A charge \(q\) is placed in a uniform electric field \(E.\) If it is released, then the kinetic energy of the charge after travelling distance \(y\) will be:
1. | \(qEy\) | 2. | \(2qEy\) |
3. | 4. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn Millikan oil drop experiment, a charged drop falls with a terminal velocity \(v\). If an electric field \(E\) is applied vertically upwards it moves with terminal velocity \(2v\) in upward direction. If electric field reduces to \(\frac{E}{2}\) then its terminal velocity will be:
1. \(\frac{v}{2}\)
2. \(v\)
3. \(\frac{3v}{2}\)
4. \(2v\)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe electric field at centre \(O\) of a semicircle of radius \(a\) having linear charge density \(\lambda\) is given by:
1. | \(\dfrac{2\lambda}{\epsilon_0 a}\) | 2. | \(\dfrac{\lambda\pi}{\epsilon_0 a}\) |
3. | \(\dfrac{\lambda}{2\pi \epsilon_0 a}\) | 4. | \(\dfrac{\lambda}{\pi \epsilon_0 a}\) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology