AP EAMCET · PHYSICS · Magnetic Effects of Current
The magnetic field at a distance of 10 cm from a long straight thin wire carrying a current of 4 A is
- A \(6 \mu \mathrm{~T}\)
- B \(16 \mu \mathrm{~T}\)
- C \(8 \mu \mathrm{~T}\)
- D \(4 \mu \mathrm{~T}\)
Answer & Solution
Correct Answer
(C) \(8 \mu \mathrm{~T}\)
Step-by-step Solution
Detailed explanation
\( B = \frac{\mu_0 I}{2 \pi r} \) \( B = \frac{(4\pi \times 10^{-7} \text{ T}\cdot\text{m/A})(4 \text{ A})}{2 \pi (0.1 \text{ m})} \) \( B = 8 \times 10^{-6} \text{ T} = 8 \mu \text{T} \)
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 a spring block system as shown in figure, if the spring constant \(\mathrm{K}=9 \pi^2 \mathrm{Nm}^{-1}\), then the time period of oscillation is
AP EAMCET 2024 Medium - A bus moving on a level road with a velocity \(v\) can be stopped at a distance of \(x\), by the application of a retarding force \(F\). The load on the bus is increased by \(25 \%\) by boarding the passengers. Now, if the bus is moving with the same speed and if the same retarding force is applied, the distance travelled by the bus before it stops isAP EAMCET 2014 Hard
- A mass \(M\) attached to a horizontal spring executes simple harmonic motion with amplitude \(A_1\). When mass \(M\) passes mean position then a smaller mass \(m\) is attached to it and both of them together executing simple harmonic motion with amplitude \(A_2\). Then the value of \(\frac{A_1}{A_2}\) isAP EAMCET 2024 Easy
- Two resistances of \(400 \Omega\) and \(800 \Omega\) are connected in series with \(6 \mathrm{~V}\) battery of negligible internal resistance. A voltmeter of resistance \(10000 \Omega\) is used to measure the potential difference across \(400 \Omega\). The error in the measurement of potential difference in volts approximately is :AP EAMCET 2003 Medium
- The position of the direct image obtained at , when a monochromatic beam of light is passed through a plane transmission grating at normal incidence is shown in figure. The diffracted images and correspond to the first, second and third order diffraction. When the source is replaced by another source of shorter wavelength
AP EAMCET 2021 Hard - A thin hollow sphere of mass \(m\) is completely filled with a liquid of mass \(m\). When the sphere rolls with a velocity \(v\), kinetic energy of the system is (neglect friction)AP EAMCET 2011 Easy
More PYQs from AP EAMCET
- An object requires \(500 \mathrm{~N}\) force to be pulled up on a \(30^{\circ}\) frictionless smooth inclined plane at a constant speed. The weight of the object isAP EAMCET 2022 Medium
- Out of first 5 consecutive natural numbers, if two different numbers x and y are chosen at random, then the probability that \(x^4-y^4\) is divisible by 5 isAP EAMCET 2024 Easy
- The following four wires are made of the same material. If same tension is applied to each, the wire having largest extension isAP EAMCET 2019 Easy
- The maximum amplitude of an AM wave is found to be \(20 \mathrm{~V}\) while its minimum amplitude is \(4 \mathrm{~V}\). The modulation index isAP EAMCET 2022 Medium
- If \(\cos (f(x))=\frac{1-x^2}{1+x^2}\) and \(\tan (g(x))=\frac{3 x-x^3}{1-3 x^2}\), then \(\frac{d f}{d g}=\)AP EAMCET 2019 Medium
- If aqueous solution contains \(9 \%\) and \(1 \%\) \((w / w)\) of two non-volatile non-electrolytes \(X\) (molecular weight 180) and \(Y\) (molecular weight 50) respectively, the boiling point of solution in \({ }^{\circ} \mathrm{C}\) approximately is \(\left(K_b=0.52 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}\right)\)AP EAMCET 2019 Hard