We can charge a metal sphere positively without touching it by:
1. Conduction
2. Induction
3. Friction
4. Both (1) and (2)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIf \(10^9\) electrons move out of a body to another body every second, how much time approximately is required to get a total charge of \(1\) C on the other body?
1. \(200\) years
2. \(100\) years
3. \(150\) years
4. \(250\) years
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe amount of positive and negative charges in a cup of water (\(250\) g) are respectively:
1. | \(1.6 \times10^9\) C, \(1.4 \times10^9\) C |
2. | \(1.4 \times10^9\) C, \(1.6 \times10^9\) C |
3. | \(1.34 \times10^7\) C, \(1.34 \times10^7\) C |
4. | \(1.6 \times10^8\) C, \(1.6 \times10^7\) C |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology