Download App

Moving Charges and Magnetism — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsMoving Charges and Magnetism1 Mark
MCQ
A charged particle moves through a magnetic field perpendicular to its direction. Then:
  • A
    Kinetic energy changes, but the momentum is constant.
  • ✓
    The momentum changes, but the kinetic energy is constant.
  • C
    Both momentum and kinetic energy of the particle are not constant.
  • D
    Both momentum and kinetic energy of the particle are constant.
✓

Answer

Correct option: B.
The momentum changes, but the kinetic energy is constant.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from Moving Charges and Magnetism→Moving Charges and Magnetism — all question types→Physics STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

The resistance of the filament of an electric bulb changes with temperature. If an electric bulb rated $220\, volt$ and $100\, watt$ is connected $(220 \times 0.8)$ $volt$ sources, then the actual power would be
→
A varying current in a coil changes from $10\, amp$ to zero in $0.5 \,sec$. If average $EMF$ is induced in the coil is $220 \,volts$, the self inductance of coil is....$H$
→
The dipole moment of a circular loop carrying a current $I$, is $m$ and the magnetic field at the centre of the loop is $B_1$ . When the dipole moment is doubled by keeping the current constant, the magnetic field at the centre of the loop is $B_2$ . The ratio $\frac{{{B_1}}}{{{B_2}}}$ is
→
In a thin spherical fish bowl of radius $10 \,cm$ filled with water of refractive index $\left( {\mu = \frac{4}{3}} \right)$ there is a small fish at a distance of $4\, cm$ from the centre as shown in figure. Where will the image of fish appears, if seen from $F$.....$cm$
→
Light from sodium lamp is passed through cold sodium vapours, the spectrum of transmitted light consists of
→
What will be the angular momentum of a electron, if energy of this electron in H-atom is 1.5eV (in J-sec)
→
A battery of $6\, volts$ is connected to the terminals of a three meter long wire of uniform thickness and resistance of the order of $100\,\Omega $. The difference of potential between two points separated by $50\,cm$ on the wire will be .......... $V$
→
A convex lens of focal length $20\,cm$ is placed in front of convex mirror with principal axis coinciding each other. The distance between the lens and mirror is $10\,cm$. A point object is placed on principal axis at a distance of $60\,cm$ from the convex lens. The image formed by combination coincides the object itself. The focal length of the convex mirror is $...cm$.
→
A circular loop of area $0.001$m$^2$ carrying a current of 10 A, is held perpendicular to a magnetic field of intensity 0.1T. The torque acting on the loop is
→
In the following $'I'$ refers to current and other symbols have their usual meaning, Choose the option that corresponds to the dimensions of electrical conductivity
→