Science > Physics > Current Electricity > Numerical Problems on Internal Resistance of Cell Example 01: A steady P.D. is maintained between the ends of the potentiometer wire. A cell of e.m.f. 1.02 V is on an open circuit when its terminals are in contact with two points on the wire distant 150 cm. When […]
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Numerical Problems on Potential Drop
Science > Physics > Current Electricity > Numerical Problems on Potential Drop In this article, we shall study to solve numerical problems on the calculation of potential drop (potential gradient) on potentiometer wire. Example 01: A potentiometer wire is 10 m long and a P.D. of 6 V is maintained between its ends. Find the […]
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Potentiometer
Science > Physics > Current Electricity > Potentiometer In this article, we shall study the principle, construction, and working of a potentiometer and its uses. Principle of Potentiometer: When a steady current flows through a wire of uniform cross-section the potential difference per unit length of the wire is constant throughout the length of the […]
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Ammeter and Voltmeter
Science > Physics > Magnetic Effect of Electric Current > Ammeter and Voltmeter Ammeter: An ammeter is an electrical measurement device (apparatus) which is used to measure the electric current in the electrical circuit. Requirements of Good Ammeter: The resistance of an ammeter must be as small as possible. The ideal resistance of an ammeter […]