Question
Under what condition the force acting on a charge moving through a uniform magnetic field is minimum?
✓
Answer
$\text{F}_\text{m}=\text{qvB}\sin\theta$; for minimum force $\sin\theta=0$.
i.e., force is minimum when charged particle moves parallel or antiparallel to the field.
i.e., force is minimum when charged particle moves parallel or antiparallel to the field.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
A point charge +Q is placed at point O as shown in the figure. Is the potential difference VA – VB positive, negative or zero?
Why, some definite lines of atomic spectrum of matter is obtained?
How does the electric field due to point charge and line charge change with distance?
Name the physical quantity whose unit is newton metre tesla ${ }^{-1}$ and whether is it scalar or vector?
→As $\text{C}=\Big(\frac{1}{\text{V}}\Big)\text{Q},$ can you say that the capacitance C is proportional to the charge Q?
→Answer the following questions:
The earth’s magnetic field varies from point to point in space. Does it also change with time? If so, on what time scale does it change appreciably?
The earth’s magnetic field varies from point to point in space. Does it also change with time? If so, on what time scale does it change appreciably?
In the given figure, magnitude of current is increasing in the wire xy from x to y . Is there any induced current in a loop placed near the wire?
What will be the magnitude of induced current in circular loop KLMN of radius $r$ if constant current of $1 A$ is passed in straight wire $P Q$ ?
→The ratio $\frac{\text{Stress}}{\text{strain}}$ remains constant for small deformation of a metal wire. When the deformation is made larger, will this ratio increase or decrease?
→Write the expression for the de Broglie wavelength associated with a charged particle having charge ‘q’ and mass ‘m’, when it is accelerated by a potential V.