Physics
For which of the following substances, resistance decreases with increase in temperature?
- copper
- mercury
- carbon
- platinum
Related Questions
If the length l of wire is increased to 3l by stretching, its resistance R increases to ……………
- 3R
- 4R
- 6R
- 9R
Which of the following is an ohmic resistor?
- LED
- junction diode
- filament of a bulb
- nichrome wire
Standard resistors are made of :
- Copper
- Aluminium
- Constantan
- Carbon
The properties for which nichrome wire is used in heating appliances is/are :
- Specific resistance is high
- Resistance decreases with an increase in temperature
- Resistance increases with an increase in temperature
- Both (1) and (3)