Question
Define electric flux.
✓
Answer
The electric flux $\overrightarrow{\Delta S}$ passing through an area element $\Delta \phi$ is detined as follows :
$ \Delta \phi=\vec{E} \cdot \overrightarrow{\Delta S}=E \Delta S \cos \theta $
Here, $\theta$ is the angle between the area element $\overrightarrow{\Delta S}$ and $\overrightarrow{ E }$
$ \Delta \phi=\vec{E} \cdot \overrightarrow{\Delta S}=E \Delta S \cos \theta $
Here, $\theta$ is the angle between the area element $\overrightarrow{\Delta S}$ and $\overrightarrow{ E }$
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
Write corresponding values for X and Y on decreasing the length to half of conductors X and Y where $X =4$ and $Y =4 \Omega$ and $Y =48 \times 10^{-8} \Omega m$.
→shows a capacitor made of two circular plates each of radius 12 cm, and separated by 5.0 cm. The capacitor is being charged by an external source (not shown in the figure). The charging current is constant and equal to 0.15A.
- Calculate the capacitance and the rate of charge of potential difference between the plates.
- Obtain the displacement current across the plates.
- Is Kirchhoff’s first rule (junction rule) valid at each plate of the capacitor? Explain.
A current $\text{i}_1=\text{i}_0\sin\omega\text{t}$ passes through a resistor of resistance R. How much thermal energy is produced in one time period? A current $\text{i}_2=-\text{i}_0\sin\omega\text{t}$ passes through the resistor. How much thermal energy is produced in one time period? If $i_1$, and $i_2$ both pass through the resistor simultaneously, how much thermal energy is produced? Is the principle of superposition obeyed in this case?
→Can a solid conducting sphere of the same radius be charged more than a hollow sphere? Give the reason also.
What is meant by dielectric? Which is the dielectric among silicon, mica and carbon?
Which is more dangerous ac current or de current of same voltage?
Answer the following question:
An electron travelling west to east enters a chamber having a uniform electrostatic field in north to south direction. Specify the direction in which a uniform magnetic field should be set up to prevent the electron from deflecting from its straight line path.
An electron travelling west to east enters a chamber having a uniform electrostatic field in north to south direction. Specify the direction in which a uniform magnetic field should be set up to prevent the electron from deflecting from its straight line path.
What is the value of inductive reactance in. pure inductor de circuit?
What is the magnitude of magnetic field at the center of a long hollow current carrying tube of copper?
What is find by using the Huygens' principle?