BITSAT 2022 | Moving Charges and Magnetism Question 2 | 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 at speed v. The magnetic force on the particle when it passes through the centre has a magnitude.

$${{qv{\mu _0}I} \over {2\pi r}}$$

$$qv{{{\mu _0}I} \over {\pi r}}$$

$${{qv{\mu _0}I} \over r}$$

BITSAT 2021

MCQ (Single Correct Answer)

-1

Two particles A and B of masses m_A and m_B respectively, are having same charge and moving on same plane. A uniform magnetic field exists perpendicular to this plane. The speeds of the particles are v_A and v_B respectively and the trajectories are as shown in figure. Then,

BITSAT 2021 Physics - Moving Charges and Magnetism Question 4 English

m_A = m_B and v_A = v_B

m_Av_A > m_Bv_B

m_A < m_B and v_A < v_B

m_Av_A < m_Bv_B

BITSAT 2020

MCQ (Single Correct Answer)

-1

What is the magnitude of the force experienced per unit length by a thin wire that carries a current of I = 10 A and is formed into a semi-circle with a radius of R = 20$$\pi$$ cm at a point O?

30 $$\mu$$N/m

40 $$\mu$$N/m

50 $$\mu$$N/m

60 $$\mu$$N/m

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