Current Electricity questions
395 published questions with worked solutions.
- The wire of potentiometer has resistance 4 , and length 1 m. It is connected to a cell of e. m. f. 2 V and internal resistance 1...
- A voltmeter has a resistance of 50 , is connected across a cell of e. m. f. 2 V and internal resistance 10 , . The reading of...
- The e.m.f of Daniel cells gets balancing on 800 cm length of potential wire. When a 5 , resistance is connected at the terminal...
- The e. m. f. E of the battery is balanced by p. d. across 75 cm of a potentiometer wire. For a standard cell of e. m. f. 1.02 V,...
- A cell of e. m. f. 2 V and negligible internal resistance is connected in series with a potentiometer wire of length 100 cm. The...
- When two cells of e. m. f. 1.5 V and 1.1 V connected in series are balanced on a potentiometer, the balanced length is 260 cm,...
- A potentiometer wire is 10 m long and has a resistance of 2 , /m. It is connected in series with a battery of e. m. f. 3 V and a...
- An electron in the potentiometer wire experiences a force of 2.4 10^ -19 N. The length of the potentiometer wire is 4 m. The e....
- In a potentiometer circuit, there is a cell of e. m. f. 2 volts, internal resistance of 5 , a wire of uniform thickness of length...
- A graph is drawn between thermo emf and the temperature difference between the junctions. The slope of the graph at any point on...
- When a number of thermocouple are joined in series, the thermo e. m. f.
- An external resistance R is connected to a cell of internal resistance r. The power in the circuit is maximum when ?
- The current in the conductor varies with time t as I = 2t + 3t^2. Electric charge flow through a section of the conductor during...
- A wire of resistance 16 is bent in to a circle and a cell of e. m. f. 2 V and internal resistance 1 is connected between two...
- A resistance of potentiometer wire is 1 /m. A Daniel cell of e. m. f. 1.08 V balances at 216 cm on potentiometer. The current...
- A cell of e. m. f. 2 V and internal resistance 0.5 is connected across a resistor R. The current that flows is same as that, when...
- In comparing e. m. f. of two cells by a potentiometer, balance point is obtained on 5th wire, the current flowing through the...
- The internal resistance of an ideal cell is
- If the resistance across a 12 V source is increased by 4 . the current drops by 0.5 A. The original resistance was
- A voltmeter has a resistance of 80 . When it is connected to a battery of e. m. f. 6 V and of internal resistance 2 , the reading...
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