Coulomb's Law
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NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
PHXII01:ELECTRIC CHARGES AND FIELDS

358091 Two point charges placed at a distance \(r\) in air experience a certain force. Then the distance at which they will experience the same force in a medium of dielectric constant \(K\) is

1 \(Kr\)
2 \(r/K\)
3 \(r + \sqrt K \)
4 \(\frac{r}{{\sqrt K }}\)
PHXII01:ELECTRIC CHARGES AND FIELDS

358092 Two positive ions, each carrying a charge \(q\), are separated by a distance \(d\). If F is the force of repulsion between the ions, the number of electrons missing from each ions will be (e being the charge on an electron)

1 \(\frac{{4\pi {\varepsilon _0}F{d^2}}}{{{d^2}}}\)
2 \(\sqrt {\frac{{4\pi {\varepsilon _0}F{d^2}}}{e}} \)
3 \(\sqrt {\frac{{4\pi {\varepsilon _0}F{d^2}}}{{{e^2}}}} \)
4 \(\frac{{4\pi {\varepsilon _0}F{d^2}}}{{{q^2}}}\)
PHXII01:ELECTRIC CHARGES AND FIELDS

358093 Two identical conducting balls \(A\) and \(B\) have positive charges \(q_{1}\) and \(q_{2}\) respectively but \(q_{1} \neq q_{2}\). The balls are brought together so that they touch each other and then kept in their original positions. The force between them is

1 less than that before the balls touched
2 greater than that before the balls touched
3 same as that before the balls touched
4 zero
PHXII01:ELECTRIC CHARGES AND FIELDS

358094 Two copper balls, each weighing 10 \(g\) are kept in air 10 \(cm\) apart. If one electron from every \({10^6}\) atoms is transferred from one ball to the other, the coulomb force between them is (atomic weight of copper is \(63.5g\))

1 \(2.0 \times {10^6}N\)
2 \(2.0 \times {10^4}N\)
3 \(2.0 \times {10^{10}}N\)
4 \(2.0 \times {10^8}N\)
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PHXII01:ELECTRIC CHARGES AND FIELDS

358091 Two point charges placed at a distance \(r\) in air experience a certain force. Then the distance at which they will experience the same force in a medium of dielectric constant \(K\) is

1 \(Kr\)
2 \(r/K\)
3 \(r + \sqrt K \)
4 \(\frac{r}{{\sqrt K }}\)
PHXII01:ELECTRIC CHARGES AND FIELDS

358092 Two positive ions, each carrying a charge \(q\), are separated by a distance \(d\). If F is the force of repulsion between the ions, the number of electrons missing from each ions will be (e being the charge on an electron)

1 \(\frac{{4\pi {\varepsilon _0}F{d^2}}}{{{d^2}}}\)
2 \(\sqrt {\frac{{4\pi {\varepsilon _0}F{d^2}}}{e}} \)
3 \(\sqrt {\frac{{4\pi {\varepsilon _0}F{d^2}}}{{{e^2}}}} \)
4 \(\frac{{4\pi {\varepsilon _0}F{d^2}}}{{{q^2}}}\)
PHXII01:ELECTRIC CHARGES AND FIELDS

358093 Two identical conducting balls \(A\) and \(B\) have positive charges \(q_{1}\) and \(q_{2}\) respectively but \(q_{1} \neq q_{2}\). The balls are brought together so that they touch each other and then kept in their original positions. The force between them is

1 less than that before the balls touched
2 greater than that before the balls touched
3 same as that before the balls touched
4 zero
PHXII01:ELECTRIC CHARGES AND FIELDS

358094 Two copper balls, each weighing 10 \(g\) are kept in air 10 \(cm\) apart. If one electron from every \({10^6}\) atoms is transferred from one ball to the other, the coulomb force between them is (atomic weight of copper is \(63.5g\))

1 \(2.0 \times {10^6}N\)
2 \(2.0 \times {10^4}N\)
3 \(2.0 \times {10^{10}}N\)
4 \(2.0 \times {10^8}N\)
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PHXII01:ELECTRIC CHARGES AND FIELDS

