NEET · Physics · STD 12 - 4. Moving charges and magnetism
A long solenoid of radius \(1\,mm\) has \(100 \)turns per \(mm\). If \(1\,A\) current flows in the solenoid, the magnetic field strength at the centre of the solenoid is:
- A \(12.56 \times 10^{-2}\,T\)
- B \(12.56 \times 10^{-4}\,T\)
- C \(6.28 \times 10^{-4}\,T\)
- D \(6.28 \times 10^{-2}\,T\)
Answer & Solution
Correct Answer
(A) \(12.56 \times 10^{-2}\,T\)
Step-by-step Solution
Detailed explanation
\(B =\mu_{0} ni =\mu_{0} \frac{ N }{\ell} i\) \(\therefore B =4 \pi \times 10^{-7} \times \frac{100}{10^{-3}} \times 1=12.56 \times 10^{-2} T\)
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
- In the above diagram, a strong bar magnet is moving towards solenoid-\(2\) from solenoid-\(1\). The direction of induced current in solenoid-\(1\) and that in solenoid-\(2\), respectively, are through the directions:
NEET 2024 Medium - A metallic bar of Young's modulus, \(0.5 \times 10^{11} \mathrm{~N} \mathrm{~m}^{-2}\) and coefficient of linear thermal expansion \(10^{-5}{ }^{\circ} \mathrm{C}^{-1}\), length \(1 \mathrm{~m}\) and area of cross-section \(10^{-3} \mathrm{~m}^2\) is heated from \(0^{\circ} \mathrm{C}\) to \(100^{\circ} \mathrm{C}\) without expansion or bending. The compressive force developed in it is :NEET 2024 Medium
- A student measured the diameter of a small steel ball using a screw gauge of least count \(0.001\, cm.\) The main scale reading is \(5\, mm\) and zero of circular scale division coincides with \(25\) divisions above the reference level. If screw gauge has a zero error of \(-0.004 \,cm,\) the correct diameter of the ball isNEET 2018 Medium
- A spherical conductor of radius \(10\, cm\) has a charge of \(3.2 \times 10^{-7} \,C\) distributed uniformly. What is the magnitude of electric field at a point \(15 \,cm\) from the centre of the sphere? \(\left(\frac{1}{4 \pi \epsilon_{0}}=9 \times 10^{9} Nm ^{2} / C ^{2}\right)\)NEET 2020 Medium
- Two bodies of mass \(4 \,kg\) and \(6\, kg\) are tied to the ends of a massless string. The string passes over a pulley which is frictionless (see figure). The acceleration of the system in terms of acceleration due to gravity \((g)\) is
NEET 2020 Medium - Imagine earth to be a solid sphece of mass \(M\) and radius \(R\). If the value of acceleration due to gravity at a depth d below earth's surface is same as its value at a height \(h\) above its surface and equal to \(\frac{g}{4}\) (where \(g\) is the value of acceleration due to gravity on the surface of earth), the ratio of \(\frac{h}{d}\) will beNEET 2017 Medium
More PYQs from NEET
- Given below is the representation of the extent of global diversity of invertebrates. What groups the four portions \((A-D)\) represent respectively?
NEET 2014 Medium - The Brewsters angle \({i }_{b}\) for an interface should beNEET 2020 Medium
- Which part of the brain is responsible for thermoregulation?NEET 2019 Medium
- Which of the following statements is incorrect?NEET 2019 Easy
- A body of mass \(m \) is attached to the lower end of a spring whose upper end is fixed. The spring has negligible mass. When the mass \(m\) is slightly pulled down and released , it oscillates with a time period of \(3\,s\) . When the mass \(m\) is increased by \(1\,kg\) , the time period of oscillations becomes \(5\,s\) . The value of \(m\) in \(kg\) isNEET 2016 Medium
- What happens to the mass number and atomic number of an element when it emits \(\gamma\)-radiation?NEET 2020 Easy