Electric Field
PHXII01:ELECTRIC CHARGES AND FIELDS

358184 In the following four situations charged particles are at equal distance from the origin. Arrange them the magnitude of the net electric field at origin greatest first
supporting img

supporting img

1 (ii) > (i) > (iii) > (iv)
2 (i) > (ii) > (iii) > (iv)
3 (iv) > (iii) > (ii) > (i)
4 (i) > (iii) > (ii) > (iv)
PHXII01:ELECTRIC CHARGES AND FIELDS

358185 Assertion :
Three equal charges are situated on a circle of radius \(r\) such that they form on equilateral triangle, then the electric field intensity at the centre is zero.
Reason :
The force on unit positive charge at the centre, due to the three equal charges are represented by the three sides of a triangle taken in the same order. Therefore, electric field intensity at centre is zero.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXII01:ELECTRIC CHARGES AND FIELDS

358186 Two charges \(Q\) and \( - 3Q\) are placed at some distance apart. If the electric field at the location of \(Q\) is \(E\) then at the locality of \( - 3Q\), it is

1 \(E/3\)
2 \(2E\)
3 \(4E/3\)
4 \(3E\)
PHXII01:ELECTRIC CHARGES AND FIELDS

358187 Two charges each of magnitude \(Q\) are fixed at each of two opposite corners of a square. Two other charges each of magnitude \(q\) are placed at each of the other two corners. If the resultant electric force on \(Q\) is zero, then \(Q\) and \(q\) are related as

1 \(Q = 2\sqrt 2 q\)
2 \(Q = - 2\sqrt 2 q\)
3 \(Q = \sqrt 2 q\)
4 \(Q = - \sqrt 2 q\)
PHXII01:ELECTRIC CHARGES AND FIELDS

358184 In the following four situations charged particles are at equal distance from the origin. Arrange them the magnitude of the net electric field at origin greatest first
supporting img

supporting img

1 (ii) > (i) > (iii) > (iv)
2 (i) > (ii) > (iii) > (iv)
3 (iv) > (iii) > (ii) > (i)
4 (i) > (iii) > (ii) > (iv)
PHXII01:ELECTRIC CHARGES AND FIELDS

358185 Assertion :
Three equal charges are situated on a circle of radius \(r\) such that they form on equilateral triangle, then the electric field intensity at the centre is zero.
Reason :
The force on unit positive charge at the centre, due to the three equal charges are represented by the three sides of a triangle taken in the same order. Therefore, electric field intensity at centre is zero.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXII01:ELECTRIC CHARGES AND FIELDS

358186 Two charges \(Q\) and \( - 3Q\) are placed at some distance apart. If the electric field at the location of \(Q\) is \(E\) then at the locality of \( - 3Q\), it is

1 \(E/3\)
2 \(2E\)
3 \(4E/3\)
4 \(3E\)
PHXII01:ELECTRIC CHARGES AND FIELDS

358187 Two charges each of magnitude \(Q\) are fixed at each of two opposite corners of a square. Two other charges each of magnitude \(q\) are placed at each of the other two corners. If the resultant electric force on \(Q\) is zero, then \(Q\) and \(q\) are related as

1 \(Q = 2\sqrt 2 q\)
2 \(Q = - 2\sqrt 2 q\)
3 \(Q = \sqrt 2 q\)
4 \(Q = - \sqrt 2 q\)
PHXII01:ELECTRIC CHARGES AND FIELDS

358184 In the following four situations charged particles are at equal distance from the origin. Arrange them the magnitude of the net electric field at origin greatest first
supporting img

supporting img

1 (ii) > (i) > (iii) > (iv)
2 (i) > (ii) > (iii) > (iv)
3 (iv) > (iii) > (ii) > (i)
4 (i) > (iii) > (ii) > (iv)
PHXII01:ELECTRIC CHARGES AND FIELDS

358185 Assertion :
Three equal charges are situated on a circle of radius \(r\) such that they form on equilateral triangle, then the electric field intensity at the centre is zero.
Reason :
The force on unit positive charge at the centre, due to the three equal charges are represented by the three sides of a triangle taken in the same order. Therefore, electric field intensity at centre is zero.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXII01:ELECTRIC CHARGES AND FIELDS

358186 Two charges \(Q\) and \( - 3Q\) are placed at some distance apart. If the electric field at the location of \(Q\) is \(E\) then at the locality of \( - 3Q\), it is

1 \(E/3\)
2 \(2E\)
3 \(4E/3\)
4 \(3E\)
PHXII01:ELECTRIC CHARGES AND FIELDS

358187 Two charges each of magnitude \(Q\) are fixed at each of two opposite corners of a square. Two other charges each of magnitude \(q\) are placed at each of the other two corners. If the resultant electric force on \(Q\) is zero, then \(Q\) and \(q\) are related as

1 \(Q = 2\sqrt 2 q\)
2 \(Q = - 2\sqrt 2 q\)
3 \(Q = \sqrt 2 q\)
4 \(Q = - \sqrt 2 q\)
PHXII01:ELECTRIC CHARGES AND FIELDS

358184 In the following four situations charged particles are at equal distance from the origin. Arrange them the magnitude of the net electric field at origin greatest first
supporting img

supporting img

1 (ii) > (i) > (iii) > (iv)
2 (i) > (ii) > (iii) > (iv)
3 (iv) > (iii) > (ii) > (i)
4 (i) > (iii) > (ii) > (iv)
PHXII01:ELECTRIC CHARGES AND FIELDS

358185 Assertion :
Three equal charges are situated on a circle of radius \(r\) such that they form on equilateral triangle, then the electric field intensity at the centre is zero.
Reason :
The force on unit positive charge at the centre, due to the three equal charges are represented by the three sides of a triangle taken in the same order. Therefore, electric field intensity at centre is zero.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXII01:ELECTRIC CHARGES AND FIELDS

358186 Two charges \(Q\) and \( - 3Q\) are placed at some distance apart. If the electric field at the location of \(Q\) is \(E\) then at the locality of \( - 3Q\), it is

1 \(E/3\)
2 \(2E\)
3 \(4E/3\)
4 \(3E\)
PHXII01:ELECTRIC CHARGES AND FIELDS

358187 Two charges each of magnitude \(Q\) are fixed at each of two opposite corners of a square. Two other charges each of magnitude \(q\) are placed at each of the other two corners. If the resultant electric force on \(Q\) is zero, then \(Q\) and \(q\) are related as

1 \(Q = 2\sqrt 2 q\)
2 \(Q = - 2\sqrt 2 q\)
3 \(Q = \sqrt 2 q\)
4 \(Q = - \sqrt 2 q\)