02. COULOMB'S LAW
Electric Charges and Fields

267914 Two equally charged identical metal spheres\(A\) and \(B\) repel each other with a force \(F\). Another identical uncharged sphere \(\mathbf{C}\) is touched to \(A\) and then placed midway between \(A\) and \(B\). The net force on \(C\) is in the direction

1 \(F\) towards \(A\)
2 F towards B
3 \(2 F\) towards A
4 \(2 F\) towards B
Electric Charges and Fields

267915 Two unlike chargesseperated by a distance of \(1 \mathrm{~m}\) attract each other with a force of \(0.108 \mathrm{~N}\). If the charges are in the ratio \(1: 3\),the weak charge is

1 \(2 \mu C\)
2 \(4 \mu C\)
3 \(6 \mu C\)
4 \(5 \mu C\)
Electric Charges and Fields

267916 Three charges each equal to\(10^{-9} \mathrm{C}\) are placed at the corners of an equilateral triangle of side \(1 \mathrm{~m}\). The force on one of the charges is

1 \(9 \times 10^{-9} \mathrm{~N}\)
2 \(9 \sqrt{3} \times 10^{-9} \mathrm{~N}\)
3 \(27 \times 10^{-9} \mathrm{~N}\)
4 \(18 \times 10^{-9} \mathrm{~N}\)
Electric Charges and Fields

267917 Two particles each of mass ' \(m\) ' and carrying charge ' \(Q\) ' areseperated by some distance.If they are in equilibrium under mutual gravitational and electro static forces, then \(Q / m\) (in \(\mathbf{c} / \mathbf{K} \mathbf{g}\) ) is of the order of

1 \(10^{-5}\)
2 \(10^{-10}\)
3 \(10^{-15}\)
4 \(10^{-20}\)
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Electric Charges and Fields

267914 Two equally charged identical metal spheres\(A\) and \(B\) repel each other with a force \(F\). Another identical uncharged sphere \(\mathbf{C}\) is touched to \(A\) and then placed midway between \(A\) and \(B\). The net force on \(C\) is in the direction

1 \(F\) towards \(A\)
2 F towards B
3 \(2 F\) towards A
4 \(2 F\) towards B
Electric Charges and Fields

267915 Two unlike chargesseperated by a distance of \(1 \mathrm{~m}\) attract each other with a force of \(0.108 \mathrm{~N}\). If the charges are in the ratio \(1: 3\),the weak charge is

1 \(2 \mu C\)
2 \(4 \mu C\)
3 \(6 \mu C\)
4 \(5 \mu C\)
Electric Charges and Fields

267916 Three charges each equal to\(10^{-9} \mathrm{C}\) are placed at the corners of an equilateral triangle of side \(1 \mathrm{~m}\). The force on one of the charges is

1 \(9 \times 10^{-9} \mathrm{~N}\)
2 \(9 \sqrt{3} \times 10^{-9} \mathrm{~N}\)
3 \(27 \times 10^{-9} \mathrm{~N}\)
4 \(18 \times 10^{-9} \mathrm{~N}\)
Electric Charges and Fields

267917 Two particles each of mass ' \(m\) ' and carrying charge ' \(Q\) ' areseperated by some distance.If they are in equilibrium under mutual gravitational and electro static forces, then \(Q / m\) (in \(\mathbf{c} / \mathbf{K} \mathbf{g}\) ) is of the order of

1 \(10^{-5}\)
2 \(10^{-10}\)
3 \(10^{-15}\)
4 \(10^{-20}\)
Electric Charges and Fields

267914 Two equally charged identical metal spheres\(A\) and \(B\) repel each other with a force \(F\). Another identical uncharged sphere \(\mathbf{C}\) is touched to \(A\) and then placed midway between \(A\) and \(B\). The net force on \(C\) is in the direction

1 \(F\) towards \(A\)
2 F towards B
3 \(2 F\) towards A
4 \(2 F\) towards B
Electric Charges and Fields

267915 Two unlike chargesseperated by a distance of \(1 \mathrm{~m}\) attract each other with a force of \(0.108 \mathrm{~N}\). If the charges are in the ratio \(1: 3\),the weak charge is

1 \(2 \mu C\)
2 \(4 \mu C\)
3 \(6 \mu C\)
4 \(5 \mu C\)
Electric Charges and Fields

267916 Three charges each equal to\(10^{-9} \mathrm{C}\) are placed at the corners of an equilateral triangle of side \(1 \mathrm{~m}\). The force on one of the charges is

1 \(9 \times 10^{-9} \mathrm{~N}\)
2 \(9 \sqrt{3} \times 10^{-9} \mathrm{~N}\)
3 \(27 \times 10^{-9} \mathrm{~N}\)
4 \(18 \times 10^{-9} \mathrm{~N}\)
Electric Charges and Fields

267917 Two particles each of mass ' \(m\) ' and carrying charge ' \(Q\) ' areseperated by some distance.If they are in equilibrium under mutual gravitational and electro static forces, then \(Q / m\) (in \(\mathbf{c} / \mathbf{K} \mathbf{g}\) ) is of the order of

1 \(10^{-5}\)
2 \(10^{-10}\)
3 \(10^{-15}\)
4 \(10^{-20}\)
Electric Charges and Fields

267914 Two equally charged identical metal spheres\(A\) and \(B\) repel each other with a force \(F\). Another identical uncharged sphere \(\mathbf{C}\) is touched to \(A\) and then placed midway between \(A\) and \(B\). The net force on \(C\) is in the direction

1 \(F\) towards \(A\)
2 F towards B
3 \(2 F\) towards A
4 \(2 F\) towards B
Electric Charges and Fields

267915 Two unlike chargesseperated by a distance of \(1 \mathrm{~m}\) attract each other with a force of \(0.108 \mathrm{~N}\). If the charges are in the ratio \(1: 3\),the weak charge is

1 \(2 \mu C\)
2 \(4 \mu C\)
3 \(6 \mu C\)
4 \(5 \mu C\)
Electric Charges and Fields

267916 Three charges each equal to\(10^{-9} \mathrm{C}\) are placed at the corners of an equilateral triangle of side \(1 \mathrm{~m}\). The force on one of the charges is

1 \(9 \times 10^{-9} \mathrm{~N}\)
2 \(9 \sqrt{3} \times 10^{-9} \mathrm{~N}\)
3 \(27 \times 10^{-9} \mathrm{~N}\)
4 \(18 \times 10^{-9} \mathrm{~N}\)
Electric Charges and Fields

267917 Two particles each of mass ' \(m\) ' and carrying charge ' \(Q\) ' areseperated by some distance.If they are in equilibrium under mutual gravitational and electro static forces, then \(Q / m\) (in \(\mathbf{c} / \mathbf{K} \mathbf{g}\) ) is of the order of

1 \(10^{-5}\)
2 \(10^{-10}\)
3 \(10^{-15}\)
4 \(10^{-20}\)