A balloon is filled with 26L of helium in the morning when the temperature is 17°C. By noon the temperature has risen to 32°C. What is the new volume of
the balloon?

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current

no but i do not usually comment or use my voice that much when it comes to social media