Consider the following statements:
An ordinary light bulb has a rather short life because the
1.) filament wire is not uniform
2.) bulb cannot be evacuated completely
3.) wires supporting the filament melt at high temperature
which of the above statements are correct?
Consider the following statements:
Assertion (A ): Soft iron is used magnetic shielding
Reason(R ): Soft iron attracts a maximum number of magnetic items into it
A,R both are wrong
A,R both are right
A is right,but R is wrong
A is wrong , but R is right