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- Tow resistors R, and R2 are conneoted in parallel in an elec+ric aircuit.IP the resis tor Ri is ehanged Prom 16 to 6.2 ohn's aud Rz is changed From 22 to 21.8 ohm's, fiud the absolute change, * relative ehange aud percentage in the totel KEES resistance R.PAR DOND 123: Two diametrically opposite points of a metal ring are connected to two terminals of the left gap of a meter bridge. In a right gap a resistance of 15 2 is introduced. If the null point is obtained at a distance of 40 cm from left end, find the resistance of wire bent in the shape of the ring,You are asked to measure e.m.f of a cell. Which instrumentwill you use? A high resistance Voltmeter or Potentiometer andwhy?
- Plz send me the solutionThe potentiometer Rx (adjustable resistor) in the given figure is to be designed to adjust current ix from 10 mA to 1 A. Calculate the values of Rand Rx by setting the potentiometer to its minimum and maximum values. Assume V = 120 V. (NOTE: Choose a combination, which makes the potentiometer most sensitive.) V (+ R www Rx The value of R and Rx are Q and k, respectively.The e.m.f. of a cell is balanced by fall of potential along. 281 cm of potentiometer wire. If a resistance of 8 2 is connected across the cell, the balancing length is found to be 151 cm. Calculate internal resistance of cell.
- How much current will be flowiing through a 40.0 length of copper wire with a radius 4.0 mm if it is connected to a source supplying 16.0 V? ( The resistivity of copper is 1.68E-8 ohm m)If a resistor placed across a 20V source absorbs 420J of energy in 7minutes, what is the value of the Resistor (in ohms) used?The unloaded terminal voltage of a battery is 4 V. The internal resistance of thebattery is 3 Ω. If an external resistor of 1 Ω is connected between the terminals ofthe battery, the terminal voltage would now be:
- to A cell e.m.f. 2 volt and negligible internal resistance is connected potentiometer wire of length 4 m and resistance 250 to form a close circuit. Find the potential gradient along the wire.be fast in answeringA polentiometer wire has a resistance fee unit length 0.152/m. A cell of emf. 1.5 V balance against 300 cm Length of cuire. Find current through potentiometer wire ?