A current-carrying closed Loop in the form of a right isosceles triangle ABC is placed in xy plane in a uniform magnetic field acting along the y-axis as shown in the figure. If the magnetic force on the arm AC is , then force on the arm BC and AB are respectively
(1) zero, zero
(2)
(3)
(4)
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A uniform electric field and a uniform magnetic field are acting in the same direction in a certain region. If a proton is projected in this region such that its velocity is pointed along the direction of fields, then the proton :
1. will turn towards the left of the direction of motion
2. will turn towards the right of the direction of motion
3. will speed up
4. will slow down
Difficulty Level:
When a proton is released from rest in a room, it starts with an initial acceleration towards the east. When it is projected towards the north with a speed , it moves with initial acceleration towards east. The electric and magnetic fields in the room are -
1.
2.
3.
4.
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If the planes of two identical concentric coils are the perpendicular and magnetic moment of each coil is M, then the resultant magnetic moment of the two coil system is
1. M
2.
3. 3M
4. 2M
Difficulty Level:
Which of the following graph correctly represents the variation of magnetic field induction with distance due to a thin wire carrying current?
1.
2.
3.
4.
Difficulty Level:
When an electron enters perpendicularly in a magnetic field with velocity v, time period of its revolution is T. If it enters in the same magnetic field with a velocity 2v, then its time period will be:
1. 2T
2. 4T
3.
4. T
Difficulty Level:
A positively charged particle falls vertically downwards. The horizontal component of the earth's magnetic field will deflect it towards:
(1) east
(2) west
(3) north
(4) south
Difficulty Level:
The magnetic dipole moment of the given loop is:
1.
2.
3.
4.
Difficulty Level:
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
Difficulty Level:
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.
Difficulty Level: