(B) According to the Biot-Savart Law,the magnitude of the magnetic field $B$ produced by a long straight current-carrying conductor at a distance $r$

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(B) According to the Biot-Savart Law,the magnitude of the magnetic field $B$ produced by a long straight current-carrying conductor at a distance $r$ is given by the formula $B = \frac{\mu_0 I}{2 \pi r}$.Since both points $P$ and $Q$ are at the same distance $r$ from the conductor,the magnitude of the magnetic field at both points will be equal.Therefore,the magnetic field at $P$ is the same as the magnetic field at $Q$.

Class 12 Physics Moving Charges and Magnetism Biot-Savart's Law and its application

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$A$ vertical straight conductor carries a current vertically upwards. $A$ point $P$ lies to the east of it at a small distance and another point $Q$ lies to the west at the same distance. The magnetic field at $P$ is

A
Greater than at $Q$
B
Same as at $Q$
C
Less than at $Q$
D
Greater or less than at $Q$ depending upon the strength of the current

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Moving Charges and Magnetism

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Biot-Savart's Law and its application

$A$ steady current $I$ flows through a wire with one end at $O$ and the other end extending up to infinity as shown in the figure. The magnetic field at a point $P$, located at a distance $d$ from $O$, is

DifficultTS EAMCET 2018

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Assertion: In electric circuits,wires carrying currents in opposite directions are often twisted together.
Reason: If the wires are not twisted together,the combination of the wires forms a current loop,and the magnetic field generated by the loop might affect adjacent circuits or components.

EasyAIIMS 2008

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The dimensions of the ratio of magnetic flux $(\phi)$ and permeability $(\mu)$ are

EasyKCET 2018

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In the current-carrying conductor $(AOCDEFG)$ as shown,the magnetic induction at the point $O$ is ($R_1$ and $R_2$ are radii of arcs $CD$ and $EF$ respectively,$I$ = current in the loop,$\mu_0$ = permeability of free space).

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An electron of mass $m$ is revolving around the nucleus in a circular orbit of radius $r$ and has angular momentum $L$. The magnetic field produced by the electron at the centre of the orbit is ($e = \text{electric charge}$, $\mu_{0} = \text{permeability of free space}$)

MediumMHT CET 2020

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$A$ vertical straight conductor carries a current vertically upwards. $A$ point $P$ lies to the east of it at a small distance and another point $Q$ lies to the west at the same distance. The magnetic field at $P$ is

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$A$ steady current $I$ flows through a wire with one end at $O$ and the other end extending up to infinity as shown in the figure. The magnetic field at a point $P$, located at a distance $d$ from $O$, is

Assertion: In electric circuits,wires carrying currents in opposite directions are often twisted together.Reason: If the wires are not twisted together,the combination of the wires forms a current loop,and the magnetic field generated by the loop might affect adjacent circuits or components.

The dimensions of the ratio of magnetic flux $(\phi)$ and permeability $(\mu)$ are

In the current-carrying conductor $(AOCDEFG)$ as shown,the magnetic induction at the point $O$ is ($R_1$ and $R_2$ are radii of arcs $CD$ and $EF$ respectively,$I$ = current in the loop,$\mu_0$ = permeability of free space).

An electron of mass $m$ is revolving around the nucleus in a circular orbit of radius $r$ and has angular momentum $L$. The magnetic field produced by the electron at the centre of the orbit is ($e = \text{electric charge}$, $\mu_{0} = \text{permeability of free space}$)

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Assertion: In electric circuits,wires carrying currents in opposite directions are often twisted together.
Reason: If the wires are not twisted together,the combination of the wires forms a current loop,and the magnetic field generated by the loop might affect adjacent circuits or components.