EASY

JEE Main/Advance

IMPORTANT

Earn 100

Figure shows an amperian path $ABCDA$ . Part $ABC$ is in vertical plane $PSTU$ while part $CDA$ is in horizontal plane $PQRS$ . Direction of circumlation along the path is shown by an arrow near point $B$ and at $D .$ $\oint \hat{B} . d \hat{l}$ for this path according to Ampere’s law will be :

50% studentsanswered this correctly

Important Questions on Magnetic Effect of Current

EASY

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Physics>Chapter 25 - Magnetic Effect of Current>Exercise - 1>Q 79

A circular loop of radius

r

carries a current

i

. How should a long, straight wire carrying a current

3 i

be placed in the plane of the circle so that the magnetic field at the centre of the loop becomes zero?

EASY

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Physics>Chapter 25 - Magnetic Effect of Current>Exercise - 1>Q 80

A long solenoid is fabricated by closely winding a wire of diameter

0.5 mm

over a cylindrical nonmagnetic frame so that the successive turns nearly touch each other. What would be the magnetic field

B

at the centre of the solenoid if it carries a current of

2.5 A

EASY

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Physics>Chapter 25 - Magnetic Effect of Current>Exercise - 1>Q 81

A current $I$ flows along the length of an infinitely long, straight and thin-walled pipe. Then

EASY

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Physics>Chapter 25 - Magnetic Effect of Current>Exercise - 1>Q 82

A circular loop is kept in that vertical plane which contains the north-south direction. It carries a current that is towards south at the topmost point. Let

A

be a point on axis of the circle to the east of it and

B

a point on this axis to the west of it. The magnetic field due to the loop

EASY

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Physics>Chapter 25 - Magnetic Effect of Current>Exercise - 1>Q 83

A long, thick straight conductor of radius

R

carries current

I

uniformly distributed in its cross section area. The ratio of energy density of the magnetic field at distance

R / 2

from surface inside the conductor and outside the conductor is :

EASY

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Physics>Chapter 25 - Magnetic Effect of Current>Exercise - 1>Q 84

Which of the following particles will experience minimum magnetic force (magnitude) when projected with the same velocity perpendicular to a magnetic field?

EASY

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Physics>Chapter 25 - Magnetic Effect of Current>Exercise - 1>Q 85

Electric current

i

enters and leaves a square loop made of homogeneous wire of uniform cross-section through diagonally opposite corners. A charge particle

q

moving along the axis of the square loop passes through centre at speed

υ

. The magnetic force acting on the particle when it passes through the centre has a magnitude

HARD

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Physics>Chapter 25 - Magnetic Effect of Current>Exercise - 1>Q 86

Two particles

X

and

Y

having equal charges, after being accelerated through the same potential difference enter a region of uniform magnetic field and describes circular paths of radii

r_{1}

and

r_{2}

respectively. The ratio of the mass of

X

and

Y

Figure shows an amperian path ABCDA. Part ABC is in vertical plane PSTU while part CDA is in horizontal plane PQRS. Direction of circumlation along the path is shown by an arrow near point B and atD. ∮ B^. d l^ for this path according to Ampere’s law will be :

Important Questions on Magnetic Effect of Current

Learn and Prepare for any exam you want !

Figure shows an amperian path $ABCDA$ . Part $ABC$ is in vertical plane $PSTU$ while part $CDA$ is in horizontal plane $PQRS$ . Direction of circumlation along the path is shown by an arrow near point $B$ and at $D .$ $\oint \hat{B} . d \hat{l}$ for this path according to Ampere’s law will be :