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Figure shows tracks of three charged particles in a uniform electrostatic field. Give the signs of the three charges. Which particle has the highest charge to mass ratio?

Q 1.14: Figure  shows tracks of three charged particles in a uniform electrostatic field. Give the signs of the three charges. Which particle has the highest charge to mass ratio?

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Charges 1 and 2 are repelled by the negatively charged plate of the system 

Hence 1 and 2 are negatively charged.

Similarly, 3 being repelled by positive plate is positively charged.

(Charge to mass ratio: Charge per unit mass)

Since, 3 is deflected the most, it has the highest charge to mass ratio.

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