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

153139 A long straight wire carries a current of $20 \mathrm{~A}$. The maximum force experienced by an electron moving at a speed of $100 \mathrm{~km} / \mathrm{s}$, at a distance of $6.4 \mathrm{~cm}$ from the wire is

1 $10^{-18} \mathrm{~N}$
2 $10^{-19} \mathrm{~N}$
3 $5 \times 10^{-17} \mathrm{~N}$
4 $8 \times 10^{-18} \mathrm{~N}$
TS EAMCET 31.07.2022
Moving Charges & Magnetism

153140 Two infinitely long thin wires are placed at (1 $\mathrm{cm}, 0 \mathrm{~cm})$ and $(2 \mathrm{~cm}, 0 \mathrm{~cm})$ as shown in the figure,

The same current $i$ flows in both the wires in the same direction, say, into the page. Let the magnetic field at the origin due to these wires is $\vec{B}$. If $B_{0}$ is the magnitude of the magnetic field if only the wire at $(1 \mathrm{~cm}, 0 \mathrm{~cm})$ was present, then the value of $B / B_{0}$ is

1 $3 / 2$
2 $2 / 3$
3 $1 / 2$
4 2
TS EAMCET 20.07.2022
Moving Charges & Magnetism

153135 Assertion (A) : The magnetic field lines are continuous and form closed loops.
Reason (R) : Magnetic monopole does not exist. The correct option among the following is

1 (A) is true and (R) is the correct explanation for $(\mathrm{A})$
2 (A) is true. ( $\mathrm{R}$ ) is not the correct explanation of (A)
3 (A) is true but (R) is false
4 (A) is false but (R) is true
TS EAMCET 18.07.2022
Moving Charges & Magnetism

153141 A current is flowing in a circular coil of radius $r$ and the magnetic field at the centre is $B_{0}$. At what distance from the centre on the axis of the coil is the magnetic field $\mathrm{B}_{\mathbf{0}} / 27$ ?

1 $\sqrt{3}$
2 $2 \sqrt{2} \mathrm{r}$
3 $\sqrt{2} \mathrm{r}$
4 $2 \mathrm{r}$
Karnataka CET 2022
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Moving Charges & Magnetism

153139 A long straight wire carries a current of $20 \mathrm{~A}$. The maximum force experienced by an electron moving at a speed of $100 \mathrm{~km} / \mathrm{s}$, at a distance of $6.4 \mathrm{~cm}$ from the wire is

1 $10^{-18} \mathrm{~N}$
2 $10^{-19} \mathrm{~N}$
3 $5 \times 10^{-17} \mathrm{~N}$
4 $8 \times 10^{-18} \mathrm{~N}$
TS EAMCET 31.07.2022
Moving Charges & Magnetism

153140 Two infinitely long thin wires are placed at (1 $\mathrm{cm}, 0 \mathrm{~cm})$ and $(2 \mathrm{~cm}, 0 \mathrm{~cm})$ as shown in the figure,

The same current $i$ flows in both the wires in the same direction, say, into the page. Let the magnetic field at the origin due to these wires is $\vec{B}$. If $B_{0}$ is the magnitude of the magnetic field if only the wire at $(1 \mathrm{~cm}, 0 \mathrm{~cm})$ was present, then the value of $B / B_{0}$ is

1 $3 / 2$
2 $2 / 3$
3 $1 / 2$
4 2
TS EAMCET 20.07.2022
Moving Charges & Magnetism

153135 Assertion (A) : The magnetic field lines are continuous and form closed loops.
Reason (R) : Magnetic monopole does not exist. The correct option among the following is

1 (A) is true and (R) is the correct explanation for $(\mathrm{A})$
2 (A) is true. ( $\mathrm{R}$ ) is not the correct explanation of (A)
3 (A) is true but (R) is false
4 (A) is false but (R) is true
TS EAMCET 18.07.2022
Moving Charges & Magnetism

153141 A current is flowing in a circular coil of radius $r$ and the magnetic field at the centre is $B_{0}$. At what distance from the centre on the axis of the coil is the magnetic field $\mathrm{B}_{\mathbf{0}} / 27$ ?

