1.

Electrical field is used to deflect

Answer»

`alpha and beta` particles
`alpha and GAMMA` particles
`alpha, beta and gamma` -particles
`beta and gamma` particles

Solution :`alpha`-particles are positively CHARGED whereas `beta-`particles are negatively charged particles. Hence, these can be deflected by ELECTRIC field. HOWEVER `gamma`-particles being neutral, so they cannot be deflected by electric field


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