Charge on the body is \(q = ne\) \(\therefore \) No of electrons present on the body is \(n = \frac{q}{e} = \frac{{1 \times {{10}^{ - 9}}C}}{{1.6 \times {{10}^{ - 19}}C}} = 6.25 \times {10^9}\)
PHXII01:ELECTRIC CHARGES AND FIELDS
357982
\({10^{5}}\) electrons are removed per second from a large metallic sphere. How long will it take to gain \({+4 C}\) on the sphere?
1 \({10^{2} y r}\)
2 \({10^{11} {yr}}\)
3 \({10^{6} y r}\)
4 \({10^{3} y r}\)
Explanation:
Total electrons to be removed are \({Q=n e \Rightarrow n=\dfrac{4}{1 \cdot 6 \times 10^{-19}}=2.5 \times 10^{19}}\) time \({=\dfrac{n}{(\text { rate } / {sec})}=\dfrac{2 \cdot 5 \times 10^{19}}{10^{5}}=2 \cdot 5 \times 10^{14}}\) \({=\dfrac{2 \cdot 5 \times 10^{14}}{365 \times 24 \times 60 \times 60}=7 \cdot 9 \times 10^{6}}\) years
PHXII01:ELECTRIC CHARGES AND FIELDS
357983
Assertion : When charges are shared between any two bodies, no charge is really lost, but some loss of energy does occur. Reason : Some energy disappears in the form of heat, sparking etc.
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.
Explanation:
In, Assertion, charge is conserved but there is a loss of energy when charges are shared between bodies due to exertion of coulomb force. Both Assertion and Reason are true and Reason is the correct explanation of Assertion. So correct option is (1).
PHXII01:ELECTRIC CHARGES AND FIELDS
357984
When \(10^{19}\) electrons are removed from a neutral metal plate, the electric charge on it is
Charge on the body is \(q = ne\) \(\therefore \) No of electrons present on the body is \(n = \frac{q}{e} = \frac{{1 \times {{10}^{ - 9}}C}}{{1.6 \times {{10}^{ - 19}}C}} = 6.25 \times {10^9}\)
PHXII01:ELECTRIC CHARGES AND FIELDS
357982
\({10^{5}}\) electrons are removed per second from a large metallic sphere. How long will it take to gain \({+4 C}\) on the sphere?
1 \({10^{2} y r}\)
2 \({10^{11} {yr}}\)
3 \({10^{6} y r}\)
4 \({10^{3} y r}\)
Explanation:
Total electrons to be removed are \({Q=n e \Rightarrow n=\dfrac{4}{1 \cdot 6 \times 10^{-19}}=2.5 \times 10^{19}}\) time \({=\dfrac{n}{(\text { rate } / {sec})}=\dfrac{2 \cdot 5 \times 10^{19}}{10^{5}}=2 \cdot 5 \times 10^{14}}\) \({=\dfrac{2 \cdot 5 \times 10^{14}}{365 \times 24 \times 60 \times 60}=7 \cdot 9 \times 10^{6}}\) years
PHXII01:ELECTRIC CHARGES AND FIELDS
357983
Assertion : When charges are shared between any two bodies, no charge is really lost, but some loss of energy does occur. Reason : Some energy disappears in the form of heat, sparking etc.
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.
Explanation:
In, Assertion, charge is conserved but there is a loss of energy when charges are shared between bodies due to exertion of coulomb force. Both Assertion and Reason are true and Reason is the correct explanation of Assertion. So correct option is (1).
PHXII01:ELECTRIC CHARGES AND FIELDS
357984
When \(10^{19}\) electrons are removed from a neutral metal plate, the electric charge on it is
Charge on the body is \(q = ne\) \(\therefore \) No of electrons present on the body is \(n = \frac{q}{e} = \frac{{1 \times {{10}^{ - 9}}C}}{{1.6 \times {{10}^{ - 19}}C}} = 6.25 \times {10^9}\)
PHXII01:ELECTRIC CHARGES AND FIELDS
357982
\({10^{5}}\) electrons are removed per second from a large metallic sphere. How long will it take to gain \({+4 C}\) on the sphere?
1 \({10^{2} y r}\)
2 \({10^{11} {yr}}\)
3 \({10^{6} y r}\)
4 \({10^{3} y r}\)
Explanation:
Total electrons to be removed are \({Q=n e \Rightarrow n=\dfrac{4}{1 \cdot 6 \times 10^{-19}}=2.5 \times 10^{19}}\) time \({=\dfrac{n}{(\text { rate } / {sec})}=\dfrac{2 \cdot 5 \times 10^{19}}{10^{5}}=2 \cdot 5 \times 10^{14}}\) \({=\dfrac{2 \cdot 5 \times 10^{14}}{365 \times 24 \times 60 \times 60}=7 \cdot 9 \times 10^{6}}\) years
PHXII01:ELECTRIC CHARGES AND FIELDS
357983
Assertion : When charges are shared between any two bodies, no charge is really lost, but some loss of energy does occur. Reason : Some energy disappears in the form of heat, sparking etc.
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.
Explanation:
In, Assertion, charge is conserved but there is a loss of energy when charges are shared between bodies due to exertion of coulomb force. Both Assertion and Reason are true and Reason is the correct explanation of Assertion. So correct option is (1).
PHXII01:ELECTRIC CHARGES AND FIELDS
357984
When \(10^{19}\) electrons are removed from a neutral metal plate, the electric charge on it is
Charge on the body is \(q = ne\) \(\therefore \) No of electrons present on the body is \(n = \frac{q}{e} = \frac{{1 \times {{10}^{ - 9}}C}}{{1.6 \times {{10}^{ - 19}}C}} = 6.25 \times {10^9}\)
PHXII01:ELECTRIC CHARGES AND FIELDS
357982
\({10^{5}}\) electrons are removed per second from a large metallic sphere. How long will it take to gain \({+4 C}\) on the sphere?
1 \({10^{2} y r}\)
2 \({10^{11} {yr}}\)
3 \({10^{6} y r}\)
4 \({10^{3} y r}\)
Explanation:
Total electrons to be removed are \({Q=n e \Rightarrow n=\dfrac{4}{1 \cdot 6 \times 10^{-19}}=2.5 \times 10^{19}}\) time \({=\dfrac{n}{(\text { rate } / {sec})}=\dfrac{2 \cdot 5 \times 10^{19}}{10^{5}}=2 \cdot 5 \times 10^{14}}\) \({=\dfrac{2 \cdot 5 \times 10^{14}}{365 \times 24 \times 60 \times 60}=7 \cdot 9 \times 10^{6}}\) years
PHXII01:ELECTRIC CHARGES AND FIELDS
357983
Assertion : When charges are shared between any two bodies, no charge is really lost, but some loss of energy does occur. Reason : Some energy disappears in the form of heat, sparking etc.
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.
Explanation:
In, Assertion, charge is conserved but there is a loss of energy when charges are shared between bodies due to exertion of coulomb force. Both Assertion and Reason are true and Reason is the correct explanation of Assertion. So correct option is (1).
PHXII01:ELECTRIC CHARGES AND FIELDS
357984
When \(10^{19}\) electrons are removed from a neutral metal plate, the electric charge on it is