NEET Test Series from KOTA - 10 Papers In MS WORD
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Moving Charges & Magnetism
153247
Which of the following while in motion cannot be deflected by magnetic field?
1 Protons
2 Cathode rays
3 Alpha particles
4 Neutrons
Explanation:
D The protons, cathode rays and the alpha particles are charged particles, so these are deflected in the magnetic field. But neutrons have not any charge, so these are not deflected by magnetic field.
UPSEE - 2008
Moving Charges & Magnetism
153256
Two parallel wires carrying currents in opposite directions
1 repel each other
2 attract each other
3 cancel each other's field
4 neither attract nor repel
Explanation:
A When two parallel wires carry current in opposite direction then they will repel each other. Because two magnetic fields created by it and wire also repel each other. But when two current flowing in same direction then they will attract each other.
CG PET- 2005
Moving Charges & Magnetism
153267
An electric wire of resistance $R$ carries a current $I$. When a magnetic field is applied perpendicular to the wire, the
1 current I will decrease
2 current I will increase
3 resistance $\mathrm{R}$ will increase
4 resistance $\mathrm{R}$ will decrease
Explanation:
B When magnetic field is applied perpendicular to the wire then current will increase.
UPSEE - 2011
Moving Charges & Magnetism
153289
The direction of magnetic field $\mathrm{dB}$ due to current element dI at a distance $r$ is the direction of
1 $\mathrm{r} \times \mathrm{d} l$
2 $\mathrm{d} l \times \mathrm{r}$
3 $(\mathrm{rd} l) \mathrm{r}$
4 $\mathrm{d} l$
Explanation:
B The direction of $\mathrm{dB}$ is the direction of vector $\mathrm{d} l \times \mathrm{r}$. From right hand screw rule, if we placed a right handed screw at the point where the magnetic field is needed to be determined and turn its handle from $\mathrm{d} l$ to $\mathrm{r}$, then the direction in which the screw advances give the direction of magnetic field $\mathrm{dB}$.
153247
Which of the following while in motion cannot be deflected by magnetic field?
1 Protons
2 Cathode rays
3 Alpha particles
4 Neutrons
Explanation:
D The protons, cathode rays and the alpha particles are charged particles, so these are deflected in the magnetic field. But neutrons have not any charge, so these are not deflected by magnetic field.
UPSEE - 2008
Moving Charges & Magnetism
153256
Two parallel wires carrying currents in opposite directions
1 repel each other
2 attract each other
3 cancel each other's field
4 neither attract nor repel
Explanation:
A When two parallel wires carry current in opposite direction then they will repel each other. Because two magnetic fields created by it and wire also repel each other. But when two current flowing in same direction then they will attract each other.
CG PET- 2005
Moving Charges & Magnetism
153267
An electric wire of resistance $R$ carries a current $I$. When a magnetic field is applied perpendicular to the wire, the
1 current I will decrease
2 current I will increase
3 resistance $\mathrm{R}$ will increase
4 resistance $\mathrm{R}$ will decrease
Explanation:
B When magnetic field is applied perpendicular to the wire then current will increase.
UPSEE - 2011
Moving Charges & Magnetism
153289
The direction of magnetic field $\mathrm{dB}$ due to current element dI at a distance $r$ is the direction of
1 $\mathrm{r} \times \mathrm{d} l$
2 $\mathrm{d} l \times \mathrm{r}$
3 $(\mathrm{rd} l) \mathrm{r}$
4 $\mathrm{d} l$
Explanation:
B The direction of $\mathrm{dB}$ is the direction of vector $\mathrm{d} l \times \mathrm{r}$. From right hand screw rule, if we placed a right handed screw at the point where the magnetic field is needed to be determined and turn its handle from $\mathrm{d} l$ to $\mathrm{r}$, then the direction in which the screw advances give the direction of magnetic field $\mathrm{dB}$.
153247
Which of the following while in motion cannot be deflected by magnetic field?
1 Protons
2 Cathode rays
3 Alpha particles
4 Neutrons
Explanation:
D The protons, cathode rays and the alpha particles are charged particles, so these are deflected in the magnetic field. But neutrons have not any charge, so these are not deflected by magnetic field.
UPSEE - 2008
Moving Charges & Magnetism
153256
Two parallel wires carrying currents in opposite directions
1 repel each other
2 attract each other
3 cancel each other's field
4 neither attract nor repel
Explanation:
A When two parallel wires carry current in opposite direction then they will repel each other. Because two magnetic fields created by it and wire also repel each other. But when two current flowing in same direction then they will attract each other.
CG PET- 2005
Moving Charges & Magnetism
153267
An electric wire of resistance $R$ carries a current $I$. When a magnetic field is applied perpendicular to the wire, the
1 current I will decrease
2 current I will increase
3 resistance $\mathrm{R}$ will increase
4 resistance $\mathrm{R}$ will decrease
Explanation:
B When magnetic field is applied perpendicular to the wire then current will increase.
UPSEE - 2011
Moving Charges & Magnetism
153289
The direction of magnetic field $\mathrm{dB}$ due to current element dI at a distance $r$ is the direction of
1 $\mathrm{r} \times \mathrm{d} l$
2 $\mathrm{d} l \times \mathrm{r}$
3 $(\mathrm{rd} l) \mathrm{r}$
4 $\mathrm{d} l$
Explanation:
B The direction of $\mathrm{dB}$ is the direction of vector $\mathrm{d} l \times \mathrm{r}$. From right hand screw rule, if we placed a right handed screw at the point where the magnetic field is needed to be determined and turn its handle from $\mathrm{d} l$ to $\mathrm{r}$, then the direction in which the screw advances give the direction of magnetic field $\mathrm{dB}$.
153247
Which of the following while in motion cannot be deflected by magnetic field?
1 Protons
2 Cathode rays
3 Alpha particles
4 Neutrons
Explanation:
D The protons, cathode rays and the alpha particles are charged particles, so these are deflected in the magnetic field. But neutrons have not any charge, so these are not deflected by magnetic field.
UPSEE - 2008
Moving Charges & Magnetism
153256
Two parallel wires carrying currents in opposite directions
1 repel each other
2 attract each other
3 cancel each other's field
4 neither attract nor repel
Explanation:
A When two parallel wires carry current in opposite direction then they will repel each other. Because two magnetic fields created by it and wire also repel each other. But when two current flowing in same direction then they will attract each other.
CG PET- 2005
Moving Charges & Magnetism
153267
An electric wire of resistance $R$ carries a current $I$. When a magnetic field is applied perpendicular to the wire, the
1 current I will decrease
2 current I will increase
3 resistance $\mathrm{R}$ will increase
4 resistance $\mathrm{R}$ will decrease
Explanation:
B When magnetic field is applied perpendicular to the wire then current will increase.
UPSEE - 2011
Moving Charges & Magnetism
153289
The direction of magnetic field $\mathrm{dB}$ due to current element dI at a distance $r$ is the direction of
1 $\mathrm{r} \times \mathrm{d} l$
2 $\mathrm{d} l \times \mathrm{r}$
3 $(\mathrm{rd} l) \mathrm{r}$
4 $\mathrm{d} l$
Explanation:
B The direction of $\mathrm{dB}$ is the direction of vector $\mathrm{d} l \times \mathrm{r}$. From right hand screw rule, if we placed a right handed screw at the point where the magnetic field is needed to be determined and turn its handle from $\mathrm{d} l$ to $\mathrm{r}$, then the direction in which the screw advances give the direction of magnetic field $\mathrm{dB}$.
