Electric Field Absorb Before You Solve MCQs Electric Charges and Fields Physics NEET Practice Questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, and PDF solved with answers

Q1:

An electron falls through a distance of $1.5~\text{cm}$ in a uniform electric field of magnitude $2\times10^4~\text{N/C}$ [figure (a)]. The direction of the field is reversed keeping its magnitude unchanged and a proton falls through the same distance [figure (b)]. If $t_e$ and $t_p$ are the time of fall for electron and proton respectively, then:

1. $t_e=t_p$
2. $t_e>t_p$
3. $t_e<t_p$
4. none of these

Subtopic: Electric Field |

60%

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Q2:

Three charges

q, q, - q

$q,~q,~-q$ are placed at the three corners of an equilateral triangle

A B C

$ABC$ , of side

a .

$a.$

The mid-point of side

A B

$AB$ is

P

$P$ while the circumcenter of

A B C

$ABC$ is

O

$O$ . Let the electric field at

P

$P$ be

E_{p}

$E_p$ and that at

O

$O$ be

E_{O} .

$E_O.$
Then,

E_{O} : E_{P} =

$E_O:E_P=$

1.	$\dfrac{2}{9}$	2.	$\dfrac{4}{9}$
3.	$\dfrac{9}{2}$	4.	$\dfrac{9}{4}$

Subtopic: Electric Field |

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Q3:

The figure shows some of the electric field lines corresponding to an electric field. The figure suggests that:

1. $E_A>E_B>E_C$
2. $E_A=E_B=E_C$
3. $E_A=E_C>E_B$
4. $E_A=E_C<E_B$

Subtopic: Electric Field |

79%

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Q4:

Which of the following field configurations is/are possible?
Note:

A, B, C

$A,B,C$ are conductors. Other charges may be present in the vicinity.

1.	I, III	2.	II
3.	I, II, III	4.	none of I, II, III

Subtopic: Electric Field |

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Q5:

Identical point charges (

q

$q$ each), are placed at the eight corners of a cube of side

a .

$a.$ When one of the charges is removed, the electric field at the center becomes

E_{c} .

$E_c.$
Now, identical point charges (same magnitude

q

$q$ each), are placed at the four corners of a square of side

a .

$a.$ When one of the charges is removed, the electric field at the center becomes

E_{s} .

$E_s.$ Then,

1.	$\dfrac{E_s}{2}=\dfrac{E_C}{3}$	2.	$\dfrac{E_s}{3}=\dfrac{E_C}{2}$
3.	$\dfrac{E_s}{\sqrt2}=\dfrac{E_C}{\sqrt3}$	4.	$\dfrac{E_s}{\sqrt3}=\dfrac{E_C}{\sqrt2}$

Subtopic: Electric Field |

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Q6:

The electric field, at the centre of a square with charges placed at its four vertices as shown in the figure, is:

(k = \frac{1}{4 π ε_{0}})

$\left(k=\dfrac{1}{4\pi\varepsilon_0}\right)$

1.	zero	2.	$4\dfrac{kq}{a^2}$
3.	$2\dfrac{kq}{a^2}$	4.	$2\sqrt2\dfrac{kq}{a^2}$

Subtopic: Electric Field |

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Q7:

Four charges

q, q

$q,q$ and

- q, - q

$-q,-q$ are placed at the four vertices of a square of side

a,

$a,$ with like charges across a diagonal. The electric field at the centre of the square is:

(k = \frac{1}{4 π ε_{0}})

$\left(k=\dfrac{1}{4\pi\varepsilon_0}\right)$
1. zero

2.

\sqrt{2} \frac{k q}{a^{2}}

$\sqrt2\dfrac{kq}{a^2}$

3.

2 \frac{k q}{a^{2}}

$2\dfrac{kq}{a^2}$

4.

4 \frac{k q}{a^{2}}

$4\dfrac{kq}{a^2}$

Subtopic: Electric Field |

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