- AElectromagnetic waves
- BMechanical waves
- CEither mechanical or electromagnetic waves
- DNeither mechanical nor electromagnetic waves
Explanation:
Matter waves are waves associated with every moving particle and therefore are neither mechanical nor electromagnetic waves.
These waves have
$\lambda$ = h × p
Where $\lambda$ is the wavelength, h is plank's constant, and p is the particle’s moment.
Therefore, matter waves are neither mechanical nor electromagnetic waves.
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If a magnetic substance is kept in a magnetic field, then which of the following is thrown out
|
(a) Paramagnetic |
(b) Ferromagnetic |
(c) Diamagnetic |
(d) Antiferromagnetic |
A hydrogen like atom of atomic number Z is in an excited state of quantum number 2n. It can emit a maximum energy photon of 204 eV. If it makes a transition to quantum state n, a photon of energy 40.8 eV is emitted. The value of n will be
|
(a) 1 |
(b) 2 |
(c) 3 |
(d) 4 |
Two resistances are connected in two gaps of a metre bridge. The balance point is 20 cm from the zero end. A resistance of 15 ohms is connected in series with the smaller of the two. The null point shifts to 40 cm. The value of the smaller resistance in ohms is
|
(a) 3 |
(b) 6 |
(c) 9 |
(d) 12 |
The refractive indices of water and glass with respect to air are 1.2 and 1.5 respectively. The refractive index of glass with respect to water is
|
(a) 0.6 |
(b) 0.8 |
(c) 1.25 |
(d) 1.75 |
