.
Answer :
i) Sensitivity: It is the ratio of the change in output signal to the change in input signal of quantity being measured. ii) Selectivity: It is the term to describe fulfillment of the requirements of measurement by an instrument to be suitable for use in a given situation.
asked
Sep 6, 2018
by
anonymous
Description : Write definition of ‘‘Branch’’ and ‘‘Node’’ related to electric circuit.
Answer :
i) Branch: A part of an electric network which lies between two junctions or nodes is known as branch. ii) Node: A point or junction where two or more elements of the network are connected together is called as node.
asked
Sep 4, 2018
by
anonymous