AP EAMCET · PHYSICS · Magnetic Effects of Current
A long straight wire carrying a current of \(30 \mathrm{~A}\) is placed in an external uniform magnetic field of induction \(4 \times 10^{-4} \mathrm{~T}\). The magnetic field is acting parallel to the direction of current. The magnitude of the resultant magnetic induction in tesla at a point \(2.0 \mathrm{~cm}\) away from the wire is
\(\left(\mu_0=4 \pi \times 10^{-7} \mathrm{H} / \mathrm{m}\right)\)
- A (a) \(10^{-4}\)
- B \(3 \times 10^{-4}\)
- C \(5 \times 10^{-4}\)
- D \(6 \times 10^{-4}\)
Answer & Solution
Correct Answer
(C) \(5 \times 10^{-4}\)
Step-by-step Solution
Detailed explanation
\(i=30 \mathrm{~A}, B=4 \times 10^{-4} \mathrm{~T}\) \(r=2 \mathrm{~cm}=2 \times 10^{-2} \mathrm{~m}\) Initial magnetic field (parallel to the wire), \(B_1=4 \times 10^{-4} \mathrm{~T}\) Magnetic field produced by the straight wire,…
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
- Magnetic field at the centre of a circular loop of area \(A\) is \(B\). Then the magnetic moment of the loop is
(\(\mu_0\)-permeability of the free space)AP EAMCET 2019 Easy - Assertion (A) When a circular coil. placed in a region with its place parallel to a magnetic field, expands radially outwards, no emf is induced in it.
Reason (R) There is a constant magnet field in the perpendicular (to the plane of the coil) direction.AP EAMCET 2022 Easy - The energy of a photon is equal to the kinetic energy of a proton. If \(\lambda_1\) is the de-Broglie wavelength of a proton, \(\lambda_2\) the wavelength associated with the proton and if the energy of the photon is \(E\), then \(\left(\lambda_1 / \lambda_2\right)\) is proportional toAP EAMCET 2014 Hard
- A body is moving up an inclined plane of angle \(\theta\) with an initial kinetic energy \(E\). The coefficient of friction between the plane and the body is \(u\). The work done against friction before the body comes to rest isAP EAMCET 2002 Hard
- It is estimated that each \(\mathrm{cm}^2\) of earth receives about 2 calorie of heat energy per minute from the sun. This is called solar constant, the value of solar constant in S.I. units isAP EAMCET 2017 Easy
- The focal length of a lens of dispersive power 0.45 which should be placed in contact with a convex lens of focal length \(84 \mathrm{~cm}\) and dispersive power 0.21 to make the achromatic combination from the two lenses, in \(\mathrm{cm}\) isAP EAMCET 2011 Medium
More PYQs from AP EAMCET
- Identify the correct set of 13 th group elements which do not form amphoteric oxides?AP EAMCET 2018 Easy
- A ball is thrown upward from the top of a building at an angle of \(30^{\circ}\) to the horizontal and with an initial speed of \(20 \mathrm{~ms}^{-1}\). If the ball strikes the ground after \(3 \mathrm{~s}\). then the height of the building is
(acceleration due to gravity \(=10 \mathrm{~ms}^{-1}\) )AP EAMCET 2022 Easy - If the slope of one of the lines in the pair of lines \(8 x^2+a x y+y^2=0\) is thrice the slope of the second line, then \(a=\)AP EAMCET 2024 Easy
- The magnetic field, of a given length of wire for single turn coil, at its center is . then its value for two turns coil for the same wire isAP EAMCET 2021 Easy
- The coefficient of \(x^{50}\) in the expansion of \((1+x)^{100}+2 x(1+x)^{99}+3 x^2(1+x)^{98}+\) \(+101 x^{100}\), isAP EAMCET 2018 Medium
- If \(P_1, P_2\) and \(P_3\) are the lengths of the altitudes drawn from the vertices \(A, B\) and \(C\) of \(\triangle A B C\) respectively, then \(\frac{\cos A}{P_1}+\frac{\cos B}{P_2}+\frac{\cos C}{P_3}=\)AP EAMCET 2023 Medium