Question
You are facing a circular wire carrying an electric current. The current is clockwise as seen by you. Is the field at the centre coming towards you or going away from you?
✓
Answer
According to the right-hand thumb rule, if we curl the fingers of our right hand in the direction of the current flowing, then the thumb will point in the direction of the magnetic field developed due to it and vice versa. Therefore, in this case, the field at the centre is going away from us.
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
In measuring time period of a pendulum, it is advised to measure the time between consecutive passage through the mean position in the same direction. This is said to result in better accuracy than measuring time between consecutive passage through an extreme position. Explain.
Find the equivalence between A and B in the given circuit diagram.
If the potential difference used to accelerate electrons is tripled, by what factor does de Broglie wavelength of electrons beam change?
Explain Cassegrain telescpoe with the help of figure.
The separation between the consecutive dark fringes in a Young's double slit experiment is $1.0\ mm.$ The screen is placed at a distance of $2.5m$ from the slits and the separation between the slits is $1.0\ mm.$ Calculate the wavelength of light used for the experiment.
→→
According to the classical electromagnetic theory, calculate the initial frequency of the light emitted by the electron revolving around a proton in hydrogen atom.
Two concentric spherical shells have masses $M_1, M_2$ and radii $R_1, R_2 (R_1, < R_2).$ What is the force exerted by this system on a particle of mass $m_1$ if it is placed at a distance $\frac{\text{R}_1+\text{R}_2}{2}$ from the centre?
→State the Oersted's observation.
A nucleus with mass number A=240 and BE/A = 7.6 MeV breaks into two fragments each of A = 120 with BE/A = 8.5 MeV. Calculate the released energy.