Day 538: JEE Mains Physics

1. A.
   increases the number of photons incident and also increases the K.E. of the ejected electrons
2. B.
   increases the frequency of photons incident and increases the K.E. of the ejected electrons.
3. C.
   increases the frequency of photons incident and the K.E. of the ejected electrons remains unchanged
4. D.
   increases the number of photons incident and the K.E. of the ejected electrons remains unchanged

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1. A.
   $\frac{1}{4}\text{ }V$
2. B.
   $\frac{2}{5}\text{ }V$
3. C.
   $\frac{3}{4}\text{ }V$
4. D.
   1 V

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1. A.
   $P_{1} > P_{2}$
2. B.
   $P_{1} < P_{2}$
3. C.
   $P_{1} = P_{2}$
4. D.
   Insufficient data to draw any conclusion

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1. A.
   0.60
2. B.
   0.25
3. C.
   0.75
4. D.
   0.50

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1. A.
   $3.8 \times 10^{- 11}\text{ }N$
2. B.
   $3.9 \times 10^{- 10}\text{ }N$
3. C.
   $1.8 \times 10^{- 10}\text{ }N$
4. D.
   $5.8 \times 10^{- 10}\text{ }N$

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