Physics
A step up transformer …………… the current whereas a step down transformer …………… the current.
- increases, increases
- decreases, decreases
- decreases, increases
- increases, decreases
Electro-Magnetism
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Answer
decreases, increases
Reason — In a step up transformer the number of turns in the secondary coil is more than the number of turns in the primary coil ( Ns > Np) i.e., turns ratio n > 1. It increases the a.c. voltage and decreases the current. i.e., Es > Ep and Is < Ip.
In a step down transformer the number of turns in the secondary coil is less than the number of turns in the primary coil ( Ns < Np) i.e., turns ratio n < 1. It decreases the a.c. voltage and increases the current. i.e., Es < Ep and Is > Ip.
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