357102
Assertion : There is no current in the metals in the absence of electric field. Reason : Motion of free electron is random.
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 metals, free electrons move randomly in all directions due to thermal motion. However, in the absence of an external electric field, this random motion does not result in a net flow of charge or current. So correct option is (1).
PHXII03:CURRENT ELECTRICITY
357103
A graph drawn between current through a conductor and time \(t\). Total charge flown through the conductor is
357104
The electron of hydrogen atom is considered to be revolving round a proton in circular orbit of radius \(r\) with velocity \(v\) . The current \(i\) is
357105
The electric current through a wire varies with time as \(I=I_{0}+\beta t\), where \({I_0} = 20\;A\) and \(\beta = 3\;A/s.\) The amount of electric charge crossed through a section of the wire in \(20\,s\) is
1 \(1000\,C\)
2 \(800\,C\)
3 \(80\,C\)
4 \(1600\,C\)
Explanation:
Given: \(I=I_{0}+\beta t\) \({I_0} = 20A\,;\,\,\,\beta = 3\;A/s\,;\,\,\,t = 20\;s\) Amount of charge passing through the wire As \(i=\dfrac{d q}{d t}\) \(\therefore q=\int_{0}^{20} I \cdot d t=\int_{0}^{20}(20+3 t) d t\) \(: q=\left[20 t+\dfrac{3 t^{2}}{2}\right]_{0}^{20}=20(20-0)+\dfrac{3}{2}\left(20^{2}-0^{2}\right)\) \(q = 1000\,C\)
357102
Assertion : There is no current in the metals in the absence of electric field. Reason : Motion of free electron is random.
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 metals, free electrons move randomly in all directions due to thermal motion. However, in the absence of an external electric field, this random motion does not result in a net flow of charge or current. So correct option is (1).
PHXII03:CURRENT ELECTRICITY
357103
A graph drawn between current through a conductor and time \(t\). Total charge flown through the conductor is
357104
The electron of hydrogen atom is considered to be revolving round a proton in circular orbit of radius \(r\) with velocity \(v\) . The current \(i\) is
357105
The electric current through a wire varies with time as \(I=I_{0}+\beta t\), where \({I_0} = 20\;A\) and \(\beta = 3\;A/s.\) The amount of electric charge crossed through a section of the wire in \(20\,s\) is
1 \(1000\,C\)
2 \(800\,C\)
3 \(80\,C\)
4 \(1600\,C\)
Explanation:
Given: \(I=I_{0}+\beta t\) \({I_0} = 20A\,;\,\,\,\beta = 3\;A/s\,;\,\,\,t = 20\;s\) Amount of charge passing through the wire As \(i=\dfrac{d q}{d t}\) \(\therefore q=\int_{0}^{20} I \cdot d t=\int_{0}^{20}(20+3 t) d t\) \(: q=\left[20 t+\dfrac{3 t^{2}}{2}\right]_{0}^{20}=20(20-0)+\dfrac{3}{2}\left(20^{2}-0^{2}\right)\) \(q = 1000\,C\)
357102
Assertion : There is no current in the metals in the absence of electric field. Reason : Motion of free electron is random.
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 metals, free electrons move randomly in all directions due to thermal motion. However, in the absence of an external electric field, this random motion does not result in a net flow of charge or current. So correct option is (1).
PHXII03:CURRENT ELECTRICITY
357103
A graph drawn between current through a conductor and time \(t\). Total charge flown through the conductor is
357104
The electron of hydrogen atom is considered to be revolving round a proton in circular orbit of radius \(r\) with velocity \(v\) . The current \(i\) is
357105
The electric current through a wire varies with time as \(I=I_{0}+\beta t\), where \({I_0} = 20\;A\) and \(\beta = 3\;A/s.\) The amount of electric charge crossed through a section of the wire in \(20\,s\) is
1 \(1000\,C\)
2 \(800\,C\)
3 \(80\,C\)
4 \(1600\,C\)
Explanation:
Given: \(I=I_{0}+\beta t\) \({I_0} = 20A\,;\,\,\,\beta = 3\;A/s\,;\,\,\,t = 20\;s\) Amount of charge passing through the wire As \(i=\dfrac{d q}{d t}\) \(\therefore q=\int_{0}^{20} I \cdot d t=\int_{0}^{20}(20+3 t) d t\) \(: q=\left[20 t+\dfrac{3 t^{2}}{2}\right]_{0}^{20}=20(20-0)+\dfrac{3}{2}\left(20^{2}-0^{2}\right)\) \(q = 1000\,C\)
NEET Test Series from KOTA - 10 Papers In MS WORD
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PHXII03:CURRENT ELECTRICITY
357102
Assertion : There is no current in the metals in the absence of electric field. Reason : Motion of free electron is random.
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 metals, free electrons move randomly in all directions due to thermal motion. However, in the absence of an external electric field, this random motion does not result in a net flow of charge or current. So correct option is (1).
PHXII03:CURRENT ELECTRICITY
357103
A graph drawn between current through a conductor and time \(t\). Total charge flown through the conductor is
357104
The electron of hydrogen atom is considered to be revolving round a proton in circular orbit of radius \(r\) with velocity \(v\) . The current \(i\) is
357105
The electric current through a wire varies with time as \(I=I_{0}+\beta t\), where \({I_0} = 20\;A\) and \(\beta = 3\;A/s.\) The amount of electric charge crossed through a section of the wire in \(20\,s\) is
1 \(1000\,C\)
2 \(800\,C\)
3 \(80\,C\)
4 \(1600\,C\)
Explanation:
Given: \(I=I_{0}+\beta t\) \({I_0} = 20A\,;\,\,\,\beta = 3\;A/s\,;\,\,\,t = 20\;s\) Amount of charge passing through the wire As \(i=\dfrac{d q}{d t}\) \(\therefore q=\int_{0}^{20} I \cdot d t=\int_{0}^{20}(20+3 t) d t\) \(: q=\left[20 t+\dfrac{3 t^{2}}{2}\right]_{0}^{20}=20(20-0)+\dfrac{3}{2}\left(20^{2}-0^{2}\right)\) \(q = 1000\,C\)
