00. Biot-Savart's Law and Magnetic Field, Lorentz Force
Moving Charges & Magnetism

153109 The source of time varying magnetic field may be

1 (D) only
2 (C) and (D) only
3 (A) only
4 (B) and (D) only
5 an antenna fed with a digital signal Choose the correct answer from the options given below :
Moving Charges & Magnetism

153130 A long straight wire with a circular crosssection having radius $R$, is carrying a steady current $I$. The current $I$ is uniformly distributed across this cross-section. Then the variation of magnetic field due to current I with distance $r(r\ltR)$ from its centre will be :

1 $\mathrm{B} \propto \mathrm{r}^{2}$
2 $\mathrm{B} \propto \mathrm{r}$
3 $\mathrm{B} \propto \frac{1}{\mathrm{r}^{2}}$
4 $\mathrm{B} \propto \frac{1}{\mathrm{r}}$
Moving Charges & Magnetism

153134 Given below are two statements
Statement I: Biot-Savart's law gives us the expression for the magnetic field strength of an infinitesimal current element $(\operatorname{Id} l)$ of a current carrying conductor only.
Statement II: Biot-Savert's law is analogous to Coulomb's inverse square law of charge q, with the former being related to the field produce by a scalar source, $\mathrm{Id} l$ while the latter being produced by a vector sources $q$ in light of above statements. Choose the most appropriate answer from the option given below

1 Statement I is correct and Statement II is incorrect
2 Statement I is incorrect and Statement II is correct
3 Both Statement I and Statement II are correct
4 Both Statement I and Statement II are incorrect
Moving Charges & Magnetism

153147 In a co-axial straight cable the central conductor and the outer conductor carry equal currents in opposite directions. The magnetic field is zero

1 outside the cable
2 inside the inner conductor
3 inside the outer conductor
4 in between the two conductors
Moving Charges & Magnetism

153154 3 A of current is flowing in a linear conductor having a length of $40 \mathrm{~cm}$. The conductor is placed in a magnetic field of strength 500 Gauss and makes an angle of $30^{\circ}$ with the direction of the field. It experiences a force of magnitude

1 $3 \times 10^{4} \mathrm{~N}$
2 $3 \times 10^{2} \mathrm{~N}$
3 $3 \times 10^{-2} \mathrm{~N}$
4 $3 \times 10^{-4} \mathrm{~N}$
Moving Charges & Magnetism

153109 The source of time varying magnetic field may be

1 (D) only
2 (C) and (D) only
3 (A) only
4 (B) and (D) only
5 an antenna fed with a digital signal Choose the correct answer from the options given below :
Moving Charges & Magnetism

153130 A long straight wire with a circular crosssection having radius $R$, is carrying a steady current $I$. The current $I$ is uniformly distributed across this cross-section. Then the variation of magnetic field due to current I with distance $r(r\ltR)$ from its centre will be :

1 $\mathrm{B} \propto \mathrm{r}^{2}$
2 $\mathrm{B} \propto \mathrm{r}$
3 $\mathrm{B} \propto \frac{1}{\mathrm{r}^{2}}$
4 $\mathrm{B} \propto \frac{1}{\mathrm{r}}$
Moving Charges & Magnetism

153134 Given below are two statements
Statement I: Biot-Savart's law gives us the expression for the magnetic field strength of an infinitesimal current element $(\operatorname{Id} l)$ of a current carrying conductor only.
Statement II: Biot-Savert's law is analogous to Coulomb's inverse square law of charge q, with the former being related to the field produce by a scalar source, $\mathrm{Id} l$ while the latter being produced by a vector sources $q$ in light of above statements. Choose the most appropriate answer from the option given below

1 Statement I is correct and Statement II is incorrect
2 Statement I is incorrect and Statement II is correct
3 Both Statement I and Statement II are correct
4 Both Statement I and Statement II are incorrect
Moving Charges & Magnetism

153147 In a co-axial straight cable the central conductor and the outer conductor carry equal currents in opposite directions. The magnetic field is zero

1 outside the cable
2 inside the inner conductor
3 inside the outer conductor
4 in between the two conductors
Moving Charges & Magnetism

153154 3 A of current is flowing in a linear conductor having a length of $40 \mathrm{~cm}$. The conductor is placed in a magnetic field of strength 500 Gauss and makes an angle of $30^{\circ}$ with the direction of the field. It experiences a force of magnitude

1 $3 \times 10^{4} \mathrm{~N}$
2 $3 \times 10^{2} \mathrm{~N}$
3 $3 \times 10^{-2} \mathrm{~N}$
4 $3 \times 10^{-4} \mathrm{~N}$
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
Moving Charges & Magnetism

153109 The source of time varying magnetic field may be

1 (D) only
2 (C) and (D) only
3 (A) only
4 (B) and (D) only
5 an antenna fed with a digital signal Choose the correct answer from the options given below :
Moving Charges & Magnetism

153130 A long straight wire with a circular crosssection having radius $R$, is carrying a steady current $I$. The current $I$ is uniformly distributed across this cross-section. Then the variation of magnetic field due to current I with distance $r(r\ltR)$ from its centre will be :

1 $\mathrm{B} \propto \mathrm{r}^{2}$
2 $\mathrm{B} \propto \mathrm{r}$
3 $\mathrm{B} \propto \frac{1}{\mathrm{r}^{2}}$
4 $\mathrm{B} \propto \frac{1}{\mathrm{r}}$
Moving Charges & Magnetism

153134 Given below are two statements
Statement I: Biot-Savart's law gives us the expression for the magnetic field strength of an infinitesimal current element $(\operatorname{Id} l)$ of a current carrying conductor only.
Statement II: Biot-Savert's law is analogous to Coulomb's inverse square law of charge q, with the former being related to the field produce by a scalar source, $\mathrm{Id} l$ while the latter being produced by a vector sources $q$ in light of above statements. Choose the most appropriate answer from the option given below

