153169
Magnetic field dB to a current element at any point on its axis is
1 minimum
2 zero
3 varies between minimum and maximum
4 depends on the position of the point
Explanation:
B Magnetic field dB to a current element at any point on its axis will be zero $\because \quad \mathrm{dB}=\frac{\mu_{0} \mathrm{i}}{4 \pi} \frac{\mathrm{d} \vec{l} \times \overrightarrow{\mathrm{r}}}{\left(\mathrm{r}^{3}\right)}$ $\mathrm{d} \vec{l} \times \overrightarrow{\mathrm{r}}=\mathrm{d} l \mathrm{r} \sin \theta$ $\mathrm{B}_{\text {minimum }}=0, \text { when } \sin \theta=0$
AP EAMCET (23.09.2020) Shift-I
Moving Charges & Magnetism
153174
The ratio of the magnetic field inside a solenoid at an axial point well inside and at an axial end point is
1 2
2 $\frac{1}{2}$
3 1
4 $\frac{3}{2}$
Explanation:
A We know, Magnetic field inside solenoid, $B_{1}=\mu_{0} \times \mathrm{n} \times \mathrm{I}$ Magnetic field near the axial end point, $B_{2}=\frac{\mu_{o} \times n \times I}{2}$ Hence, $\frac{\mathrm{B}_{1}}{\mathrm{~B}_{2}}=\frac{\mu_{\mathrm{o}} \times \mathrm{n} \times \mathrm{I}}{\frac{\mu_{\mathrm{o}} \times \mathrm{n} \times \mathrm{I}}{2}}=\frac{2}{1}=2$
TS- EAMCET.11.09.2020
Moving Charges & Magnetism
153190
According to Oersted experiment, WRONG statement is that
1 current carrying conductor does not produce magnetic field around it
2 the direction of magnetic field can be obtained by using right hand rule
3 current carrying conductor produces magnetic field around it
4 the strength of magnetic field depends upon the current flowing through the conductor
Explanation:
A According to Oersted experiment a magnetic compass needle placed near a current carrying wire. When current flows in the circuit, the electron moving in the wire give rise to a magnetic field around it. - The direction of the north of the compass needle points can be found by the current using the right hand rule. - Oersted discovered the relationship between electricity and magnetism. In his experiment he noticed that when a magnetic compass is placed near a current carrying wire it produces a magnetic field around it which deflects the compass needle.
MHT-CET 2019
Moving Charges & Magnetism
153208
A long cylindrical wire carrying current of 10amp. Has radius of $5 \mathrm{~mm}$, then find the magnetic field induction at a point $2 \mathrm{~mm}$ away from the centre of the wire.
153169
Magnetic field dB to a current element at any point on its axis is
1 minimum
2 zero
3 varies between minimum and maximum
4 depends on the position of the point
Explanation:
B Magnetic field dB to a current element at any point on its axis will be zero $\because \quad \mathrm{dB}=\frac{\mu_{0} \mathrm{i}}{4 \pi} \frac{\mathrm{d} \vec{l} \times \overrightarrow{\mathrm{r}}}{\left(\mathrm{r}^{3}\right)}$ $\mathrm{d} \vec{l} \times \overrightarrow{\mathrm{r}}=\mathrm{d} l \mathrm{r} \sin \theta$ $\mathrm{B}_{\text {minimum }}=0, \text { when } \sin \theta=0$
AP EAMCET (23.09.2020) Shift-I
Moving Charges & Magnetism
153174
The ratio of the magnetic field inside a solenoid at an axial point well inside and at an axial end point is
1 2
2 $\frac{1}{2}$
3 1
4 $\frac{3}{2}$
Explanation:
A We know, Magnetic field inside solenoid, $B_{1}=\mu_{0} \times \mathrm{n} \times \mathrm{I}$ Magnetic field near the axial end point, $B_{2}=\frac{\mu_{o} \times n \times I}{2}$ Hence, $\frac{\mathrm{B}_{1}}{\mathrm{~B}_{2}}=\frac{\mu_{\mathrm{o}} \times \mathrm{n} \times \mathrm{I}}{\frac{\mu_{\mathrm{o}} \times \mathrm{n} \times \mathrm{I}}{2}}=\frac{2}{1}=2$
TS- EAMCET.11.09.2020
Moving Charges & Magnetism
153190
According to Oersted experiment, WRONG statement is that
1 current carrying conductor does not produce magnetic field around it
2 the direction of magnetic field can be obtained by using right hand rule
3 current carrying conductor produces magnetic field around it
4 the strength of magnetic field depends upon the current flowing through the conductor
Explanation:
A According to Oersted experiment a magnetic compass needle placed near a current carrying wire. When current flows in the circuit, the electron moving in the wire give rise to a magnetic field around it. - The direction of the north of the compass needle points can be found by the current using the right hand rule. - Oersted discovered the relationship between electricity and magnetism. In his experiment he noticed that when a magnetic compass is placed near a current carrying wire it produces a magnetic field around it which deflects the compass needle.
MHT-CET 2019
Moving Charges & Magnetism
153208
A long cylindrical wire carrying current of 10amp. Has radius of $5 \mathrm{~mm}$, then find the magnetic field induction at a point $2 \mathrm{~mm}$ away from the centre of the wire.
