How does a transformer affect the voltage and current?

  • A
    It increases both voltage and current.
  • B
    It decreases both voltage and current.
  • C
    It increases voltage and decreases current,or vice versa,based on the turns ratio.
  • D
    It keeps both voltage and current constant.

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Similar Questions

$A$ step-up transformer has $300$ turns of primary winding and $450$ turns of secondary winding. The primary is connected to $150 \ V$ and the current flowing through it is $9 \ A$. The current and voltage in the secondary are:

$A$ transformer has an efficiency of $80 \%$. The input power to the primary coil is $4 \text{ kW}$ at a voltage of $100 \text{ V}$. If the secondary voltage is $200 \text{ V}$,what are the primary and secondary currents,respectively?

$A$ $220 V$ input is supplied to a transformer. The output circuit draws a current of $2.0 A$ at $440 V$. If the ratio of output to input power is $0.8$,then the current drawn by the primary winding is: (in $A$)

Which of the following statements is correct regarding a step-down transformer?

How much current is drawn by the primary coil of a transformer,which steps down $220 V$ to $55 V$ to operate a device with an impedance of $275 \Omega$ (in $A$)?

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