Which of the following statement is true - Vidyadip

MCQ

Which of the following statement is true

A
The presence of a large magnetic flux through a coil maintains a current in the coil if the circuit is continuous
B
A coil of a metal wire kept stationary in a non-uniform magnetic field has an $e.m.f.$ induced in it
C
A charged particle enters a region of uniform magnetic field at an angle of $85^\circ $ to the magnetic lines of force; the path of the particle is a circle
✓
There is no change in the energy of a charged particle moving in a magnetic field although a magnetic force is acting on it

✓

Answer

Correct option: D.

There is no change in the energy of a charged particle moving in a magnetic field although a magnetic force is acting on it

d
(d) When charged particle enters perpendicularly in a magnetic field, it moves on a circular path with a constant speed. Hence it’s kinetic energy also remains 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 4. Moving charges and magnetism→4. Moving charges and magnetism — all question types→Physics STD 12 Science question papers→CBSE Board STD 12 Science question papers→CBSE Board question paper generator→

Similar questions

If the shift of wavelength of light emitted by a star is towards violet, then this shows that star is

The electrostatic force between the metal plates of an isolated parallel plate capacitor $C$ having a charge $Q$ and area $A$, is:

For a prism of prism angle $\theta=60^{\circ}$, the refractive indices of the left half and the right half are, respectively, $n_1$ and $n_2\left(n_2 \geq n_1\right)$ as shown in the figure. The angle of incidence $i$ is chosen such that the incident light rays will have minimum deviation if $n_1=n_2=n=1.5$. For the case of unequal refractive indices, $n_1=n$ and $n_2=n+\Delta n$ (where $\Delta n \ll n$ ), the angle of emergence $e=i+\Delta e$.

Which of the following statement($s$) is (are) correct?

$(A)$ The value of $\Delta e$ (in radians) is greater than that of $\Delta n$

$(B)$ $\Delta e$ is proportional to $\Delta n$

$(C)$ $\Delta e$ lies between 2.0 and 3.0 milliradians, if $\Delta n=2.8 \times 10^{-3}$

$(D)$ $\Delta e$ lies between 1.0 and 1.6 milliradians, if $\Delta n=2.8 \times 10^{-3}$

A capacitor is connected to a $10\,V$ battery. The charge on the plates is $10\,\mu C$ when medium between plates is air. The charge on the plates become $100\,\mu C$ when space between plates is filled with oil. The dielectric constant of oil is

The equation $\text{y}=\text{A}\sin^2(\text{kx}-\omega\text{t})$ represents a wave motion with:

The magnetic induction due to an infinitely long straight wire carrying a current $i$ at a distance $r$ from wire is given by

A man is looking at a small object placed at his near point. Without altering the position of his eye or the object, he puts a simple microscope of magnifying power 5X before his eyes. The angular magnification achieved is:

A certain wire has a resistance $R$. The resistance of another wire identical with the first except having twice its diameter is

Value of refractive index for any medium is:

Given below are two statements: One is labelled as Assertion $A$ and the other is labelled as Reason $R$.

Assertion $A:$ Two metallic spheres are charged to the same potential. One of them is hollow and another is solid, and both have the same radii. Solid sphere will have lower charge than the hollow one.

Reason $R:$ Capacitance of metallic spheres depend on the radii of spheres.

In the light of the above statements, choose the correct answer from the options given below.