NEET · Physics · STD 12 - 5. Magnetism and matter
If \(\theta _1\) and \(\theta_2\) be the apparent angles of dip observed in two vertical planes at right angles to each other, then the true angle of dip \(\theta\) is given by
- A \(\cot ^2 \theta=\cot ^2 \theta_1+\cot ^2 \theta_2\)
- B \(\tan ^2 \theta=\tan ^2 \theta_1+\tan ^2 \theta_2\)
- C \(\cot ^2 \theta=\cot ^2 \theta_1-\cot ^2 \theta_2\)
- D \(\tan ^2 \theta=\tan ^2 \theta_1-\tan ^2 \theta_2\)
Answer & Solution
Correct Answer
(A) \(\cot ^2 \theta=\cot ^2 \theta_1+\cot ^2 \theta_2\)
Step-by-step Solution
Detailed explanation
Let \(B_H\) and \(B_v\) be the horizontal and vertical components of earth's magnetic field \(\vec B\). Since \(\theta\) is the angle of dip \(\tan \theta = \frac{B_V}{B_H}\)
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 equivalent resistance between \(A\) and \(B\) for the mesh shown in the figure is ......... \(\Omega\)
NEET 2020 Medium - A microscope has an objective of focal length 2 cm , eyepiece of focal length 4 cm and the tube length of 40 cm . If the distance of distinct vision of eye is 25 cm , the magnification in the microscope is :NEET 2025 Hard
- Two particles \(A\) and \(B\) are moving in uniform circular motion in concentric cirdes of radius \(r_{A}\) and \(r_{B}\) with speed \(v_A\) and \(v_B\) respectively. The time period of rotation is the same. The ratio of angular speed of \(A\) to that of \(B\) will beNEET 2019 Medium
- An inductor \(20 \,\,mH,\) a capacitor \(50\,\, \mu F\) and a resistor \(40 \,\,\Omega\) are connected in series across a source of emf \(V = 10 \,sin \,340t.\) The power loss in A.C. circuit is......\( W\)NEET 2016 Hard
- If an electron in a hydrogen atom jumps from the \(3^{rd}\) orbit to the \(2^{nd}\) orbit, it emits a photon of wavelength \(\lambda\). when it jumps from the \(4^{th}\) orbit to the \(3^{rd}\) orbit, the corresponding wavelength of the photon will beNEET 2016 Medium
- The ratio of coulomb's electrostatic force to the gravitational force between an electron and a proton separated by some distance is \(2.4 \times 10^{39}\). The ratio of the proportionality constant, \(K=\frac{1}{4 \pi \varepsilon_0}\) to the Gravitational constant \(G\) is nearly (Given that the charge of the proton and electron each \(=1.6 \times 10^{-19}\; C\), the mass of the electron \(=9.11 \times 10^{-31}\; kg\), the mass of the proton \(=1.67 \times 10^{-27}\,kg\) ):NEET 2022 Medium
More PYQs from NEET
- The quantities of heat required to raise the temperature of two solid copper spheres of radil \(r _{1}\) and \(r _{2}\left( r _{1}=1.5 r _{2}\right)\) through \(1\;K\) are in the ratioNEET 2020 Medium
- Match List \(I\) with List \(II\).
Choose the correct answer from the options given below:List \(I\) (Spectral Lines of Hydrogen for transitions from) List \(II\) (Wavelengths (\(nm\))) \(A\) \(n_2=3 \text { to } n_1=2\) \(I\) \(410.2\) \(B\) \(n_2=4 \text { to } n_1=2\) \(II\) \(434.1\) \(C\) \(n_2=5 \text { to } n_1=2\) \(III\) \(656.3\) \(D\) \(n_2=6 \text { to } n_1=2\) \(IV\) \(486.1\) NEET 2024 Medium - The \(DNA\) present in chloroplast is:NEET 2024 Medium
- The letter \(‘D'\) in \(D-\)glucose signifiesNEET 2017 Easy
- In the given circuits \((a)\),\((b)\) and \((c)\), the potential drop across the two p-n junctions are equal in:
NEET 2022 Medium - The moment of inertia of a thin rod about an axis passing through its mid point and perpendicular to the rod is \(2400 \mathrm{~g} \mathrm{~cm}^2\). The length of the \(400 \mathrm{~g}\) rod is nearly:NEET 2024 Medium