NEET Test Series from KOTA - 10 Papers In MS WORD
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PHXII01:ELECTRIC CHARGES AND FIELDS
358131
One million electrons are added to a glass rod. The total charge on the rod is
1 \({10^{ - 13}}\,C\)
2 \( - 1.6 \times {10^{ - 13}}\,C\)
3 \( + 1.6 \times {10^{ - 12}}\,C\)
4 \({10^{ - 12}}\,C\)
Explanation:
\(Q=-n e, n=10^{6}\) \(e=1.6 \times 10^{-13}\)
PHXII01:ELECTRIC CHARGES AND FIELDS
358132
Statement A : When bodies are charged through friction, there is a transfer of electric charge from one body to another, but no creation or destruction of charge. Statement B : For an isolated system charge is always conserved.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
Explanation:
Conservation of electric charges states that the total charge of an isolated system remains unchanged with time. So option (3) is correct.
PHXII01:ELECTRIC CHARGES AND FIELDS
358348
Energy associated with a moving charge is due to a
1 Magnetic field
2 Electric field
3 Both electric field and magnetic field
4 None of these
Explanation:
A moving charge produces magnetic field and a charge always produces electric field. Energy is associated with electric and magnetic field
PHXII01:ELECTRIC CHARGES AND FIELDS
358349
Assertion : The lightning conductor at the top of high building has sharp pointed ends. Reason : The surface density of charge at sharp points is very high resulting in setting up of electric wind.
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 Both Assertion and Reason are incorrect.
Explanation:
The lightning conductor at the top of a high building has sharp pointed ends. This is correct because lightning conductors often have pointed ends to facilitate the discharge of electric charges. Reason explains why the sharp pointed ends are used. It correctly states that the surface density of charge at sharp points is very high, which results in the setting up of an electric wind. This electric wind helps in the discharge of electric charges to nearby charged clouds and reduces the chances of lightning striking the building. If lightning does strike, the charge is conducted to the earth, protecting the building. The Reason provides a valid scientific explanation for the Assertion, so the correct choice is (1).
358131
One million electrons are added to a glass rod. The total charge on the rod is
1 \({10^{ - 13}}\,C\)
2 \( - 1.6 \times {10^{ - 13}}\,C\)
3 \( + 1.6 \times {10^{ - 12}}\,C\)
4 \({10^{ - 12}}\,C\)
Explanation:
\(Q=-n e, n=10^{6}\) \(e=1.6 \times 10^{-13}\)
PHXII01:ELECTRIC CHARGES AND FIELDS
358132
Statement A : When bodies are charged through friction, there is a transfer of electric charge from one body to another, but no creation or destruction of charge. Statement B : For an isolated system charge is always conserved.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
Explanation:
Conservation of electric charges states that the total charge of an isolated system remains unchanged with time. So option (3) is correct.
PHXII01:ELECTRIC CHARGES AND FIELDS
358348
Energy associated with a moving charge is due to a
1 Magnetic field
2 Electric field
3 Both electric field and magnetic field
4 None of these
Explanation:
A moving charge produces magnetic field and a charge always produces electric field. Energy is associated with electric and magnetic field
PHXII01:ELECTRIC CHARGES AND FIELDS
358349
Assertion : The lightning conductor at the top of high building has sharp pointed ends. Reason : The surface density of charge at sharp points is very high resulting in setting up of electric wind.
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 Both Assertion and Reason are incorrect.
Explanation:
The lightning conductor at the top of a high building has sharp pointed ends. This is correct because lightning conductors often have pointed ends to facilitate the discharge of electric charges. Reason explains why the sharp pointed ends are used. It correctly states that the surface density of charge at sharp points is very high, which results in the setting up of an electric wind. This electric wind helps in the discharge of electric charges to nearby charged clouds and reduces the chances of lightning striking the building. If lightning does strike, the charge is conducted to the earth, protecting the building. The Reason provides a valid scientific explanation for the Assertion, so the correct choice is (1).
