MHT CET · Physics · Magnetic Properties of Matter
A magnetic intensity of \(500 \mathrm{~A} / \mathrm{m}\), produces a magnetic flux of \(2.4 \times 10^{-5} . \mathrm{Wb}\) in an iron bar of cross-sectional area \(0.4 \mathrm{~cm}^2\). The magnetic permeability of the iron bar is
- A \(2.4 \times 10^{-3} \mathrm{~N} / \mathrm{m}^2\)
- B \(1.2 \times 10^{-3} \mathrm{~N} / \mathrm{m}^2\)
- C \(2.4 \times 10^{-4} \mathrm{~N} / \mathrm{m}^2\)
- D \(1.2 \times 10^{-4} \mathrm{~N} / \mathrm{m}^2\)
Answer & Solution
Correct Answer
(B) \(1.2 \times 10^{-3} \mathrm{~N} / \mathrm{m}^2\)
Step-by-step Solution
Detailed explanation
Permeability of iron bar,
\(\mu=\frac{B}{H}=\frac{(\phi / \mathrm{A})}{\mathrm{H}}=\frac{\phi}{\mathrm{HA}}=\frac{2.4 \times 10^{-5}}{500 \times\left(0.4 \times 10^{-4}\right)}\)
\(\therefore \mu =1.2 \times 10^{-3} \mathrm{~N} / \mathrm{m}^2\)
\(\mu=\frac{B}{H}=\frac{(\phi / \mathrm{A})}{\mathrm{H}}=\frac{\phi}{\mathrm{HA}}=\frac{2.4 \times 10^{-5}}{500 \times\left(0.4 \times 10^{-4}\right)}\)
\(\therefore \mu =1.2 \times 10^{-3} \mathrm{~N} / \mathrm{m}^2\)
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
- The length of the seconds pendulum is decreased by \(0.3 \mathrm{~cm}\) when it is shifted from
place A to place B. If the acceleration due to gravity at place \(\mathrm{A}\) is \(981 \mathrm{~cm} / \mathrm{s}^{2}\), the
acceleration due to gravity at place \(\mathrm{B}\) is \(\left(\right.\) Take \(\pi^{2}=10\) )MHT CET 2020 Medium - A body performing uniform circular motion of radius ' \(R\) ' has frequency ' \(n\) '. Its centripetal acceleration isMHT CET 2020 Medium
- A projectile thrown from the ground has initial speed ' \(u\) ' and its direction makes an angle ' \(q\) ' with the horizontal. If at maximum height from ground, the speed of projectile is half its initial speed of projection, then the maximum height reached by the projectile is
\(\text {[g }=\text { acceleration due to gravity, } \sin 30^{\circ}=\cos 60^{\circ}\) \(=0.5,\) \(\cos 30^{\circ}=\sin 60^{\circ}=\sqrt{3} / 2]\)MHT CET 2021 Medium - The errors in the measurement of mass and length of the cube is \(1.5 \%\) and \(2 \cdot 5 \%\)
respectively. The percentage error in the measurement of density of a cube isMHT CET 2020 Easy - Inductance of solenoid ' \(L\) ' having diameter ' \(d\) '. Let \(n\) be the number of turns per unit length. The inductance per length near the middle of a solenoid is (Asume that current passes through the turns, \(\mu_0=\) Permeability of vacuum)MHT CET 2022 Hard
- A body is projected vertically upwards from earth's surface. If its K.E. of projection is
equal to half of its minimum value required to escape from the gravitational
influence, then the height upto which it rises is \((\mathrm{R}=\) radius of the earth \()\)MHT CET 2020 Medium
More PYQs from MHT CET
- Which among the following salts turns blue litmus red in its aqueous solution?MHT CET 2025 Easy
- A point particle of mass 200 gram is executing S.H.M. of amplitude 0.2 m . When the particle passes through the mean position, its kinetic energy is \(16 \times 10^{-3} \mathrm{~J}\). The equation of motion of this particle is (Initial phase of oscillation \(=0^{\circ}\) )MHT CET 2025 Medium
- The value of \(\int(1-\cos x) \cdot \operatorname{cosec}^2 x \mathrm{~d} x\) isMHT CET 2023 Medium
- The current associated with an electron of charge \(e\) moving in a circular orbit of radius \(r\) with speed \(v\) around the positively charged nucleus is given byMHT CET 2022 Easy
- The number of ways in which 8 different pearls can be arranged to from a necklace isMHT CET 2021 Easy
- Which of the following hormones bind with intracellular receptors?MHT CET 2024 Medium