A conductor (shown in the figure) carrying contant current I is kept in the x - y plane in a uniform magnetic field B → . IF F is the magnitude of the total magnetic force acting on the conductor, then the incorrect statement is:

If B → is along z ^ , F ∝ L + R

If B → is along y ^ , F ∝ L + R

Two coaxial solenoids of different radii carry current I in the same direction. Let F 1 → be the magnetic force on the inner solenoid due to the outer one and F 2 → be the magnetic force on the outer solenoid due to the inner one. Then:

F 1 → is radially outwards and F 2 → = 0

F 1 → is radially inwards and F 2 → is radially outwards

F 1 → is radially inwards and F 2 → = 0

E M B I B E

Alpha Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-4>Q 24

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An electron travelling with a speed $u$ along the positive $x$ -axis enters into a region of magnetic field where $B = - B_{0} \hat{k} (x > 0)$ . It comes out of the region with speed $v$ then -

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Important Questions on Magnetic Effect of Current

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Alpha Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-4>Q 25

Which of the following statement is correct in the given figure.

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Alpha Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-4>Q 26

A magnetic field $\vec{B} = B_{0} \hat{j}$ exists in the region $a < x < 2 a$ and $\vec{B} = - B_{0} \hat{j},$ in the region $2 a < x < 3 a,$ where $B_{0}$ is a positive constant. A positive point charge moving with a velocity $\vec{V} = v_{0} \hat{i},$ where $v_{0}$ is a positive constant, enters the magnetic field at $x = a .$ The trajectory of the charge in this region can be like.

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Alpha Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-4>Q 27

A particle of mass m and positive-charge

Q,

moving with a constant velocity

{\vec{u}}_{1} = 4 \hat{i} {ms}^{- 1},

enters a region of uniform static magnetic field normal to the

x - y

plane. The region of the magnetic field extends from

x = 0

to

x = L

for all values of

y .

After passing through this region, the particle emerges on the other side after

10

milliseconds with a velocity

{\vec{u}}_{2} = (2 \sqrt{3} \hat{i} + \hat{j}) {ms}^{- 1},

The correct statements are

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Alpha Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-4>Q 28

A conductor (shown in the figure) carrying contant current $I$ is kept in the $x - y$ plane in a uniform magnetic field $\vec{B} .$ IF $F$ is the magnitude of the total magnetic force acting on the conductor, then the incorrect statement is:

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