WBJEE · Physics · Magnetic Effects of Current
A proton of mass \(m\) moving with a speed \(v\) ( \(< < \) c. velocity of light in vacuum) completes circular orbit in time \(T\) in a uniform Whetic ficld. If the speed of the proton is increased to \(\sqrt{2}\) v, what will be time needed to plete the circular orbit?
- A \(\sqrt{T}\)
- B \(T\)
- C \(\frac{T}{\sqrt{2}}\)
- D \(\frac{T}{2}\)
Answer & Solution
Correct Answer
(B) \(T\)
Step-by-step Solution
Detailed explanation
\(\because\) When a charged particle moves at a circular path in uniform magnetic field, it time period is independent from its speed. Time period of proton will not change with change in its speed.
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
- A particle is subjected to two simple harmonic motions in the same direction having equal amplitudes and equal frequency. If the resultant amplitude is equal to the amplitude of the individual motion, the phase difference \((\delta)\) between the two motions isWBJEE 2022 Hard
- A current of 1 A is flowing along positive \(x\) -axis through a straight wire of length \(0.5 \mathrm{m}\) placed in a region of a magnetic field given by \(\mathbf{B}=(2 \mathbf{i}+4 \mathbf{j}) \mathrm{T} .\) The magnitude and the direction of the force experienced by the wire respectively areWBJEE 2013 Easy
- Find the equivalent capacitance between \(A\) and \(B\) of the following arrangement :
WBJEE 2022 Easy - A wooden block is floating on water kept in a beaker. \(40 \%\) of the block is above the water surface. Now the beaker is kept inside a lift that starts going upward with acceleration equal to \(g / 2\). The block will thenWBJEE 2014 Medium
- A charge of 0.8 coulomb is divided into two charges \(Q_{1}\) and \(Q_{2}\). These are kept at a separation of \(30 \mathrm{cm}\). The force on \(Q_{1}\) is maximum whenWBJEE 2017 Medium
- The intensity of magnetization of a bar magnet is \(5.0 \times 10^{4} \mathrm{Am}^{-1}\). The magnetic length and the area of cross-section of the magnet are \(12 \mathrm{cm}\) and \(1 \mathrm{cm}^{2}\) respectively. The magnitude of magnetic moment of this bar magnet is (in SI unit)WBJEE 2014 Easy
More PYQs from WBJEE
- Two spheres of equal masses but radii \(r_1\) and \(r_2\) are allowed to fall in a liquid of infinite column. The ratio of their terminal velocities isWBJEE 2009 Medium
- A cell of emf \(E\) is connected to a resistance \(R_{1}\) for time \(t\) and the amount of heat generated in it is \(H\). If the resistance \(R_{1}\) is replaced by another resistance \(R_{2}\) and is connected to the cell at the same time \(t,\) the amount of heat generated in \(R_{2}\) is \(4 \mathrm{H}\). Then internal resistance of the cell isWBJEE 2013 Hard
- For the function \(f(x)=e^{\cos x}\), Rolle's theorem isWBJEE 2011 Medium
- The stability of Me \(\mathcal{C}=\mathrm{CH}_{2}\) is more than that of \(\mathrm{MeCH}_{2} \mathrm{CH}=\mathrm{CH}_{2}\) due toWBJEE 2012 Medium
- The number of common tangents to the circles \(x^2+y^2-4 x-6 y-12=0, x^2+y^2+6 x+18 y+26=0\) isWBJEE 2025 Medium
- The compressibility factor for a van der Waal gas at high pressure isWBJEE 2024 Easy