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When a charged particle moves at right angles to a magnetic field, then which of the following quantities changes,

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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-1>Q 63
A proton, a deuteron and an α-particle are accelerated through the same potential difference, and then they enter a uniform normal magnetic field. If the radius of circular path of proton is 8 cm then the radius of circular path of deuteron will be 
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Alpha Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-1>Q 64
A proton and an α-particle enter a uniform magnetic field at right angles to it with same velocity. The time period of α particle as compared to that of proton, will be 
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Alpha Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-1>Q 65
A charged particle with charge $q$ is moving in a uniform magnetic field. If this particle makes some angle $\left(0<\theta<180^{\circ}\right)$ with the magnetic field then its path will be 
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Alpha Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-1>Q 66

If a positively charged particle is moving as shown in the figure, then it will get deflected due to magnetic field towards 

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Alpha Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-1>Q 67
Which of the following particles will experience a maximum magnetic force (magnitude) when projected with the same velocity perpendicular to a magnetic field?
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Alpha Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-1>Q 68
An electric current i enters and leaves a uniform circular wire of radius a through diametrically opposite points. A charged particle q moving along the axis of the circular wire passes through its centre at speed v. The magnetic force acting on the particle when it passes through the centre has a magnitude
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Alpha Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-1>Q 69
A charged particle is moved along a magnetic field line. The magnetic force on the particle is
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Alpha Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-1>Q 70
Two particles X and Y having equal charges, after being accelerated through the same potential difference enter a region of uniform magnetic field and describes circular paths of radii r1 and r2 respectively. The ratio of the mass of X and Y is