AIEEE 2005 | Magnetic Effect of Current Question 227 | Physics

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 2005

MCQ (Single Correct Answer)

-1

Two concentric coils each of radius equal to $$2$$ $$\pi $$ $$cm$$ are placed at right angles to each other. $$3$$ ampere and $$4$$ ampere are the currents flowing in each coil respectively . The magnetic induction in Weber / $${m^2}$$ at the center of the coils will be
$$\left( {\mu = 4\pi \times {{10}^{ - 7}}Wb/A.m} \right)$$

$${10^{ - 5}}$$

$$12 \times {10^{ - 5}}$$

$$7 \times {10^{ - 5}}$$

$$5 \times {10^{ - 5}}$$

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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