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Question

# In a transformer, in which the losses may be neglected, the ratio of the primary voltage to secondary voltage is found to be 4:1. The ratio of the primary to secondary turns and the ratio of the primary current to secondary current are respectively in the ratio of :

A
4 : 1 & 1 : 4
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B
1 : 4 & 4 : 1
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C
4 : 1 & 4 : 1
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D
1 : 4 & 1 : 4
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Solution

## The correct option is A 4 : 1 & 1 : 4VpVs=4as we know, V∝1i, and i∝1no.ofturnsRatio of primary current to secondary currentipis=VsVp=14 ipis=nsnp=VsVpnsnp=14Ratio of primary to secondary turnsnpns=41

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