A transformer that steps up voltage will have what kind of turns ratio?

A transformer that steps up voltage must have a turns ratio greater than 1. This is because the turns ratio is defined as the number of turns on the secondary coil compared to the number of turns on the primary coil. In a step-up transformer, the secondary coil has more turns than the primary coil. As a result, when alternating current is applied to the primary coil, the transformer increases the voltage in the secondary coil according to the ratio of the number of turns.

For example, if the primary coil has 100 turns and the secondary coil has 200 turns, the turns ratio would be 2:1, which is greater than 1. This greater ratio indicates that the voltage output from the secondary is higher than the voltage input to the primary.

The other options do not appropriately describe the characteristics of a step-up transformer. A turns ratio less than 1 would indicate a step-down transformer, equal to 1 would mean no change in voltage, and a negative value is not feasible in this context.