- 1(current)
Q. No.1. \(300\) V, \(15\) A
2. \(450\) V, \(15\) A
3. \(450\) V, \(13.5\) A
4. \(600\) V, \(15\) A
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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 & BiologyA \(220\) V input is supplied to a transformer. The output circuit draws a current of \(2.0\) A at \(440\) V. If the efficiency of the transformer is \(80\)%, the current drawn by the primary windings of the transformer is:
1. \(3.6\) A
2. \(2.8\) A
3. \(2.5\) A
4. \(5.0\) A
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA 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 & BiologyThe core of a transformer is laminated so that:
| 1. | energy losses due to eddy currents may be minimized |
| 2. | the weight of the transformer may be reduced |
| 3. | rusting of the core may be prevented |
| 4. | the ratio of voltage in primary and secondary may be increased |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology- 1(current)
Q. No.
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