AIEEE 2005 | Magnetic Effect of Current Question 227 | Physics

A charged particle of mass $$m$$ and charge $$q$$ travels on a circular path of radius $$r$$ that is perpendicular to a magnetic field $$B.$$ The time taken by the particle to complete one revolution is

$${{2\pi {q^2}B} \over m}$$

$${{2\pi mq} \over B}$$

$${{2\pi m} \over {qB}}$$

$${{2\pi qB} \over m}$$

AIEEE 2005

MCQ (Single Correct Answer)

-1

A uniform electric field and a uniform magnetic field are acting along the same direction in a certain region. If an electron is projected along the direction of the fields with a certain velocity then

its velocity will increase

Its velocity will decrease

it will turn towards left of a direction of motion

it will turn towards right of direction of motion

AIEEE 2005

MCQ (Single Correct Answer)

-1

Two thin, long, parallel wires, separated by a distance $$'d'$$ carry a current of $$'i'$$ $$A$$ in the same direction. They will

repel each other with a force of $${\mu _0}{i^2}/\left( {2\pi d} \right)$$

attract each other with a force of $${\mu _0}{i^2}/\left( {2\pi d} \right)$$

repel each other with a force $$_0{i^2}/\left( {2\pi {d^2}} \right)$$

attract each other with a force of $${\mu _0}{i^2}/\left( {2\pi {d^2}} \right)$$

AIEEE 2004

MCQ (Single Correct Answer)

-1

The magnetic field due to a current carrying circular loop of radius $$3$$ $$cm$$ at a point on the axis at a distance of $$4$$ $$cm$$ from the centre is $$54\,\mu T.$$ What will be its value at the center of loop?

$$125\,\mu T$$

$$150\,\mu T$$

$$250\,\mu T$$

$$75\,\mu T$$

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