An electron moving with velocity v → = i ^ v x enters a uniform magnetic field B → = k ^ B z . The electron experiences

a force but its kinetic energy does not change.

a force and its kinetic energy decreases.

a force and its kinetic energy increases.

no force hence kinetic energy does not change.

E M B I B E

Physics Crash Course JEE Main>Chapter 15 - Magnetic Effects of Current and Magnetism>Level 1>Q 28

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IMPORTANT

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In a cyclotron a charged particle

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Important Questions on Magnetic Effects of Current and Magnetism

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Physics Crash Course JEE Main>Chapter 15 - Magnetic Effects of Current and Magnetism>Level 1>Q 29

In a cyclotron, the resonance condition is

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Physics Crash Course JEE Main>Chapter 15 - Magnetic Effects of Current and Magnetism>Level 1>Q 30

A current-carrying wire is placed along east-west in a magnetic field directed northwards. If the current in the wire is directed eastwards, what will be the direction of force on the wire?

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Physics Crash Course JEE Main>Chapter 15 - Magnetic Effects of Current and Magnetism>Level 1>Q 31

What is the force acting on a $I A$ current-carrying circular loop of radius $R$ kept in a uniform magnetic field $B$ which is applied perpendicular to the loop?

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Physics Crash Course JEE Main>Chapter 15 - Magnetic Effects of Current and Magnetism>Level 1>Q 32

A conductor of length

1 m

and carrying current of

1 A

is placed at an angle

45 °

to the magnetic field of

1 oersted

. The force acting on conductor is,

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Physics Crash Course JEE Main>Chapter 15 - Magnetic Effects of Current and Magnetism>Level 1>Q 33

Two long straight conductors of length

1 m

each separated by a distance of half metre and carrying currents of

200 A

and

50 A

, respectively in opposite directions. Then the magnetic force between them is

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Physics Crash Course JEE Main>Chapter 15 - Magnetic Effects of Current and Magnetism>Level 1>Q 34

Two long wires each carrying a $DC$ current in the same direction are placed close to each other. Which one of the following statements is correct?

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Physics Crash Course JEE Main>Chapter 15 - Magnetic Effects of Current and Magnetism>Level 1>Q 35

A square loop, carrying a steady current $I$ is placed in horizontal plane near a long straight conductor carrying a steady current $I_{1}$ at a distance of $d$ from the conductor as shown in figure. The loop will experience

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