\(0^{\circ}\,C\) અને \(100^{\circ}\,C\) તાપમાને ઉદગમના છેડા વચ્યે જોડેલા વાહકમાંથી વહેતો પ્રવાહ અનુક્રમે \(2\,A\) અને \(1.2\,A\) છે.તો \(50^{\circ}\,C\) વખતે વાહકમાંથી વહેતો પ્રવાહ \(.........\times 10^2\,mA\) થશે.

A \(14\)
B \(13\)
C \(12\)
D \(15\)

Verified Solution

Answer & Solution

Correct Answer

(D) \(15\)

Step-by-step Solution

Detailed explanation

\(i_0 R_0=i_{100} R_{100} \quad\) [For same source] \(\Rightarrow 2 R_0=1.2 R_0[1+100 \alpha]\) \(\Rightarrow 1+100 \alpha=\frac{5}{3} \Rightarrow 100 \alpha=\frac{2}{3}\) \(\Rightarrow 50 \alpha=\frac{1}{3}\) \(\therefore i_{50} R_{50}=i_0 R_0\)…

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

Same subject

લીસ્ટ \(I\) સાથે લીસ્ટ \(II\) યોગ્ય રીતે જોડો.

લીસ્ટ \(I\)	લીસ્ટ \(II\)
\((A)\) યંગનો ગુણાંક \((Y)\)	\((I)\) \(\left[ M L ^{-1} T ^{-1}\right]\)
\((B)\) શ્યાનતા ગુણાંક \((\eta)\)	\((II)\) \(\left[ M L ^2 T ^{-1}\right]\)
\((C)\) પ્લાન્ક અચળાંક \((h)\)	\((III)\) \(\left[ M L ^{-1} T ^{-2}\right]\)
\((D)\) કાર્ય વિધેય \((\phi)\)	\((IV)\) \(\left[ M L ^2 T ^{-2}\right]\)

નીચે આપેલા વિકલ્પોમાંથી સાચો વિકલ્પ પસંદ કરો.

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