If the electric flux entering and leaving a closed surface are $\phi_1$ and $\phi_2$ respectively,then the electric charge inside the surface will be:

  • A
    $(\phi_1 + \phi_2)\varepsilon_0$
  • B
    $(\phi_2 - \phi_1)\varepsilon_0$
  • C
    $\frac{\phi_1 + \phi_2}{\varepsilon_0}$
  • D
    $\frac{\phi_2 - \phi_1}{\varepsilon_0}$

Explore More

Similar Questions

If $x$ and $y$ are acute angles such that $\cos x + \cos y = \frac{3}{2}$ and $\sin x + \sin y = \frac{3}{4}$,then $\sin(x+y)$ is equal to

Match the organism with its use in biotechnology.
$(a)$ Bacillus thuringiensis$(i)$ Cloning vector
$(b)$ Thermus aquaticus$(ii)$ Construction of first $rDNA$ molecule
$(c)$ Agrobacterium tumefaciens$(iii)$ $DNA$ polymerase
$(d)$ Salmonella typhimurium$(iv)$ Cry proteins

Select the correct option from the following:

The sensitivity of a galvanometer that measures current is decreased by $\frac{1}{40}$ times by using a shunt resistance of $10 \Omega$. Then,the value of the resistance of the galvanometer is (in $\Omega$)

Calculate the $emf$ of the cell $Cu_{(s)}|Cu^{2+}_{(aq)}||Ag^{+}_{(aq)}|Ag_{(s)}$. Given: $E_{Cu^{2+} / Cu}^0 = +0.34 \ V$,$E_{Ag^{+} / Ag}^0 = 0.80 \ V$.

If $f(x) = \begin{cases} \frac{\sin(1+[x])}{[x]}, & \text{for } [x] \neq 0 \\ 0, & \text{for } [x] = 0 \end{cases}$ where $[x]$ denotes the greatest integer not exceeding $x$,then $\lim_{x \rightarrow 0^{-}} f(x)$ is equal to

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial
For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free
For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo