1. | \(1\) V | 2. | \(2.1\) V |
3. | \(3.1\) V | 4. | Zero |
1. | the stopping potential will be \(0.2\) volts. |
2. | the stopping potential will be \(0.6\) volts. |
3. | the saturation current will be \(6\) mA. |
4. | the saturation current will be \(18\) mA. |
1. | 2. | ||
3. | 4. |
1. | \(A\) | 2. | \(B\) |
3. | \(C\) | 4. | None of these |
If alpha, beta and gamma rays carry the same momentum, which has the longest wavelength?
1. | Alpha rays | 2. | Beta rays |
3. | Gamma rays | 4. | None, all have same wavelength |
1. | decrease by \(2\) times |
2. | decrease by \(4\) times |
3. | increase by \(4\) times |
4. | increase by \(2\) times |
1. | \(1.00\) | 2. | \(1.02\) |
3. | \(1.04\) | 4. | \(0.98\) |
In an experiment of the photoelectric effect, the wavelength of incident radiation is . The wavelength of incident radiation is reduced to rd of initial value and the maximum kinetic energy of photoelectron is observed to be n times the previous value. What will be the threshold wavelength for the metal plate?
1. | \(\dfrac{n-1}{n-3} \lambda \) | 2. | \(\dfrac{n}{n-3} \lambda \) |
3. | \(\dfrac{n-3}{n-1} \lambda \) | 4. | \(\dfrac{n+1}{n-3} \lambda\) |