EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 23 - Magnetic Effect of Current>KCET (UG) 2021>Q 16

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A toroid with thick windings of $N$ turns has inner and outer radii $R_{1}$ and $R_{2}$ respectively. If it carries certain steady current $I,$ the variation of the magnetic field due to the toroid with radial distance is correctly graphed in

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Important Questions on Magnetic Effect of Current

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 23 - Magnetic Effect of Current>KCET (UG) 2019>Q 17

A toroid has

500

turns per unit length. If it carries a current of

2 A

, the magnetic energy density inside the toroid is

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 23 - Magnetic Effect of Current>KCET (UG) 2020>Q 18

The ratio of the magnetic field at the centre of a current-carrying circular coil to magnetic moment is $x$ . If the current and the radius both are doubled. The new ratio will become

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 23 - Magnetic Effect of Current>KCET (UG) 2020>Q 19

In a permanent magnet at room temperature

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 23 - Magnetic Effect of Current>KCET (UG) 2019>Q 21

A magnetic needle has a magnetic moment of

5 \times 10^{- 2} {Am}^{2}

and moment of inertia

8 \times 10^{- 6} {kgm}^{2}

. It has a period of oscillation of

2 s

in a magnetic field

\vec{B}

. The magnitude of magnetic field is approximately;

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 23 - Magnetic Effect of Current>KCET (UG) 2019>Q 22

The number of turns in a coil of Galvanometer is tripled, then