The force F → experienced by a particle of charge q moving with velocity v → in magnetic field B is given by F → = q v → × B → . Which pairs of vectors are always right angles to each other?

The vector F → is perpendicular to the plane of v → and B → . Hence the pairs F → and v → ; and F → and B → are always right angles to each other.

In a chamber of uniform magnetic field B → , an electron beam enters with velocity v → . Write the expression for the force experienced by the electron.

F → = − e v → × B → , because the charge on an electrons is - e .

EASY

12th CBSE

IMPORTANT

Earn 100

State Biot-Savart law and express this law in vector form.

Important Questions on Magnetic Effect of Current

MEDIUM

12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 4 - Magnetic Effect of Current>VERY SHORT ANSWER CONCEPTUAL PROBLEMS>Q 5

How will the magnetic field intensity at the centre of a circular coil carrying current change, if the current through the coil is doubled and the radius of the coil is halved?

EASY

12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 4 - Magnetic Effect of Current>VERY SHORT ANSWER CONCEPTUAL PROBLEMS>Q 6

Consider the circuit shown where $A P B$ and $A Q B$ are semicircles. What will be the magnetic field at the centre $C$ of the circular loop ?

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EASY

12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 4 - Magnetic Effect of Current>VERY SHORT ANSWER CONCEPTUAL PROBLEMS>Q 7

Figure shows a square loop made from a uniform wire. If a battery is connected between the points $A$ and $C$ , what will be the magnetic field at the centre of the square ?

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EASY

12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 4 - Magnetic Effect of Current>VERY SHORT ANSWER CONCEPTUAL PROBLEMS>Q 8

Looking at the circular coil, the current is found to be flowing in anticlockwise direction. Predict the direction of magnetic field produced at a point on the axis of the coil on the same side as the observer.

EASY

12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 4 - Magnetic Effect of Current>VERY SHORT ANSWER CONCEPTUAL PROBLEMS>Q 9

A current is set up in a long copper pipe. Is there a magnetic field (i) inside (ii) outside the pipe ?

EASY

12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 4 - Magnetic Effect of Current>VERY SHORT ANSWER CONCEPTUAL PROBLEMS>Q 10

What is the basic difference between magnetic field and electric field ?

EASY

12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 4 - Magnetic Effect of Current>VERY SHORT ANSWER CONCEPTUAL PROBLEMS>Q 11

The force

\vec{F}

experienced by a particle of charge

q

moving with velocity

\vec{v}

in magnetic field

B

is given by

\vec{F} = q (\vec{v} \times \vec{B})

. Which pairs of vectors are always right angles to each other?

EASY

12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 4 - Magnetic Effect of Current>VERY SHORT ANSWER CONCEPTUAL PROBLEMS>Q 12

In a chamber of uniform magnetic field

\vec{B}

, an electron beam enters with velocity

\vec{v}

. Write the expression for the force experienced by the electron.

State Biot-Savart law and express this law in vector form.

Important Questions on Magnetic Effect of Current

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