Electric field intensity at a point due to an infinite sheet of charge having surface charge density \$\sigma \$ is \$E\$. If the sheet were conducting, electric intensity would be

Normal sheetApply gauss theorem\$E\cdot (2\cdot A)=\dfrac {A\cdot \sigma}{\varepsilon_0}\$\$E=\dfrac {\sigma}{2\varepsilon_0}\$Conducting sheetWe know inside a conductor E is zero.\$\therefore E\cdot (A)=\dfrac {A\cdot \sigma}{\varepsilon_0}\$\$E=\dfrac {\sigma}{\varepsilon_0}\$\$\therefore E_{conducting}=2 E_{normal sheet}\$

An infinite plane sheet of a metal is charged to charge density \$\sigma\ C/m^{2}\$ in a medium of dielectric constant K. Intensity of electric field near the metallic surface will be :

We know inside a conductor \$E=0\$\$\therefore \$ applying gauss law we get\$E\times A=\dfrac {\sigma \times A}{K{\varepsilon_0}}\$\$E=\dfrac {\sigma}{K{\varepsilon_0}}\$

Two thin infinite parallel sheets have uniform surface densities of charge \$+\sigma\$ and \$-\sigma .\$ The value of \$E\$ in the space outside the sheets is:

The Electric field in outside region is zero as the electric fields due to the two sheets cancel out each other. If the two sheets have equal and opposite uniform surface densities of charge i.e., σ1 = σ and σ2 = – σ. Then the electric field outside the sheet is zero.

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Electric Charges And Fields

Q: Complete the following statements with an appropriate word /term be filled in the blank space(s).The force of attraction or repulsion between two charges is given by ......................

Coulomb's law: The force exerted by one point charge is proportional to the product of the charge and varies inversely as the sure of the distance separating the charges.

Q: True Or False?1)A proton repels an electron.2)An electron repels a proton.

The above statement is false. Unlike charges attract each other. A proton attracts an electron.

Q: If the flux of the electric field through a closed surface is zero:

Gauss law:\$\phi=\$\$\oint E\cdot da=\dfrac {q_{enclosed}}{\varepsilon_0}\$Given that the flux through the closed surface is zero.\$\therefore q_{enclosed}=0\$

Q: Number of electric lines of force emanating from \$1C\$ of positive charge in vacuum is :

\$\phi \$ from \$1C \$ of charge is \$= \dfrac{Q_{enclosed}}{\epsilon_o}\$\$= \dfrac{1}{8.8501\times 10^{-12}}\$\$= 1.129\times 10^{11}\$

Q: \$Debye\$ is the unit of:

The \$debye\$ (\$D\$) is the CGS unit of electric dipole moment (\$= V\times d\$)\$1\ debye=1 \times 10^{-18}\ statcoulomb.cm\$

Q: What is the nature of electric charge?

Electric charge is the physical property of matter that causes it to experience a force when placed in an electromagnetic field. There are two types of electric charges: positive and negative. Positively charged substances are repelled from other positively charged substances, but attracted to negatively charged substances; negatively charged substances are repelled from negative and attracted to positive. An object is negatively charged if it has an excess of electrons, and is otherwise positively charged or uncharged. The SI derived unit of electric charge is the coulomb (C).Hence, Electric charge is of two types viz, positive and negative charge.

Physics
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JEE Mains JEE Advanced AIIMS BITSAT Easy Qs Med Qs Hard Qs

Complete the following statements with an appropriate word /term be filled in the blank space(s).

The force of attraction or repulsion between two charges is given by ......................

Gauss's law

Kepler's law

Coulomb's law

Gravitational law

Easy

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True Or False?
1)A proton repels an electron.
2)An electron repels a proton.

False, False

True, True

True, False

False, True.

Easy

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If the flux of the electric field through a closed surface is zero:

the electric field must be zero everywhere on the surface

the electric field must not be zero everywhere on the surface

the charge inside the surface must be zero

the charge in the vicinity of the surface must be zero

Easy

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Electric field intensity at a point due to an infinite sheet of charge having surface charge density $σ$ is $E$ . If the sheet were conducting, electric intensity would be

\frac{E}{2}

E

2 E

4 E

Easy

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Number of electric lines of force emanating from $1 C$ of positive charge in vacuum is :

8.85 \times 1 0^{- 12}

9 \times 1 0^{9}

1 / 4 π \times 9 \times 1 0^{9}

1.13 \times 1 0^{11}

Easy

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An infinite plane sheet of a metal is charged to charge density $σ C / m^{2}$ in a medium of dielectric constant K. Intensity of electric field near the metallic surface will be :

E = \frac{σ}{ε _{_{0}} K}

E = \frac{σ}{2 ε _{_{0}}}

E = \frac{σ}{2 ε _{_{0}} K}

E = \frac{K σ}{2 ε _{_{0}}}

Easy

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When we remove polyester or woollen clothes in dark, we can see a spark and hear a crackling sound. Which of the following is responsible for it?

Static electricity.

Current electricity.

Reflection of light.

Refraction of light.

Easy

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Two thin infinite parallel sheets have uniform surface densities of charge $+ σ$ and $- σ .$ The value of $E$ in the space outside the sheets is:

\frac{σ}{ϵ _{0}}

\frac{σ}{2 ϵ _{0}}

zero

\frac{2 σ}{ϵ _{0}}

Easy

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$D e b y e$ is the unit of:

electric flux

electric dipole moment

electric potential

electric field intensity

Easy

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What is the nature of electric charge?

only positive

only negative

positive and negative both

neutral.

Easy

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Electric Charges And Fields

Physics 5006 Views

Complete the following statements with an appropriate word /term be filled in the blank space(s). The force of attraction or repulsion between two charges is given by ......................

True Or False? 1)A proton repels an electron. 2)An electron repels a proton.

If the flux of the electric field through a closed surface is zero:

Electric field intensity at a point due to an infinite sheet of charge having surface charge density σ is E. If the sheet were conducting, electric intensity would be

Number of electric lines of force emanating from 1C of positive charge in vacuum is :

An infinite plane sheet of a metal is charged to charge density σ C/m2 in a medium of dielectric constant K. Intensity of electric field near the metallic surface will be :

When we remove polyester or woollen clothes in dark, we can see a spark and hear a crackling sound. Which of the following is responsible for it?

Two thin infinite parallel sheets have uniform surface densities of charge +σ and −σ. The value of E in the space outside the sheets is:

Debye is the unit of:

What is the nature of electric charge?

Physics
5006 Views

Complete the following statements with an appropriate word /term be filled in the blank space(s).

The force of attraction or repulsion between two charges is given by ......................

True Or False?
1)A proton repels an electron.
2)An electron repels a proton.

Electric field intensity at a point due to an infinite sheet of charge having surface charge density $σ$ is $E$ . If the sheet were conducting, electric intensity would be

Number of electric lines of force emanating from $1 C$ of positive charge in vacuum is :

An infinite plane sheet of a metal is charged to charge density $σ C / m^{2}$ in a medium of dielectric constant K. Intensity of electric field near the metallic surface will be :

Two thin infinite parallel sheets have uniform surface densities of charge $+ σ$ and $- σ .$ The value of $E$ in the space outside the sheets is:

$D e b y e$ is the unit of: