1. | 2. | ||
3. | 4. |
The value of stopping potential in the following diagram is given by:
1. | \(-4\) V | 2. | \(-3\) V |
3. | \(-2\) V | 4. | \(-1\) V |
1. | Curves \(a\) and \(b\) represent incident radiations of different frequencies and different intensities. |
2. | Curves \(a\) and \(b\) represent incident radiation of the same frequency but of different intensities. |
3. | Curves \(b\) and \(c\) represent incident radiation of different frequencies and different intensities. |
4. | Curves \(b\) and \(c\) represent incident radiations of the same frequency having the same intensity. |
1. | \(N\) and \(2T\) | 2. | \(2N\) and \(T\) |
3. | \(2N\) and \(2T\) | 4. | \(N\) and \(T\) |
The number of photo-electrons emitted per second from a metal surface increases when:
1. | The energy of incident photons increases. | 2. | The frequency of incident light increases. |
3. | The wavelength of the incident light increases. | 4. | The intensity of the incident light increases. |
1. | 2. | ||
3. | 4. |
The stopping potential as a function of the frequency of the incident radiation is plotted for two different photoelectric surfaces \(A\) and \(B\). The graphs demonstrate that \(A\)'s work function is:
1. | Greater than that of \(B\). | 2. | Smaller than that of \(B\). |
3. | Equal to that of \(B\). | 4. | No inference can be drawn about their work functions from the given graphs. |
1. | 2. | ||
3. | 4. |
1. | 2. | ||
3. | 4. |
The figure shows different graphs between stopping potential \(V_0\) and frequency (\(\nu\)) for the photosensitive surfaces of cesium, potassium, sodium and lithium. The plots are parallel.
1. | Cesium |
2. | Potassium |
3. | Sodium |
4. | Lithium |
1. | (i) > (ii) > (iii) > (iv) | 2. | (i) > (iii) > (ii) > (iv) |
3. | (iv) > (iii) > (ii) > (i) | 4. | (i) = (iii) > (ii) = (iv) |