COMEDK · Physics · 21. Magnetic Effects of Current
A proton is moving along negative X axis. If a uniform magnetic field is applied parallel to the positive Z axis, then choose the correct answer from the following options;
1. The proton will experience magnetic force along positive Y direction and will move along a circular path in the XY plane
2. The proton will experience magnetic force along negative Y direction and will move along a circular path in the XY plane
3. The proton will experience magnetic force along positive Y direction and will move along a circular path in the XZ plane
4. The proton will experience magnetic force along negative Y direction and will move along a circular path in the XZ plane
- A 3
- B 1
- C 2
- D 4
Answer & Solution
Correct Answer
(B) 1
Step-by-step Solution
Detailed explanation
Velocity of the proton, \(\vec{v} = -v \hat{i}\) Magnetic field, \(\vec{B} = B \hat{k}\) Charge of the proton, \(q = +e\) The magnetic force experienced by the proton is given by \(\vec{F} = q(\vec{v} \times \vec{B})\) Substituting the values,…
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
- What is the maximum speed with which a vehicle can take the turn on a curved frictionless smooth road of width 4 m , without skidding, if the radius of the circular curve of the road is 9 m and the outer edge of the road above the inner edge is 40 cm high? [given \(g=\mathrm{1 0} \mathrm{ms}^{-2}\) ]COMEDK 2025 Medium
- Four masses each 2 kg are placed at the corners A, B, C, D of a mass less square frame. 40 kg mass is at the centre O of a square frame of side 0.2m. It is to be rotated about an axis passing through the centre O and perpendicular to the plane of the frame. Calculate the torque in N-m required to produce an angular acceleration of \(\dfrac{\pi}{2}\ rads^{-2}\).COMEDK 2026 Medium
- A fish in water (refractive index \(n\) ) looks at a bird vertically above in the air. If \(y\) is the height of the bird and \(x\) is the depth of the fish from the surface, then the distance of the bird as estimated by the fish isCOMEDK 2023 Easy
- The maximum kinetic energy of emitted electrons in a photoelectric effect does not depend uponCOMEDK 2018 Easy
- The difference between the apparent frequency of a source of sound as perceived by the observer during its approach and recession is \(2 \%\) of the frequency of the source. If the speed of sound in air is \(300 \mathrm{~ms}^{-1}\), then the velocity of the source isCOMEDK 2019 Hard
- If a change in current of \(0.01 \mathrm{~A}\) in one coil produces a change in magnetic flux of \(2 \times 10^{-2}\) weber in another coil, then the mutual inductance between coils isCOMEDK 2014 Easy
More PYQs from COMEDK
- Match the ions given in Column I with their characteristic properties given in Column II.
S.No. Column I S.No. Column II A \(Cr^{2+}\) P Stable in aqueous medium and has magnetic moment equal to 5.92 BM. B \(Cu^+\) Q Only stable oxidation state and does not act as reducing agent. C \(Mn^{2+}\) R Is a good reducing agent due to attainment of stable \(d^3\) configuration. D \(Sc^{3+}\) S Unstable in aqueous medium and readily disproportionates. COMEDK 2025 Medium - A solid cylinder of mass \(2 \mathrm{~kg}\) and radius \(0.2 \mathrm{~m}\) is rotating about its own axis without friction with angular velocity \(5 \mathrm{~rad} \mathrm{s}^{-1}\). A particle of mass \(1 \mathrm{~kg}\) moving with a velocity of \(5 \mathrm{~ms}^{-1}\) strikes the cylinder and sticks to it as shown in figure.
The angular velocity of the system after the particle sticks to it will beCOMEDK 2024 Medium - For a cell \(2 \mathrm{M}_{(\mathrm{S})}+\mathrm{O}_2(\mathrm{~g})+4 \mathrm{H}^{+} \rightarrow 2 \mathrm{M}^{2+}(\mathrm{aq})+2 \mathrm{H}_2 \mathrm{O}_{(\mathrm{l})}\) the \(\mathrm{E}^0\) cell \(=+1.67 \mathrm{~V}\). When \(\left[\mathrm{M}^{2+}\right]\) is \(1.0 \times 10^{-3} \mathrm{M}\) and \(\mathrm{p}\left(\mathrm{O}_2\right)\) is 0.1 atm , the EMF of the cell becomes +1.57 V . Calculate the pH of the electrochemical cell.COMEDK 2025 Medium
- For an adiabatic change in a system, the condition which is applicable isCOMEDK 2023 Easy
- If \(\sin (120-A)=\sin (120-B)\) and \(0 < A, B < \pi\) then all values of \(A\) and \(B\) are given byCOMEDK 2014 Easy
- The number of solution of \(\cos ^2 x=3-3 \sin x\) \(\forall x \in[0,2 \pi]\) isCOMEDK 2024 Easy