358091 Two point charges placed at a distance \(r\) in air experience a certain force. Then the distance at which they will experience the same force in a medium of dielectric constant \(K\) is

1 \(Kr\)
2 \(r/K\)
3 \(r + \sqrt K \)
4 \(\frac{r}{{\sqrt K }}\)
PHXII01:ELECTRIC CHARGES AND FIELDS

358092 Two positive ions, each carrying a charge \(q\), are separated by a distance \(d\). If F is the force of repulsion between the ions, the number of electrons missing from each ions will be (e being the charge on an electron)

1 \(\frac{{4\pi {\varepsilon _0}F{d^2}}}{{{d^2}}}\)
2 \(\sqrt {\frac{{4\pi {\varepsilon _0}F{d^2}}}{e}} \)
3 \(\sqrt {\frac{{4\pi {\varepsilon _0}F{d^2}}}{{{e^2}}}} \)
4 \(\frac{{4\pi {\varepsilon _0}F{d^2}}}{{{q^2}}}\)
PHXII01:ELECTRIC CHARGES AND FIELDS

358093 Two identical conducting balls \(A\) and \(B\) have positive charges \(q_{1}\) and \(q_{2}\) respectively but \(q_{1} \neq q_{2}\). The balls are brought together so that they touch each other and then kept in their original positions. The force between them is

1 less than that before the balls touched
2 greater than that before the balls touched
3 same as that before the balls touched
4 zero
PHXII01:ELECTRIC CHARGES AND FIELDS

358094 Two copper balls, each weighing 10 \(g\) are kept in air 10 \(cm\) apart. If one electron from every \({10^6}\) atoms is transferred from one ball to the other, the coulomb force between them is (atomic weight of copper is \(63.5g\))

1 \(2.0 \times {10^6}N\)
2 \(2.0 \times {10^4}N\)
3 \(2.0 \times {10^{10}}N\)
4 \(2.0 \times {10^8}N\)
For More Updates join with Us
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
PHXII01:ELECTRIC CHARGES AND FIELDS

358091 Two point charges placed at a distance \(r\) in air experience a certain force. Then the distance at which they will experience the same force in a medium of dielectric constant \(K\) is

1 \(Kr\)
2 \(r/K\)
3 \(r + \sqrt K \)
4 \(\frac{r}{{\sqrt K }}\)
PHXII01:ELECTRIC CHARGES AND FIELDS

358092 Two positive ions, each carrying a charge \(q\), are separated by a distance \(d\). If F is the force of repulsion between the ions, the number of electrons missing from each ions will be (e being the charge on an electron)

1 \(\frac{{4\pi {\varepsilon _0}F{d^2}}}{{{d^2}}}\)
2 \(\sqrt {\frac{{4\pi {\varepsilon _0}F{d^2}}}{e}} \)
3 \(\sqrt {\frac{{4\pi {\varepsilon _0}F{d^2}}}{{{e^2}}}} \)
4 \(\frac{{4\pi {\varepsilon _0}F{d^2}}}{{{q^2}}}\)
PHXII01:ELECTRIC CHARGES AND FIELDS

358093 Two identical conducting balls \(A\) and \(B\) have positive charges \(q_{1}\) and \(q_{2}\) respectively but \(q_{1} \neq q_{2}\). The balls are brought together so that they touch each other and then kept in their original positions. The force between them is

1 less than that before the balls touched
2 greater than that before the balls touched
3 same as that before the balls touched
4 zero
PHXII01:ELECTRIC CHARGES AND FIELDS

358094 Two copper balls, each weighing 10 \(g\) are kept in air 10 \(cm\) apart. If one electron from every \({10^6}\) atoms is transferred from one ball to the other, the coulomb force between them is (atomic weight of copper is \(63.5g\))

1 \(2.0 \times {10^6}N\)
2 \(2.0 \times {10^4}N\)
3 \(2.0 \times {10^{10}}N\)
4 \(2.0 \times {10^8}N\)
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