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प्रश्न
How does an increase in the temperature affect the specific resistance of a :
(i) Metal and
(ii) Semiconductor ?
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उत्तर
(i) Metal : Specific resistance increases
(ii) Semiconductor : Specific resistance decreases
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संबंधित प्रश्न
Write the formula of resistivity
- Draw a V-I graph for a conductor obeying Ohm’s law.
- What does the slope of V–I graph for a conductor represent?
State and define Ohm’s law.
State macroscopic form of Ohm’s law.
Define temperature coefficient of resistance.
Explain the equivalent resistance of a series resistor network.
Assertion: The statement of Ohm’s law is K = IR.
Reason: V = IR is the equation which defines resistance.
A student carries out an experiment and plots the V-I graph of three samples of nichrome wire with resistances R1, R2 and R3 respectively. Which of the following is true?
Suppose there is a circuit consisting of only resistances and batteries and we have to double (or increase it to n-times) all voltages and all resistances. Show that currents are unaltered. Do this for circuit of Example 3.7 in the NCERT Text Book for Class XII.