NEET Test Series from KOTA - 10 Papers In MS WORD
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Moving Charges & Magnetism
153169
Magnetic field dB to a current element at any point on its axis is
1 minimum
2 zero
3 varies between minimum and maximum
4 depends on the position of the point
Explanation:
B Magnetic field dB to a current element at any point on its axis will be zero $\because \quad \mathrm{dB}=\frac{\mu_{0} \mathrm{i}}{4 \pi} \frac{\mathrm{d} \vec{l} \times \overrightarrow{\mathrm{r}}}{\left(\mathrm{r}^{3}\right)}$ $\mathrm{d} \vec{l} \times \overrightarrow{\mathrm{r}}=\mathrm{d} l \mathrm{r} \sin \theta$ $\mathrm{B}_{\text {minimum }}=0, \text { when } \sin \theta=0$
AP EAMCET (23.09.2020) Shift-I
Moving Charges & Magnetism
153174
The ratio of the magnetic field inside a solenoid at an axial point well inside and at an axial end point is
1 2
2 $\frac{1}{2}$
3 1
4 $\frac{3}{2}$
Explanation:
A We know, Magnetic field inside solenoid, $B_{1}=\mu_{0} \times \mathrm{n} \times \mathrm{I}$ Magnetic field near the axial end point, $B_{2}=\frac{\mu_{o} \times n \times I}{2}$ Hence, $\frac{\mathrm{B}_{1}}{\mathrm{~B}_{2}}=\frac{\mu_{\mathrm{o}} \times \mathrm{n} \times \mathrm{I}}{\frac{\mu_{\mathrm{o}} \times \mathrm{n} \times \mathrm{I}}{2}}=\frac{2}{1}=2$
TS- EAMCET.11.09.2020
Moving Charges & Magnetism
153190
According to Oersted experiment, WRONG statement is that
1 current carrying conductor does not produce magnetic field around it
2 the direction of magnetic field can be obtained by using right hand rule
3 current carrying conductor produces magnetic field around it
4 the strength of magnetic field depends upon the current flowing through the conductor
Explanation:
A According to Oersted experiment a magnetic compass needle placed near a current carrying wire. When current flows in the circuit, the electron moving in the wire give rise to a magnetic field around it. - The direction of the north of the compass needle points can be found by the current using the right hand rule. - Oersted discovered the relationship between electricity and magnetism. In his experiment he noticed that when a magnetic compass is placed near a current carrying wire it produces a magnetic field around it which deflects the compass needle.
MHT-CET 2019
Moving Charges & Magnetism
153208
A long cylindrical wire carrying current of 10amp. Has radius of $5 \mathrm{~mm}$, then find the magnetic field induction at a point $2 \mathrm{~mm}$ away from the centre of the wire.
153169
Magnetic field dB to a current element at any point on its axis is
1 minimum
2 zero
3 varies between minimum and maximum
4 depends on the position of the point
Explanation:
B Magnetic field dB to a current element at any point on its axis will be zero $\because \quad \mathrm{dB}=\frac{\mu_{0} \mathrm{i}}{4 \pi} \frac{\mathrm{d} \vec{l} \times \overrightarrow{\mathrm{r}}}{\left(\mathrm{r}^{3}\right)}$ $\mathrm{d} \vec{l} \times \overrightarrow{\mathrm{r}}=\mathrm{d} l \mathrm{r} \sin \theta$ $\mathrm{B}_{\text {minimum }}=0, \text { when } \sin \theta=0$
AP EAMCET (23.09.2020) Shift-I
Moving Charges & Magnetism
153174
The ratio of the magnetic field inside a solenoid at an axial point well inside and at an axial end point is
1 2
2 $\frac{1}{2}$
3 1
4 $\frac{3}{2}$
Explanation:
A We know, Magnetic field inside solenoid, $B_{1}=\mu_{0} \times \mathrm{n} \times \mathrm{I}$ Magnetic field near the axial end point, $B_{2}=\frac{\mu_{o} \times n \times I}{2}$ Hence, $\frac{\mathrm{B}_{1}}{\mathrm{~B}_{2}}=\frac{\mu_{\mathrm{o}} \times \mathrm{n} \times \mathrm{I}}{\frac{\mu_{\mathrm{o}} \times \mathrm{n} \times \mathrm{I}}{2}}=\frac{2}{1}=2$
TS- EAMCET.11.09.2020
Moving Charges & Magnetism
153190
According to Oersted experiment, WRONG statement is that
1 current carrying conductor does not produce magnetic field around it
2 the direction of magnetic field can be obtained by using right hand rule
3 current carrying conductor produces magnetic field around it
4 the strength of magnetic field depends upon the current flowing through the conductor
Explanation:
A According to Oersted experiment a magnetic compass needle placed near a current carrying wire. When current flows in the circuit, the electron moving in the wire give rise to a magnetic field around it. - The direction of the north of the compass needle points can be found by the current using the right hand rule. - Oersted discovered the relationship between electricity and magnetism. In his experiment he noticed that when a magnetic compass is placed near a current carrying wire it produces a magnetic field around it which deflects the compass needle.
MHT-CET 2019
Moving Charges & Magnetism
153208
A long cylindrical wire carrying current of 10amp. Has radius of $5 \mathrm{~mm}$, then find the magnetic field induction at a point $2 \mathrm{~mm}$ away from the centre of the wire.
