Physics
When a bar magnet is cut into two equal halves, the pole strength of each piece –

Becomes zero
Becomes double
Becomes half
Remains the same

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Physics
Lightning is produced when

Similar charges of electricity rush towards each other and then get repelled
Water vapour produces electricity in the clouds
Clouds strike against impurities in air and the friction burns up these impurities
Strong opposite charges in different clouds break down the resistance offered by the intervening air

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