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While doing an experiment with potcntiometc as shown in figure in was found that th deflection is one sided and(i) the detlectio, decreased while moving from one end A of the wire to the end B,(ii) the deflection increase while the jockey was moved towards the end (i) Which terminal + or - ve Of the cell E_(1)connected at X in case (i) and how is related to E ? (ii) Which terminal of the cellE_(1) is connected at X in case (ii) ? |
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Answer» SOLUTION :(i) Deflection of galvanometer is on one SIDE when jokey key is moved from A to B if deflection decreases, then it can be SAID that current through primary cell (LOWER circuit) decrease. and p.d. between point A and jokey key increase. This is possible only if positive of `E_(1) ` cell is connected with terminal X, thus `E_(1) gt ` E (ii) When jokey key is moved from A to B if deflection increases then it can be said that current through primary cell (lower circuit) increases and p.d. between jokey key and A decreases. This is possible only if positive of `E_(1) ` cell is connected with X. |
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