A fuse is used in main electric supply as a safety device. Which one of the following statements about the fuse is correct?

Which one of the following statements is NOT correct ?

Which one of the following statements is not correct?

With reference to the electric potential which of the following statements is incorrect?

Which one of the following statements regarding magnetic field is NOT correct ?

Of the two bulbs in a house, one glows brighter than the other. In this context which of the following statements is correct?