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Question
The circuit depicted in the figure is employed for studying Ohm's Law. Instead of using a standard resistor, a student opts for a glass tube filled with mercury (tube 1), connected to the circuit through two electrodes E1 & E2. He records the readings of the ammeter and voltmeter, thereby calculating the resistance. The student repeats the experiment by substituting tube 1 with tube 2, where the same amount of mercury fills the tube 2.
Neglecting internal resistance of the cell use (> or < or =) to compare
- the resistance in both the cases.
- the voltmeter readings in both the cases.
- the specific resistance in both the cases.
Solution
- Resistance of the tube 2 < Resistance of the tube 1.
- The voltmeter reading for tube 1 is the same as for tube 2.
- The specific resistance in both cases is the same.
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