What is the effect of a rise in temperature in the resistance of pure metals?*Constant resistanceNoneIncrease resistanceDecrease resistance

The resistance of pure metals typically increases with a rise in temperature. This is because as temperature increases, the atoms in the metal vibrate more. This increased vibration can cause more collisions between the electrons and the atoms, which increases the resistance. Therefore, the correct answer is "Increase resistance".

The resistance of pure metals generally increases with a rise in temperature. This is because as temperature increases, the atoms of the metal vibrate more vigorously. This increased vibration makes it more difficult for the electrons to flow, thus increasing the resistance.