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JEE PHYSICS MCQ: CURRENT ELECTRICITY
1
Medium
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Application
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Water boils in an electric kettle in after switching on. If the length of the heating wire is decreased to of its initial value, then the same amount of water will boil with the same supply voltage in
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Correct option: C
Option C () is correct because the time taken to boil water is inversely proportional to the square of the length of the heating wire.
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Statement-1: If a resistor is connected to a battery the current decreases when the temperature increases.
Statement-2: For most of the resistors, resistance increases with increase in temperature. The reciprocal of resistance is Corresponding to the resistance , which is order of colour coding on carbon resistors? In a meter bridge, the gaps are closed by resistance 2 and 3 ohms. The value of shunt to be added to 3 ohm resistor to shift the balancing point by is
Statement-2: For most of the resistors, resistance increases with increase in temperature. The reciprocal of resistance is Corresponding to the resistance , which is order of colour coding on carbon resistors? In a meter bridge, the gaps are closed by resistance 2 and 3 ohms. The value of shunt to be added to 3 ohm resistor to shift the balancing point by is