A current carrying wire in the neighbourhood produces

Important Questions on Magnetic Effect of Electric Current

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IMPORTANT

Physics Crash Course MHT-CET>Chapter 16 - Magnetic Effect of Electric Current>Exercise 1>Q 87

The magnetic induction at a point $\mathrm{P}$ which is at a distance of $4 \mathrm{cm}$ from a long current carrying wire is ${10}^{-8} \mathrm{T}$. The induction at a distance $12 \mathrm{cm}$ from same current carrying wire is

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IMPORTANT

Physics Crash Course MHT-CET>Chapter 16 - Magnetic Effect of Electric Current>Exercise 1>Q 88

A vertical straight conductor carries a current vertically upwards. A point $P$ lies to the east of it at a small distance and another point $Q$ lies to the west at the same distance. The magnetic field at $P$ is

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Physics Crash Course MHT-CET>Chapter 16 - Magnetic Effect of Electric Current>Exercise 1>Q 89

A helium nucleus makes a full rotation in a circle of radius $0.8 \mathrm{m}$ in two seconds. The value of the magnetic field $B$ (in $T$) at the centre of the circle will be

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IMPORTANT

Physics Crash Course MHT-CET>Chapter 16 - Magnetic Effect of Electric Current>Exercise 1>Q 90

Two identical coils carrying equal current have a common centre but their planes are at right angles to each other. What is the ratio of the magnitudes of the resultant magnetic field and the field due to one coil alone at the centre?

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IMPORTANT

Physics Crash Course MHT-CET>Chapter 16 - Magnetic Effect of Electric Current>Exercise 1>Q 91

Two circular coils are made of two identical wires of the same length. If the number of turns of coils are $4$ and $2$ then the ratio of magnetic inductions at their centres will be

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Physics Crash Course MHT-CET>Chapter 16 - Magnetic Effect of Electric Current>Exercise 1>Q 93

The ratio of magnetic induction at a point along the axis of a circular coil of radius $a$ at a distance $x$(for $\mathrm{x}>>\mathrm{a}$) to a point where $x$ tends to zero is..

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IMPORTANT

Physics Crash Course MHT-CET>Chapter 16 - Magnetic Effect of Electric Current>Exercise 1>Q 94

A wire of length $L$ carrying a current $I$ is bent into a circle. The magnitude of the magnetic field at the centre of the circle is

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IMPORTANT

Physics Crash Course MHT-CET>Chapter 16 - Magnetic Effect of Electric Current>Exercise 1>Q 95

The electric current in a circular coil of two turns produces a magnetic induction of $0.2 \mathrm{T}$ at its centre. The coil is unwound and rewound into a circular coil of four turns. The magnetic induction at the centre of the coil now is, in Tesla, (if same current flows in the coil)