1. | a magnet |
2. | an unmagnetised iron bar |
3. | a moving charge |
4. | stationary charge |
1. | they travel with the speed of sound. |
2. | the frequency is not constant. |
3. | they can, heavily absorbed by the atmosphere. |
4. | the height of antenna has to be increased several times. |
A | B | Y |
0 | 0 | 1 |
0 | 1 | 1 |
1 | 0 | 1 |
1 | 1 | 0 |
1. \(0.01\) m
2. \(0.02\) m
3. \(0.05\) m
4. \(0.03\) m
\(y=3\sin\pi\Big(\frac t2-\frac x4\Big),\) represents an equation of a progressive wave, where \(t\) is in second and \(x\) is in meter. The distance travelled by the wave in \(5\) seconds is:
1. \(8\) m
2. \(10\) m
3. \(5\) m
4. \(32\) m