1 $\sqrt{3}$
2 $2 \sqrt{2} \mathrm{r}$
3 $\sqrt{2} \mathrm{r}$
4 $2 \mathrm{r}$
Karnataka CET 2022
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Moving Charges & Magnetism

153139 A long straight wire carries a current of $20 \mathrm{~A}$. The maximum force experienced by an electron moving at a speed of $100 \mathrm{~km} / \mathrm{s}$, at a distance of $6.4 \mathrm{~cm}$ from the wire is

1 $10^{-18} \mathrm{~N}$
2 $10^{-19} \mathrm{~N}$
3 $5 \times 10^{-17} \mathrm{~N}$
4 $8 \times 10^{-18} \mathrm{~N}$
TS EAMCET 31.07.2022
Moving Charges & Magnetism

153140 Two infinitely long thin wires are placed at (1 $\mathrm{cm}, 0 \mathrm{~cm})$ and $(2 \mathrm{~cm}, 0 \mathrm{~cm})$ as shown in the figure,

The same current $i$ flows in both the wires in the same direction, say, into the page. Let the magnetic field at the origin due to these wires is $\vec{B}$. If $B_{0}$ is the magnitude of the magnetic field if only the wire at $(1 \mathrm{~cm}, 0 \mathrm{~cm})$ was present, then the value of $B / B_{0}$ is

1 $3 / 2$
2 $2 / 3$
3 $1 / 2$
4 2
TS EAMCET 20.07.2022
Moving Charges & Magnetism

153135 Assertion (A) : The magnetic field lines are continuous and form closed loops.
Reason (R) : Magnetic monopole does not exist. The correct option among the following is

1 (A) is true and (R) is the correct explanation for $(\mathrm{A})$
2 (A) is true. ( $\mathrm{R}$ ) is not the correct explanation of (A)
3 (A) is true but (R) is false
4 (A) is false but (R) is true
TS EAMCET 18.07.2022
Moving Charges & Magnetism

153141 A current is flowing in a circular coil of radius $r$ and the magnetic field at the centre is $B_{0}$. At what distance from the centre on the axis of the coil is the magnetic field $\mathrm{B}_{\mathbf{0}} / 27$ ?

1 $\sqrt{3}$
2 $2 \sqrt{2} \mathrm{r}$
3 $\sqrt{2} \mathrm{r}$
4 $2 \mathrm{r}$
Karnataka CET 2022
Join With Us for More Updates
Moving Charges & Magnetism

153139 A long straight wire carries a current of $20 \mathrm{~A}$. The maximum force experienced by an electron moving at a speed of $100 \mathrm{~km} / \mathrm{s}$, at a distance of $6.4 \mathrm{~cm}$ from the wire is

1 $10^{-18} \mathrm{~N}$
2 $10^{-19} \mathrm{~N}$
3 $5 \times 10^{-17} \mathrm{~N}$
4 $8 \times 10^{-18} \mathrm{~N}$
TS EAMCET 31.07.2022
Moving Charges & Magnetism

153140 Two infinitely long thin wires are placed at (1 $\mathrm{cm}, 0 \mathrm{~cm})$ and $(2 \mathrm{~cm}, 0 \mathrm{~cm})$ as shown in the figure,

The same current $i$ flows in both the wires in the same direction, say, into the page. Let the magnetic field at the origin due to these wires is $\vec{B}$. If $B_{0}$ is the magnitude of the magnetic field if only the wire at $(1 \mathrm{~cm}, 0 \mathrm{~cm})$ was present, then the value of $B / B_{0}$ is

1 $3 / 2$
2 $2 / 3$
3 $1 / 2$
4 2
TS EAMCET 20.07.2022
Moving Charges & Magnetism

153135 Assertion (A) : The magnetic field lines are continuous and form closed loops.
Reason (R) : Magnetic monopole does not exist. The correct option among the following is

1 (A) is true and (R) is the correct explanation for $(\mathrm{A})$
2 (A) is true. ( $\mathrm{R}$ ) is not the correct explanation of (A)
3 (A) is true but (R) is false
4 (A) is false but (R) is true
TS EAMCET 18.07.2022
Moving Charges & Magnetism

153141 A current is flowing in a circular coil of radius $r$ and the magnetic field at the centre is $B_{0}$. At what distance from the centre on the axis of the coil is the magnetic field $\mathrm{B}_{\mathbf{0}} / 27$ ?

1 $\sqrt{3}$
2 $2 \sqrt{2} \mathrm{r}$
3 $\sqrt{2} \mathrm{r}$
4 $2 \mathrm{r}$
Karnataka CET 2022
For More Updates join with Us