- 1(current)
Q. No.A transformer is used to light a \(100~\text{W}\) and \(110~\text{V}\) lamp from a \(220~\text{V}\) main. If the main current is \(0.5~\text{A}\), the efficiency of the transformer is approximately:
1. \(30\%\)
2. \(50\%\)
3. \(90\%\)
4. \(10\%\)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology
1. \(2\) A
2. \(2\sqrt2\) A
3. \(\sqrt2\) A
4. zero
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology| 1. | \(20~\mathrm{V}\) and \(2.0~\mathrm{mA}\) |
| 2. | \(10~\mathrm{V}\) and \(0.5~\mathrm{mA}\) |
| 3. | zero and therefore no current |
| 4. | \(20~\mathrm{V}\) and \(0.5~\mathrm{mA}\) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology1. \(0.37~\text{A}\)
2. \(0.27~\text{A}\)
3. \(2.7~\text{A}\)
4. \(3.7~\text{A}\)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology- 1(current)
Q. No.
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