1. 75 V
2. 150 V
3. 100 V
4. None of these
1. unchanged
2. halved
3. doubled
4. quadrupled
Balmer gives an equation for wavelength of visible radiation of H– spectrum as \(\lambda=\frac{k n^{2}}{n^{2}-4}\). The value of k in terms of Rydberg’s constant R is
1. R
2. 4R
3. \(R \over 4\)
4. \(4 \over R\)
1. All the charged particles have the same polarity
2. The equilibrium is unstable
3. All the charged particles cannot have the same polarity
4. Both (b) and (c) are correct
Assertion (A): | Mass of moving photons varies inversely as the wavelength. |
Reason (R): | The energy of the particle = Mass × (speed of light)2. |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | (A) is false but (R) is true. |