BITSAT 2021 | Electrostatics Question 2 | Physics

Four charges equal to + Q are placed at the four corners of a square and a charge ($$-$$q) is at its centre. If the system is in equilibrium, then the value of $$-$$q is

$$ - {Q \over 4}(1 + 2\sqrt 2 )$$

$${Q \over 2}(2\sqrt 2 + 1)$$

$${Q \over 4}(1 + 2\sqrt 2 )$$

$${Q \over 4}(1 + \sqrt 2 )$$

BITSAT 2021

MCQ (Single Correct Answer)

-1

An electric dipole is placed at an angle of 30$$^\circ$$ in a non-uniform electric field. The dipole will experience

torque only

translational force only in the direction of the field

translational force only in a direction normal to the direction of the field

torque as well as a translational force

BITSAT 2020

MCQ (Single Correct Answer)

-1

A charge +q is placed at the origin O of XY-axes as shown in the figure. The work done in taking a charge Q from A to B along the straight line AB is

BITSAT 2020 Physics - Electrostatics Question 2 English

$${{qQ} \over {4\pi {\varepsilon _0}}}\left( {{{a - b} \over {ab}}} \right)$$

$${{qQ} \over {4\pi {\varepsilon _0}}}\left( {{{b - a} \over {ab}}} \right)$$

$${{qQ} \over {4\pi {\varepsilon _0}}}\left( {{b \over {{a^2}}} - {1 \over b}} \right)$$

$${{qQ} \over {4\pi {\varepsilon _0}}}\left( {{a \over {{b^2}}} - {1 \over b}} \right)$$

BITSAT 2020

MCQ (Single Correct Answer)

-1

Two small conducting spheres of equal radius have charges +20 $$\mu$$ C and $$-$$40 $$\mu$$C respectively and placed at a distance R from each other experience for F₁. If they are brought in contact and separated to the same distance, they experience force F₂. The ratio of F₁ to F₂ is

1 : 4

+8 : 1

$$-$$8 : 1

1 : 8

BITSAT Subjects

English Proficiency

Comprehension Ability Rearrangement Fill in the Blanks Grammar Vocabulary

Logical Reasoning

Verbal

Direction Sense Test Analogy Classification Series Completion Blood Relations Logical Deduction Logic Chart

Non Verbal

Completion of Figure Figure Formation Paper Folding and Cutting Figure Matrix Rule Detection Mirror Image