________________
1h/p (p is momentum).
de-Broglie asserted that the equation is completely a general formula and applies to photons as well as other moving particles. The momentum of a particle of mass m moving with velocity v is m v. Hence, de-Broglie wavelength is given by
1 = h/m v
66
This is called de-Broglie relation. It connects the momentum, which is characteristic of the particle with the wavelength, which is characteristic of the wave.
25. (a) तरल पदार्थों में विद्युत् प्रवाह को प्रवाहित कर रासायनिक प्रभाव से 'इलेक्ट्रोलाइसिस' के द्वारा रासायनिक बेटरियों में विद्युत् उत्पन्न किया जाता है। इसे समझने के लिए देखें - Satish K. Gupta, op.cit., p. 346—
Chemecal Effect of Electric Currents
If electric current is passed through a liquid, it may or it may not allow even the passage of current through it. In fact, on the basis of their electric behaviour, the liquids may be divided into three classes: (i) The liquids which do not allow current to pass through them. For example, distilled water, vegetable oil, etc.
(ii) The liquids which allow current through them but do not dissociate into ions. For example, mercury.
(iii) The liquids which allow current through them by dissociating into ions. For exmaple, salt solutions, acids and bases. Such liquids are called electrolytes.
The process of dissociation of a liquid into ions on passing current through it is called electrolysis.
Therefore, passage of electric current through the electrolytes produces
chemical effect.
Electrolyte
The substances, which dissociate into ions and when in solution form, allow electric current to pass through them, are called electrolytes. For example, acids, bases, acidulated water, salt solution, such as copper sulphate, silver nitrate, etc.
On the basis of their behaviour towards the passage of electric current,
प्रज्ञा अंक 124
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