When a normal platinum wire is placed over a flame, it glows. This is a physical change because the things that make up the platinum have not been changed, but the appearance has changed.
117) Which of the following is not a chemical change?
Answer is:
Glowing of a platinum wire
Explanation:
Related RRB JE Mechanical Question Paper 2014 (Set-3) with Answer Key
Answer is:
dielectric
Explanation:
In capacitors, the metal plates are used to connect a voltage source in between the dielectric medium. Hence, the electric charge is produced in due to the presence of dielectric medium and it is stored in that dielectric medium itself.
Answer is: