Answer:
360 V
Explanation:
We can use the transformer equation:

where
is the primary (input) voltage
is the number of turns in the primary coil
is the secondary (output) voltage
is the number of turns in the secondary coil
In this problem,

Substituting into the equation, we can find the output voltage:

a. work is the time it takes to move an object once acted upon by a force
No. You cannot rule out the battery even after the open circuit voltage measurement. The open-circuit voltage may not have changed but the battery's internal resistance may have greatly increased.