Torque & Magnetic Dipole
PHXII04:MOVING CHARGES AND MAGNETISM

363024 The magnetic moments associated with two closely wound circular coils \(A\) and \(B\) of radius \({r_A} = 10\;cm\) and \({r_B} = 20\;cm\) respectively are equal if (Where \(N_{A}, I_{A}\) and \(N_{B}, I_{B}\) are number of turn and current of \(A\) and \(B\) respectively)

1 \(N_{A}=2 N_{B}\)
2 \(2 N_{A} I_{A}=N_{B} I_{B}\)
3 \(N_{A} I_{A}=4 N_{B} I_{B}\)
4 \(4 N_{A} I_{A}=N_{B} I_{B}\)
PHXII04:MOVING CHARGES AND MAGNETISM

363025 Two wires of same length are shaped into a square and a circle. If they carry same current, ratio of the effective magnetic moment will be

1 \(\pi: 2\)
2 \(2: \pi\)
3 \(\pi: 4\)
4 \(4: \pi\)
PHXII04:MOVING CHARGES AND MAGNETISM

363026 The magnetic dipole moment of a current loop is independent of

1 Magnetic field in which it is lying
2 Number of turns
3 Area of the loop
4 Current in the loop
PHXII04:MOVING CHARGES AND MAGNETISM

363027 A straight wire carrying current \(i\) is turned into a circular loop. If the magnitude of magnetic moment associated with it in \(MKS\) unit is \(M\), the length of wire will be

1 \(\dfrac{4 \pi}{M}\)
2 \(\sqrt{\dfrac{4 \pi M}{i}}\)
3 \(\sqrt{\dfrac{4 \pi i}{M}}\)
4 \(\dfrac{M \pi}{i}\)
PHXII04:MOVING CHARGES AND MAGNETISM

363024 The magnetic moments associated with two closely wound circular coils \(A\) and \(B\) of radius \({r_A} = 10\;cm\) and \({r_B} = 20\;cm\) respectively are equal if (Where \(N_{A}, I_{A}\) and \(N_{B}, I_{B}\) are number of turn and current of \(A\) and \(B\) respectively)

1 \(N_{A}=2 N_{B}\)
2 \(2 N_{A} I_{A}=N_{B} I_{B}\)
3 \(N_{A} I_{A}=4 N_{B} I_{B}\)
4 \(4 N_{A} I_{A}=N_{B} I_{B}\)
PHXII04:MOVING CHARGES AND MAGNETISM

363025 Two wires of same length are shaped into a square and a circle. If they carry same current, ratio of the effective magnetic moment will be

1 \(\pi: 2\)
2 \(2: \pi\)
3 \(\pi: 4\)
4 \(4: \pi\)
PHXII04:MOVING CHARGES AND MAGNETISM

363026 The magnetic dipole moment of a current loop is independent of

1 Magnetic field in which it is lying
2 Number of turns
3 Area of the loop
4 Current in the loop
PHXII04:MOVING CHARGES AND MAGNETISM

363027 A straight wire carrying current \(i\) is turned into a circular loop. If the magnitude of magnetic moment associated with it in \(MKS\) unit is \(M\), the length of wire will be

1 \(\dfrac{4 \pi}{M}\)
2 \(\sqrt{\dfrac{4 \pi M}{i}}\)
3 \(\sqrt{\dfrac{4 \pi i}{M}}\)
4 \(\dfrac{M \pi}{i}\)
PHXII04:MOVING CHARGES AND MAGNETISM

363024 The magnetic moments associated with two closely wound circular coils \(A\) and \(B\) of radius \({r_A} = 10\;cm\) and \({r_B} = 20\;cm\) respectively are equal if (Where \(N_{A}, I_{A}\) and \(N_{B}, I_{B}\) are number of turn and current of \(A\) and \(B\) respectively)

1 \(N_{A}=2 N_{B}\)
2 \(2 N_{A} I_{A}=N_{B} I_{B}\)
3 \(N_{A} I_{A}=4 N_{B} I_{B}\)
4 \(4 N_{A} I_{A}=N_{B} I_{B}\)
PHXII04:MOVING CHARGES AND MAGNETISM

363025 Two wires of same length are shaped into a square and a circle. If they carry same current, ratio of the effective magnetic moment will be

1 \(\pi: 2\)
2 \(2: \pi\)
3 \(\pi: 4\)
4 \(4: \pi\)
PHXII04:MOVING CHARGES AND MAGNETISM

363026 The magnetic dipole moment of a current loop is independent of

1 Magnetic field in which it is lying
2 Number of turns
3 Area of the loop
4 Current in the loop
PHXII04:MOVING CHARGES AND MAGNETISM

363027 A straight wire carrying current \(i\) is turned into a circular loop. If the magnitude of magnetic moment associated with it in \(MKS\) unit is \(M\), the length of wire will be

1 \(\dfrac{4 \pi}{M}\)
2 \(\sqrt{\dfrac{4 \pi M}{i}}\)
3 \(\sqrt{\dfrac{4 \pi i}{M}}\)
4 \(\dfrac{M \pi}{i}\)
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
PHXII04:MOVING CHARGES AND MAGNETISM

363024 The magnetic moments associated with two closely wound circular coils \(A\) and \(B\) of radius \({r_A} = 10\;cm\) and \({r_B} = 20\;cm\) respectively are equal if (Where \(N_{A}, I_{A}\) and \(N_{B}, I_{B}\) are number of turn and current of \(A\) and \(B\) respectively)

1 \(N_{A}=2 N_{B}\)
2 \(2 N_{A} I_{A}=N_{B} I_{B}\)
3 \(N_{A} I_{A}=4 N_{B} I_{B}\)
4 \(4 N_{A} I_{A}=N_{B} I_{B}\)
PHXII04:MOVING CHARGES AND MAGNETISM

363025 Two wires of same length are shaped into a square and a circle. If they carry same current, ratio of the effective magnetic moment will be

1 \(\pi: 2\)
2 \(2: \pi\)
3 \(\pi: 4\)
4 \(4: \pi\)
PHXII04:MOVING CHARGES AND MAGNETISM

363026 The magnetic dipole moment of a current loop is independent of

1 Magnetic field in which it is lying
2 Number of turns
3 Area of the loop
4 Current in the loop
PHXII04:MOVING CHARGES AND MAGNETISM

363027 A straight wire carrying current \(i\) is turned into a circular loop. If the magnitude of magnetic moment associated with it in \(MKS\) unit is \(M\), the length of wire will be

1 \(\dfrac{4 \pi}{M}\)
2 \(\sqrt{\dfrac{4 \pi M}{i}}\)
3 \(\sqrt{\dfrac{4 \pi i}{M}}\)
4 \(\dfrac{M \pi}{i}\)