The number and intensity of tropical cyclones in the north atlantic during a moderate to strong el nino phase of enso is typically lower than normal.

a true
b false

True

Explanation:

When warming of the  tropical eastern Pacific Ocean takes place it is known as El Nino and when cooling takes place it is known as La Nina. During the southern oscillation the sea temperature also changes.

During the El Nino years most of the weather activity takes place in the tropical pacific while the North Atlantic sees less weather activity.

The opposite is observed during La Nina years.

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

b.

the accuracy of the data.