Question 1
Marks : +2 | -2
Pass Ratio : 100%
Which of the following is correct for thermistors?
Explanation: For thermistors as temperature increase, resistance decreases.
Question 6
Marks : +2 | -2
Pass Ratio : 100%
A metal with temperature coefficient of resistance has a value 200, its initial resistance is given by 40Ω. For an increase in 300c to350c what will be the final resistance value?
Explanation: Answer obtained using expression RT=R0(1+αΔT), where α represents temperature coefficient of resistance, R0 and RT represents initial and final resistance values.
Question 7
Marks : +2 | -2
Pass Ratio : 100%
What will happen for resistivity metal and semiconductor if the temperature is increased?
Explanation: Metal has a positive temperature coefficient of resistance and semiconductor has a negative temperature coefficient of resistance.