1 Statement I is correct and Statement II is incorrect
2 Statement I is incorrect and Statement II is correct
3 Both Statement I and Statement II are correct
4 Both Statement I and Statement II are incorrect
Moving Charges & Magnetism

153147 In a co-axial straight cable the central conductor and the outer conductor carry equal currents in opposite directions. The magnetic field is zero

1 outside the cable
2 inside the inner conductor
3 inside the outer conductor
4 in between the two conductors
Moving Charges & Magnetism

153154 3 A of current is flowing in a linear conductor having a length of $40 \mathrm{~cm}$. The conductor is placed in a magnetic field of strength 500 Gauss and makes an angle of $30^{\circ}$ with the direction of the field. It experiences a force of magnitude

1 $3 \times 10^{4} \mathrm{~N}$
2 $3 \times 10^{2} \mathrm{~N}$
3 $3 \times 10^{-2} \mathrm{~N}$
4 $3 \times 10^{-4} \mathrm{~N}$
Moving Charges & Magnetism

153109 The source of time varying magnetic field may be

1 (D) only
2 (C) and (D) only
3 (A) only
4 (B) and (D) only
5 an antenna fed with a digital signal Choose the correct answer from the options given below :
Moving Charges & Magnetism

153130 A long straight wire with a circular crosssection having radius $R$, is carrying a steady current $I$. The current $I$ is uniformly distributed across this cross-section. Then the variation of magnetic field due to current I with distance $r(r\ltR)$ from its centre will be :

1 $\mathrm{B} \propto \mathrm{r}^{2}$
2 $\mathrm{B} \propto \mathrm{r}$
3 $\mathrm{B} \propto \frac{1}{\mathrm{r}^{2}}$
4 $\mathrm{B} \propto \frac{1}{\mathrm{r}}$
Moving Charges & Magnetism

153134 Given below are two statements
Statement I: Biot-Savart's law gives us the expression for the magnetic field strength of an infinitesimal current element $(\operatorname{Id} l)$ of a current carrying conductor only.
Statement II: Biot-Savert's law is analogous to Coulomb's inverse square law of charge q, with the former being related to the field produce by a scalar source, $\mathrm{Id} l$ while the latter being produced by a vector sources $q$ in light of above statements. Choose the most appropriate answer from the option given below

1 Statement I is correct and Statement II is incorrect
2 Statement I is incorrect and Statement II is correct
3 Both Statement I and Statement II are correct
4 Both Statement I and Statement II are incorrect
Moving Charges & Magnetism

153147 In a co-axial straight cable the central conductor and the outer conductor carry equal currents in opposite directions. The magnetic field is zero

1 outside the cable
2 inside the inner conductor
3 inside the outer conductor
4 in between the two conductors
Moving Charges & Magnetism

153154 3 A of current is flowing in a linear conductor having a length of $40 \mathrm{~cm}$. The conductor is placed in a magnetic field of strength 500 Gauss and makes an angle of $30^{\circ}$ with the direction of the field. It experiences a force of magnitude

1 $3 \times 10^{4} \mathrm{~N}$
2 $3 \times 10^{2} \mathrm{~N}$
3 $3 \times 10^{-2} \mathrm{~N}$
4 $3 \times 10^{-4} \mathrm{~N}$
Moving Charges & Magnetism

153109 The source of time varying magnetic field may be

1 (D) only
2 (C) and (D) only
3 (A) only
4 (B) and (D) only
5 an antenna fed with a digital signal Choose the correct answer from the options given below :
Moving Charges & Magnetism

153130 A long straight wire with a circular crosssection having radius $R$, is carrying a steady current $I$. The current $I$ is uniformly distributed across this cross-section. Then the variation of magnetic field due to current I with distance $r(r\ltR)$ from its centre will be :

1 $\mathrm{B} \propto \mathrm{r}^{2}$
2 $\mathrm{B} \propto \mathrm{r}$
3 $\mathrm{B} \propto \frac{1}{\mathrm{r}^{2}}$
4 $\mathrm{B} \propto \frac{1}{\mathrm{r}}$
Moving Charges & Magnetism

153134 Given below are two statements
Statement I: Biot-Savart's law gives us the expression for the magnetic field strength of an infinitesimal current element $(\operatorname{Id} l)$ of a current carrying conductor only.
Statement II: Biot-Savert's law is analogous to Coulomb's inverse square law of charge q, with the former being related to the field produce by a scalar source, $\mathrm{Id} l$ while the latter being produced by a vector sources $q$ in light of above statements. Choose the most appropriate answer from the option given below

1 Statement I is correct and Statement II is incorrect
2 Statement I is incorrect and Statement II is correct
3 Both Statement I and Statement II are correct
4 Both Statement I and Statement II are incorrect
Moving Charges & Magnetism

153147 In a co-axial straight cable the central conductor and the outer conductor carry equal currents in opposite directions. The magnetic field is zero

1 outside the cable
2 inside the inner conductor
3 inside the outer conductor
4 in between the two conductors
Moving Charges & Magnetism

153154 3 A of current is flowing in a linear conductor having a length of $40 \mathrm{~cm}$. The conductor is placed in a magnetic field of strength 500 Gauss and makes an angle of $30^{\circ}$ with the direction of the field. It experiences a force of magnitude

1 $3 \times 10^{4} \mathrm{~N}$
2 $3 \times 10^{2} \mathrm{~N}$
3 $3 \times 10^{-2} \mathrm{~N}$
4 $3 \times 10^{-4} \mathrm{~N}$