A charge is accelerated from rest through a potential difference V and then enters a uniform magnetic field oriented perpendicular to its path. The magnetic field deflects the particle into a circular arc of radius R. If the accelerating potential is tripled to 3V, the radius of the circular arc will now be:

New radius of the charge particle when potential is increased by 3times of initial value

Explanation:

As we know that charge particle is accelerated due to potential difference V then we have

now the speed of the charge particle is given as

now in constant magnetic field which is perpendicular to the motion of charge  we have

now we have

now we have

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now if we changed the potential to three times of initial value then we have

so we have

when cloud cover increases then the suns ray's which provides the earth with light and warmth gets covered due to the due to the suns ray's being blocked, the temperature in that region

therefore to conclude i would like to say that,

=more the cloud cover, the lesser the

happy to

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real, smaller and upside-down.   so the answer should be b.