NEET Physics: Questions 1807 - 1811 of 2099
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Read the passage given below and answer the questions that follow:
Consider a block of conducting material of resistivity ′ ρ ′ shown in the figure. Current I enter at ‘A’ and leaves from ‘D’. We apply superposition principle to find voltage ∆ V’ developed between ‘B’ and ‘C’. The calculation is done in the following steps:
(i) Take current T entering from ‘A’ and assume it to spread over a hemispherical surface in the block
(ii) Calculate field E (r) at distance ‘r’ from A by using Ohm’s law E = ρ j, where j is the current per unit area at ‘r’.
(iii) From the V dependence of E (r), obtain the potential V (r) at r.
(iv) Repeat (i), (ii) and (iii) for current
Question number: 1807 (2 of 2 Based on Passage) Show Passage
Question number: 1808
Question number: 1809
Question number: 1810
Question number: 1811
An open organ pipe is in resonance in its 2 nd harmonic with tuning fork of frequency f 1 now; it is closed at one end. If the frequency of the tuning fork is increased slowly from f l then again a resonance is obtained with a frequency f 2. If in this case the pipe vibrates n th harmonics then