One metallic sphere A is given a positive charge whereas another identical metallic sphere B of the exact same mass as of A is given an equal amount of negative charge. Then:
(1) mass of A and mass of B are the same.
(2) mass of A is more.
(3) mass of B is less.
(4) mass of B is more.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe force between two charges 0.06 m apart is 5 N. If each charge is moved towards the other by 0.01 m, then the force between them will become:
1. 7.20 N
2. 11.25 N
3. 22.50 N
4. 45.00 N
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhen 1019 electrons are removed from a neutral metal plate, the electric charge on it is?
1. –1.6 C
2. +1.6 C
3. 10+19 C
4. 10–19 C
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyTwo charges each equal to 2μC are 0.5m apart. If both of them exist inside the vacuum, then the force between them is
(1) 1.89 N
(2) 2.44 N
(3) 0.144 N
(4) 3.144 N
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA solid conducting sphere of radius a has a net positive charge 2Q. A conducting spherical shell of inner radius b and outer radius c is concentric with the solid sphere and has a net charge –Q. The surface charge density on the inner and outer surfaces of the spherical shell will be?
(1)
(2)
(3)
(4) None of the above
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThree charges are placed at the vertices of an equilateral triangle of side ‘a’ as shown in the following figure. The force experienced by the charge placed at the vertex A in a direction normal to BC is
(1)
(2)
(3) Zero
(4)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyTwo particles of equal mass m and charge q are placed at a distance of 16 cm. They do not experience any force. The value of is
(1) l
(2)
(3)
(4)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAn electron is moving around the nucleus of a hydrogen atom in a circular orbit of radius r. The Coulomb force on electron is (Where )
(1)
(2)
(3)
(4)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyFive balls numbered 1 to 5 are suspended using separate threads. Pairs (1, 2), (2, 4), and (4, 1) show electrostatic attraction, while pairs (2, 3) and (4, 5) show repulsion. Therefore ball 1 must be:
1. positively charged.
2. negatively charged.
3. neutral.
4. made of metal.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyEqual charges q are placed at the four corners A, B, C, D of a square of length a. The magnitude of the force on the charge at B will be
(1)
(2)
(3)
(4)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology