AIEEE 2006 | Magnetic Effect of Current Question 205 | Physics

A long solenoid has $$200$$ turns per $$cm$$ and carries a current $$i.$$ The magnetic field at its center is $$6.28 \times {10^{ - 2}}\,\,\,Weber/{m^2}.$$ Another long solenoid has $$100$$ turns per $$cm$$ and it carries a current $${i \over 3}$$. The value of the magnetic field at its center is

$$1.05 \times {10^{ - 2}}\,\,Weber/{m^2}$$

$$1.05 \times {10^{ - 5}}\,\,Weber/{m^2}$$

$$1.05 \times {10^{ - 3}}\,\,Weber/{m^2}$$

$$1.05 \times {10^{ - 4}}\,\,Weber/{m^2}$$

AIEEE 2006

MCQ (Single Correct Answer)

-1

In a region, steady and uniform electric and magnetic fields are present. These two fields are parallel to each other. A charged particle is released from rest in this region. The path of the particle will be a

helix

straight line

ellipse

circle

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 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

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