358131
One million electrons are added to a glass rod. The total charge on the rod is
1 \({10^{ - 13}}\,C\)
2 \( - 1.6 \times {10^{ - 13}}\,C\)
3 \( + 1.6 \times {10^{ - 12}}\,C\)
4 \({10^{ - 12}}\,C\)
Explanation:
\(Q=-n e, n=10^{6}\) \(e=1.6 \times 10^{-13}\)
PHXII01:ELECTRIC CHARGES AND FIELDS
358132
Statement A : When bodies are charged through friction, there is a transfer of electric charge from one body to another, but no creation or destruction of charge. Statement B : For an isolated system charge is always conserved.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
Explanation:
Conservation of electric charges states that the total charge of an isolated system remains unchanged with time. So option (3) is correct.
PHXII01:ELECTRIC CHARGES AND FIELDS
358348
Energy associated with a moving charge is due to a
1 Magnetic field
2 Electric field
3 Both electric field and magnetic field
4 None of these
Explanation:
A moving charge produces magnetic field and a charge always produces electric field. Energy is associated with electric and magnetic field
PHXII01:ELECTRIC CHARGES AND FIELDS
358349
Assertion : The lightning conductor at the top of high building has sharp pointed ends. Reason : The surface density of charge at sharp points is very high resulting in setting up of electric wind.
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 Both Assertion and Reason are incorrect.
Explanation:
The lightning conductor at the top of a high building has sharp pointed ends. This is correct because lightning conductors often have pointed ends to facilitate the discharge of electric charges. Reason explains why the sharp pointed ends are used. It correctly states that the surface density of charge at sharp points is very high, which results in the setting up of an electric wind. This electric wind helps in the discharge of electric charges to nearby charged clouds and reduces the chances of lightning striking the building. If lightning does strike, the charge is conducted to the earth, protecting the building. The Reason provides a valid scientific explanation for the Assertion, so the correct choice is (1).
358131
One million electrons are added to a glass rod. The total charge on the rod is
1 \({10^{ - 13}}\,C\)
2 \( - 1.6 \times {10^{ - 13}}\,C\)
3 \( + 1.6 \times {10^{ - 12}}\,C\)
4 \({10^{ - 12}}\,C\)
Explanation:
\(Q=-n e, n=10^{6}\) \(e=1.6 \times 10^{-13}\)
PHXII01:ELECTRIC CHARGES AND FIELDS
358132
Statement A : When bodies are charged through friction, there is a transfer of electric charge from one body to another, but no creation or destruction of charge. Statement B : For an isolated system charge is always conserved.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
Explanation:
Conservation of electric charges states that the total charge of an isolated system remains unchanged with time. So option (3) is correct.
PHXII01:ELECTRIC CHARGES AND FIELDS
358348
Energy associated with a moving charge is due to a
1 Magnetic field
2 Electric field
3 Both electric field and magnetic field
4 None of these
Explanation:
A moving charge produces magnetic field and a charge always produces electric field. Energy is associated with electric and magnetic field
PHXII01:ELECTRIC CHARGES AND FIELDS
358349
Assertion : The lightning conductor at the top of high building has sharp pointed ends. Reason : The surface density of charge at sharp points is very high resulting in setting up of electric wind.
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 Both Assertion and Reason are incorrect.
Explanation:
The lightning conductor at the top of a high building has sharp pointed ends. This is correct because lightning conductors often have pointed ends to facilitate the discharge of electric charges. Reason explains why the sharp pointed ends are used. It correctly states that the surface density of charge at sharp points is very high, which results in the setting up of an electric wind. This electric wind helps in the discharge of electric charges to nearby charged clouds and reduces the chances of lightning striking the building. If lightning does strike, the charge is conducted to the earth, protecting the building. The Reason provides a valid scientific explanation for the Assertion, so the correct choice is (1).
