JEE Advanced · Physics · 29. Experimental Physics
Area of the cross-section of a wire is measured using a screw gauge. The pitch of the main scale is . The circular scale has divisions and for one full rotation of the circular scale, the main scale shifts by two divisions. The measured readings are listed below.
| Measurement condition | Main scale reading | Circular scale reading |
| Two arms of gauge touching each other without wire | division | divisions |
| Attempt-: With wire | divisions | divisions |
| Attempt-: With wire | divisions | divisions |
- A
- B
- C
- D
Answer & Solution
Correct Answer
(C)
Step-by-step Solution
Detailed explanation
Note: This question is given bonus by JEE council. In one rotation 2 divisions of the main scale are crossed. Therefore, the least count of the screw gauge is
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- One mole of a monatomic ideal gas undergoes a cyclic process as shown in the figure (where V is the volume and T is the temperature). Which of the statements below is (are) true?
JEE Advanced 2018 Medium - An electric dipole is formed by two charges and located in -plane at and , respectively, as shown in the figure. The electric potential at point due to the dipole is . The charges and are then moved to the points and , respectively. What is the value of electric potential atJEE Advanced 2023 Medium
- A student is performing an experiment using a resonance column and a tuning fork of frequency \(244 s^{-1}\). He is told that the air in the tube has been replaced by another gas (assume that the column remains filled with the gas). If the minimum height at which resonance occurs is \((0.350 \pm 0.005) m\), the gas in the tube is (Useful information: \(\sqrt{167\text{ RT}}=640\text{ J}^{\frac{1}{2}}\text{ mol}^{-\frac{1}{2}} ;\) \(\sqrt{140\text{ RT}}=590\text{ J}^{\frac{1}{2}}\text{ mole}^{-\frac{1}{2}}\) . The molar masses M in grams are given in the options. Take the values of \(\sqrt{\frac{10}{\text M }}\) for each gas as given there.)JEE Advanced 2014 Easy
- Consider regular polygons with number of sides as shown in the figure. The center of mass of all the polygons is at height from the ground. They roll on a horizontal surface about the leading vertex without slipping and sliding as depicted. The maximum increase in height of the locus of the center of mass for each polygon is . Then, depends on and as
JEE Advanced 2017 Medium - A student performed the experiment to measure the speed of sound in air using resonance air-column method. Two resonances in the air-column were obtained by lowering the water level. The resonance with the shorter air-column is the first resonance and that with the longer air column is the second resonance. Then,JEE Advanced 2009 Medium
- A resistance of \(2 \Omega\) is connected across one gap of a meter-bridge (the length of the wire is \(100 \mathrm{~cm}\) ) and an unknown resistance, greater than \(2 \Omega\), is connected across the other gap. When these resistances are interchanged, the balance point shifts by \(20 \mathrm{~cm}\). Neglecting any corrections, the unknown resistance isJEE Advanced 2007 Medium
More PYQs from JEE Advanced
- Paragraph:
Read the following passage and answer the questions.
Question:
The value of \(\left[\begin{array}{lll}3 & 2 & 0\end{array}\right]\left[\begin{array}{l}3 \\ 2 \\ 0\end{array}\right]\) isJEE Advanced 2006 Easy - \[
\text { Match the statements/expressions in Column I with the open intervals in Column II. }
\]
JEE Advanced 2009 Hard - Starting at time from the origin with speed , a particle follows a two-dimensional trajectory in the plane so that its coordinates are related by the equation . The and components of its acceleration are denoted by and , respectively. ThenJEE Advanced 2020 Medium
- The straight line \(2 x-3 y=1\) divides the circular region \(x^2+y^2 \leq 6\) into two parts. If \(S=\left\{\left(2, \frac{3}{4}\right),\left(\frac{5}{2}, \frac{3}{4}\right),\left(\frac{1}{4},-\frac{1}{4}\right),\left(\frac{1}{8}, \frac{1}{4}\right)\right\}\), then the number of point(s) in \(S\) lying inside the smaller part isJEE Advanced 2011 Medium
- A series \(R\) - \(C\) circuit is connected to \(A C\) voltage source. Consider two cases; \((A)\) when \(C\) is without a dielectric medium and \((B)\) when \(C\) is filled with dielectric of constant 4. The current \(I_R\) through the resistor and voltage \(V_C\) across the capacitor are compared in the two cases. Which of the following is/are true?JEE Advanced 2011 Easy
- The given graph represent the variations of compressibility factor \((Z)=\frac{P V}{n R T}\) versus \(P\), for three real gases \(A, B\) and \(C\). Identify the only incorrect statement

JEE Advanced 2006 Medium