Electromagnetism Quiz 1

Question 1

The motion of $$4$$ particles, an $$alpha -$$ particle, a proton, an electron, and a neutron is represented in the diagram below. They all begin at the same point and have the same common velocity $$V$$. There is a magnetic field in space that is pointing towards the paper. The motion of a neutron and an $$alpha$$ particle is depicted by $$ \ $$<img  src="https://cmds-vedantu.s3.ap-southeast-1.amazonaws.com/prod/question-sets/23412657-a6d3-442d-9c3f-23293f1b94d14971795078383774911.png"/>

Accepted Answer

$$\left( 3 \right)$$ and $$\left( 2 \right)$$

Answer

$$\left( 3 \right)$$ and $$\left( 1 \right)$$

Answer

$$\left( 4 \right)$$ and $$\left( 1 \right)$$

Answer

$$\left( 4 \right)$$ and $$\left( 2 \right)$$

Question 2

A charge particle with charge $$Q$$ enters in a uniform magnetic field perpendicular to field with different speeds as $${{V}_{0}},2{{V}_{0}},3{{V}_{0}},4{{V}_{0}}$$. If the dimension or region of the magnetic field is $$\left( b	imes b ight){{m}^{2}}$$ then the maximum time spent by a charged particle in the field region with velocity.

Accepted Answer

None of above

Answer

$${{V}_{0}}$$

Answer

$$2{{V}_{0}}$$

Answer

$$3{{V}_{0}}$$

Question 3

A charge particle is moving in a magnetic field. Motion of particles can be in the form of helix if.

Accepted Answer

angle should not be a multiple of $$\dfrac{\pi }{2}$$

Answer

angle between $$\vec{V}$$ and $$\vec{B}$$ is zero

Answer

charge particle moves in straight line

Answer

angle should be a multiple of $$\dfrac{\pi }{2}$$

Question 4

In a space, region $$\left( 1 \right)$$ is separated by region $$\left( 2 \right)$$ through an imaginary boundary $$XX'.$$ If region $$2$$ has magnetic field $$B={{B}_{o}}\vec{K},$$ then a object of charge $$Q$$ enters the magnetic field at $$XX'$$ and leaves it in $$4$$ seconds. The object enters the field in direction $$\hat{i}$$ will $$100J$$ of kinetic energy. Find the velocity of it’s entering region $$\left( 2 \right)$$, provided $${{B}_{o}}=2\pi $$ Tesla and $$Q=1C$$.<img  src="https://cmds-vedantu.s3.ap-southeast-1.amazonaws.com/prod/question-sets/e3719066-bdc8-413c-9bde-cbbf95e52cbb403309644388731258.png"/>

Accepted Answer

$$5	ext{m/s}$$

Answer

$$10	ext{m/s}$$

Answer

$$50	ext{m/s}$$

Answer

$$20	ext{m/s}$$

Question 5

A disc is rotating with angular velocity $$''W''$$ and charge $$''Q''$$ is uniformly spread  over the area. Magnetic moment of the disc is.

Accepted Answer

$$\dfrac{QW{{R}^{2}}}{4}$$

Answer

$$\dfrac{QWR}{2}$$

Answer

$$\dfrac{QW{{R}^{2}}}{2}$$

Answer

$$\dfrac{QWR}{4}$$