Q. No.
A positively charged particle descends vertically. In which direction will the horizontal component of the earth's magnetic field deflect?
1. east
2. west
3. north
4. south
What is the magnetic dipole moment of the given loop?
| 1. | \({ 5 \over 2} \pi R^2I\) | 2. | \(3 \pi R^2I\) |
| 3. | \({ 3 \over 2} \pi R^2I\) | 4. | \(5 \pi R^2I\) |
The magnetic field at center due to the orbital motion of the electron in the hydrogen atom is :
1. 12.5 tesla
2. 5 tesla
3. 24 tesla
4. 1 tesla
The figure shows a particle of charge q and mass m moving with velocity v along the x-axis enters a region of the uniform magnetic field. The minimum value of v so that the charge q is deflected by an angle is
1.
2.
3.
4.
An electron is traveling along the x-direction. It encounters a magnetic field in the y-direction. Its subsequent motion will be:
1. Straight-line along the x-direction
2. A circle in the xz-plane
3. A circle in the yz-plane
4. A circle in the xy-plane
| 1. | \(B\) acts along the \(x\text-\)axis |
| 2. | \(B\) acts along the \(y\text-\)axis |
| 3. | \(B\) acts along the \(z\text-\)axis |
| 4. | \(B\) can act along any of the above direction for the net force to be zero |
1. \(10~\Omega\)
2. \(20~\Omega\)
3. \(8~\Omega\)
4. \(5~\Omega\)
The dots in the figure depict a magnetic field that is perpendicular to the plane of the paper and emanates from it. The trajectory of a particle in the plane of the paper is depicted by the curve \(ABC\). What exactly is the particle?
| 1. | Proton. | 2. | Electron. |
| 3. | Neutron. | 4. | It cannot be predicted. |
A long solenoid has 800 turns per meter length of the solenoid. A current of 1.6 A flows through it. The magnetic induction at the end of the solenoid on its axis is:
1.
2.
3.
4.
The unit of reduction factor of the tangent galvanometer is
(1) Ampere
(2) Gauss
(3) Radian
(4) None of these
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