s area of cross section is increased four times, what is the resistar on of resistance may be neglected.

Q: The power rating of a light bulb is the power it dissipates when connected across a 120 volt…

A:

Q: A voltmeter has a resistance 300 What will be its reading when it is connected a celf of emf Qualt…

A: To find-reading on voltmeter (i.e. potential difference ) V=?Given-Resistance of voltmeter (R)=30…

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A: This is a question from the electronics. JFET (Junction Field-effect Transistor): JFETs are…

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Q: Why does shallow resistivity log always be used to define bed boundaries? The Deep Resistivity did…

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Q: An ohmic appliance is rated at 100. W when it is connected to a 120. V source. a) If the power…

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Q: The storage battery of a car has an emf of 12 V. If the internal resistance of the battery is 0.42,…

A: Emf of battery, E = 12 V Internal resistance of battery, r = 0.4Let I be the maximum current drawn…

Q: A flashlight uses batteries that add up to 3 V and has a powerr output of 0.0005KW.  A) how much…

A: The data given is as follows, 1. The voltage is, Vb=3V 2. The output power is, P=0.0005 kW=0.5 W The…

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Q: An iron wire has a diameter 1.6 mm and resistivity 9.71x 10-8 m. What will be the length of this…

A: Given that :diameter :d= 1.6 mmHence,radius : r= 0.8 mmCross-sectional area : A=πr2…

Q: The e.m.f. of a cell is balanced by fall of potential along. 281 cm of potentiometer wire. If a…

A: To find-Internal resistance (r)=?Given-Initial balancing length (l1)=281 cmResistance connected…

Q: Q 8. (a) Show the linearized temperature dependent expression for resistance of thermistor and…

A: Given Nominal resistance R0     = 800 Ω Nominal temperature T0 = 15 + 273 = 288 K Specific…

Q: con sist of five resis tors as below. Determine the effective Tesistance in the circuit. connected…

A: Given: The resistance of the resistors is given as R1 = 50 ΩR2 = 25 ΩR3 = 30 ΩR4 = 60 ΩR5 = 70 Ω The…

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A:

Q: Digital thermometers often make use of thermistors, a type of resistor with resistance that varies…

A: Given: The resistance at 0.00°C is R0=76.2 Ω, The resistance at t=526°C is Rt=294 Ω.

Q: 1.0 m length of metal wire is connected to a 1.5 V battery, & current of 8.0mA. Resistivity of metal…

A: length = l = 1 mvoltage = V = 1.5 VCurrent = i = 8 x 10-3 Amp

Q: The potential difference accross the terminals of a battery is 20.0 V when the circuit is open. When…

A: Given:- The potential difference across the terminals of a battery E=20.0 V  current I= 2.0 A  the…

Q: A certain material has a resistance of 5 2 at 20°C. The material is then heated to 800°C, calculate…

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Q: What is Difference resistance of current carring   uniform conducting wire if we find value when it…

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A: Here the inner surface diameter is 0.5 mm and the outer surface diameter is 5 mm. Again the length…

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Q: Ex. 83 : The e.m.f. of a cell is balanced by fall of potential wire. If a resistance of 8N is…

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Q: 5. What is a fuse and how does it protect a circuit or device to which it is connected? 6. Show…

A: The fuse is device protected our device  and circuit  from sudden change of excess current

Q: Assume that canductivity of wire is 2 Cん Free carrier concentration is la 10 22 -3 CM in this ma…

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Q: 3. A metallic wire is stretched from original length of 3 m to 6 m. If the original cross-sectional…

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Q: A potential difference of 9 V is maintained across a conductor in a circuit. If the conductor has a…

A: Potential difference of the battery, V = 9 V resistance of the conductor, R = 10 ohms time, t = 5…

Q: You are asked to measure e.m.f of a cell. Which instrument will you use? A high resistance Voltmeter…

A: The potentiometer  is used to measure the e.m.f of cell.

Q: 2A 20V

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Q: (V)

A: Given: The DMM is used as a voltameter. The resistance of the voltmeter is 10 M. The resistance…

Q: Find the tolerance value of the resistance?

A: The answer is given below

Q: The terminals of its electromotive force 8 battery of intemal resistance r were connected to the…

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Q: If a copper wire is stretched to make it 0.1% longer, what is the percentage change in its…

A: Given. A copper wire is stretched to make it 0.1% longer. We can assume that the volume of the…

Q: Predict/Calculate A 65-W lightbulb operates on a potential difference of 95 V. Find (a) the current…

A: A 65 Watt lightbulb operates on a potential difference of 95 VNow powerP=IVcurrent in the bulb…

Q: An iron wire with a diameter of 2 mm will be used to connect a voltage source to a 100 kΩ resistor.…

A: Given data: The diameter of the iron wire is d = 2 mm The resistance of the resistor is R=100 kΩ…

Q: If we stretch a copper rod, making it 0.1% longer, a) How much would its resistance vary? b) What…

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Q: If the length of a conductor is halved and its area of cross section is doubled, then the…

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Q: si paraps and surgues bambupa The 45-V Lattery delivers 71w of power to the circuit What is the…

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Q: The e.m.f. of a cell is balanced by fall of potential along. 281 cm of potentiometer wire. If a…

A: To find-Internal resistance (r)=?Given-Initial balancing length (l1)=281 cmResistance connected…

Temperature Variance of Resistance

Electrical resistance or simply resistance is the property of a material that opposes the free flow of electrons through it. The total amount of resistance to the flow of charges (or current) is affected by many factors like the length of the conducting material, its cross-sectional area, resistivity, and temperature.