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Physics - Sound Wave Question with Solution | TestHub

PhysicsSound WaveMiscellaneousEasy2 minPYQ_2010

PhysicsEasysingle choice

In space charge limited region, the plate current ina diode is $10 mA$ for plate voltage $150 V$ . If the plate voltagte is increased to $600 V$ , then the plate current will be

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Solution:

In space charge limited region, the plate current is given by Child's law $i_{p} = K V_{p}^{3/2}$ Thus, $\frac{i _{p 2}}{i _{p 1}} = (\frac{V _{p 2}}{V _{p 1}})^{3/2} = (\frac{600}{150})^{3/2} = (4)^{3/2} = 8$ or, $i_{p 2} = i_{p 1} \times 8 = 10 \times 8 mA = 80 mA$ ...(i)

Stream:VITEEESubject:PhysicsTopic:Sound WaveSubtopic:Miscellaneous

⏱ 2mℹ️ Source: PYQ_2010

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