1. | reactance | 2. | mobility |
3. | conductivity | 4. | conductance |
Assertion (A): | When a firecracker (rocket) explodes in mid-air, its fragments fly in such a way that they continue moving in the same path, which the firecracker would have followed, had it not exploded. |
Reason (R): | Explosion of cracker (rocket) occurs due to internal forces only and no external force acts for this explosion. |
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. |
1. | \(h\nu_0\) | 2. | \(2h\nu_0\) |
3. | \(3h\nu_0\) | 4. | \(4h\nu_0\) |
1. | a straight line | 2. | circular |
3. | elliptical | 4. | a plane |
List-I (\(x \text{-}y\) graphs) |
List-II (Situations) |
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(a) | (i) | Total mechanical energy is conserved | |
(b) | (ii) | Bob of a pendulum is oscillating under negligible air friction | |
(c) | (iii) | Restoring force of a spring | |
(d) | (iv) | Bob of a pendulum is oscillating along with air friction |
(a) | (b) | (c) | (d) | |
1. | (iv) | (ii) | (iii) | (i) |
2. | (iv) | (iii) | (ii) | (i) |
3. | (i) | (iv) | (iii) | (ii) |
4. | (iii) | (ii) | (i) | (iv) |
Statement-I: | The law of radioactive decay states that the number of nuclei undergoing the decay per unit time is inversely proportional to the total number of nuclei in the sample. |
Statement-II: | The half life of a radionuclide is the sum of the left time of all nuclei, divided by the initial concentration of the nuclei at time \(t=0.\) |
1. | Both Statement-I and Statement-II are correct. |
2. | Both Statement-I and Statement-II are incorrect. |
3. | Statement-I is correct but Statement-II is incorrect. |
4. | Statement-I is incorrect but Statement-II is correct. |