The wire in the figure carries a current i and consists of a circular arc of radius R and central angle π 2 rad, and two straight sections whose extensions intersect the centre C of the arc. The magnetic field B → that the current produces at C is :-

| B → | = µ 0 i 8 R into the plane of the figure

| B → | = µ 0 i 8 R out of the plane of the figure

| B → | = µ 0 i 8 π R into the plane of the figure

| B → | = µ 0 i 8 π R out of the plane of the figure

E M B I B E

Beta Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise (Analytical Questions)>Q 19

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Which of the following statement is not true; magnetic field at the centre of current carrying loop :-

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Important Questions on Magnetic Effect of Current

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Beta Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise (Analytical Questions)>Q 20

A circular coil of radius R carries an electric current. The magnetic field due the coil at a point on the axis of the coil located at a distance r from the center of the coil, such that r >> R varies as :-

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Beta Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise (Analytical Questions)>Q 21

Two concentric circular loops of radii 0.08m and 0.1 m carries current such that magnetic field at the centre is zero. If the current in the outer loop is 8A clockwise, current in the inner loop is :-

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Beta Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise (Analytical Questions)>Q 22

In the shown figure magnetic field at point A will be

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Beta Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise (Analytical Questions)>Q 23

If radius of loop becomes two times and current becomes half then magnetic field at centre of the loop will be :-

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Beta Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise (Analytical Questions)>Q 24

2 A

current is flowing in a circular loop of radius

1 m

. Magnitude of magnetic field at the centre of circular loop will be

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Beta Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise (Analytical Questions)>Q 25

A horizontal overhead powerline is at a height of

4 m

from the ground and carries a current of

100 A

from east to west. The magnetic field directly below it on the ground is

(μ_{0} = 4 π \times 10^{- 7} T m A^{- 1})

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Beta Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise (Analytical Questions)>Q 26

The wire in the figure carries a current i and consists of a circular arc of radius R and central angle $\frac{π}{2}$ rad, and two straight sections whose extensions intersect the centre C of the arc. The magnetic field $\vec{B}$ that the current produces at C is :-

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