Two identical rectangular plane sheet \(A\) and \(B\) each of surface charge density \(\varepsilon_0~ \text{Cm}^{-2}\) are placed parallel to each other as shown in figure. The electric field at the mid point \(P\) will be: 
        
1. \(2 ~\text{NC}^{-1}\)
2. \(1~\text{NC}^{-1}\)
3. \(0.5~\text{NC}^{-1}\)
4. zero
Subtopic:  Electric Field |
 77%
From NCERT
NEET - 2024
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Match List-I with List-II: 
List-I
(Application of Gauss Law)
List-II
(Value of \(|E|\))
A. The field inside a thin shell I. \( \dfrac{\lambda}{2 \pi \varepsilon_0 r} \hat{n} \)
B. The field outside a thin shell II. \( \dfrac{q}{4 \pi \varepsilon_0 R^2} \hat{r} \)
C. The field of thin shell at the surface III. \( \dfrac{q}{4 \pi \varepsilon_0 r^2} \hat{r}\)
D. The field due to a long charged wire  IV. zero
(Here symbols have their usual meaning and \(R\) is the radius of the thin shell) 
 
Choose the correct answer from the options given below: 
1. A-IV, B-III, C-I, D-II
2. A-I, B-II, C-III, D-IV
3. A-IV, B-III, C-II, D-I
4. A-I, B-III, C-II, D-IV
Subtopic:  Gauss's Law |
 85%
From NCERT
NEET - 2024
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A particle of mass \(m\) and charge \(q\) is placed in a uniform electric field \(E\) at \(t=0~\text s.\) The kinetic energy of the particle after time \(t\) is:
1. \(\dfrac{Eqm}{t}\)
2. \(\dfrac{E^2q^2t^2}{2m}\)
3. \(\dfrac{2E^2t^2}{qm}\)
4. \(\dfrac{Eq^2m}{2t^2}\)
Subtopic:  Electric Field |
 82%
From NCERT
NEET - 2024
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A metal cube of a side \(5~\text{cm},\) is charged with \(6~\text{μC.}\) The surface charge density on the cube, is:
1. \(0.125\times10^{-3}~\text{C m}^{-2}\) 2. \(0.25\times10^{-3}~\text{C m}^{-2}\)
3. \(4\times10^{-3}~\text{C m}^{-2}\) 4. \(0.4\times10^{-3}~\text{C m}^{-2}\)
Subtopic:  Electric Charge |
From NCERT
NEET - 2024
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If \(\oint_s \vec{E} \cdot {d \vec S}=0\) over a surface, then:
1. the electric field inside the surface is necessarily uniform.
2. the number of flux lines entering the surface must be equal to the number of flux lines leaving it.
3. the magnitude of electric field on the surface is constant.
4. all the charges must necessarily be inside the surface.
Subtopic:  Gauss's Law |
 79%
From NCERT
NEET - 2023
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An electric dipole is placed at an angle of \(30^\circ\) with an electric field of intensity \(2\times 10^5 ~\text{NC}^{-1}\). It experiences a torque equal to \(4~\text{N-m}\). If the dipole length is \(2\) cm, calculate the magnitude of the charge on the dipole.
1. \(2~\text{mC}\)
2. \(8~\text{mC}\)
3. \(6~\text{mC}\)
4. \(4~\text{mC}\)
Subtopic:  Electric Dipole |
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From NCERT
NEET - 2023
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According to Gauss law of electrostatics, electric flux through a closed surface depends on:
1. the area of the surface.
2. the quantity of charges enclosed by the surface.
3. the shape of the surface.
4. the volume enclosed by the surface.
Subtopic:  Gauss's Law |
 82%
From NCERT
NEET - 2023
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A charge \(Q~\mu\text{C}\) is placed at the centre of a cube. The flux coming out from any one of its faces will be (in SI units):
1. \(\dfrac{Q}{\varepsilon_0}\times10^{-6}\) 2. \(\dfrac{2Q}{3\varepsilon_0}\times10^{-3}\)
3. \(\dfrac{Q}{6\varepsilon_0}\times10^{-3}\) 4. \(\dfrac{Q}{6\varepsilon_0}\times10^{-6} \)
Subtopic:  Gauss's Law |
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From NCERT
NEET - 2023
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Two point charges \({-q}\) and \({+q}\) are placed at a distance of \({L},\) as shown in the figure.
          
The magnitude of electric field intensity at a distance \({R}~(R \gg L )\) varies as:
1. \(\dfrac{1}{{R}^{6}}\) 2. \(\dfrac{1}{{R}^{2}}\)
3. \(\dfrac{1}{{R}^{3}}\) 4. \(\dfrac{1}{{R}^{4}}\)
Subtopic:  Electric Dipole |
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From NCERT
NEET - 2022
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Twelve point charges each of charge \(q~\text C\) are placed at the circumference of a circle of radius \(r~\text m\) with equal angular spacing. If one of the charges is removed, the net electric field (in \(\text{N/C}\)) at the centre of the circle is:
(\(\varepsilon_0 \)-permittivity of free space)

1. \(\frac{13q}{4\pi \varepsilon_0r^2}\) 2. zero
3. \(\frac{q}{4\pi \varepsilon_0r^2}\) 4. \(\frac{12q}{4\pi \varepsilon_0r^2}\)
Subtopic:  Electric Field |
 64%
From NCERT
NEET - 2022
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