COMEDK 2022 | Moving Charges and Magnetism Question 18 | Physics

An electric current $I$ enters and leaves a uniform circular wire of radius $r$ through diametrically opposite points. A charged particle $$q$$ moves along the axis of circular wire passes through its centre with speed $$v$$. The magnetic force on the particle when it passes through the centre has a magnitude

$$\frac{q v \mu_0 I}{2 \pi r}$$

$$q v \frac{\mu_0 I}{\pi r}$$

$$\frac{q v \mu_0 I}{r}$$

$$0$$

COMEDK 2022

MCQ (Single Correct Answer)

-0

A regular hexagon of side $$m$$ which is a wire of length 24 m is coiled on that hexagon. If current in hexagon is $$I$$, then the magnetic moment,

COMEDK 2022 Physics - Moving Charges and Magnetism Question 19 English

$$6\sqrt3~Im^2$$

$$3\sqrt3~Im^2$$

$$\frac{3\sqrt3}{2}~Im^2$$

$$6~Im^2$$

COMEDK 2021

MCQ (Single Correct Answer)

-0

Two particles of masses $$m_1=m,m_2=2m$$ and charges $$q_1=q,q_2=2q$$ entered into uniform magnetic field. Find $$F_1/F_2$$ (force ratio).

$$\frac{1}{2}$$

$$1$$

$$\frac{1}{3}$$

$$2$$

COMEDK 2021

MCQ (Single Correct Answer)

-0

A long solenoid has 20 turns cm$$^{-1}$$. The current necessary to produce a magnetic field of 20 mT inside the solenoid is approximately

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