Internal Combustion Engines
In a coil ignition system of petrol engines, a condenser is connected across the contact breaker in order to

Prevent sparking across the gap between the points
Both (A) and (B)
Cause more rapid break of the primary current, giving a higher voltage in the secondary circuit
None of these

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Internal Combustion Engines
The tangential velocity of the water element having a free vortex is

Inversely proportional to its distance from the centre
Directly proportional to its distance from the centre
Inversely proportional to its (distance)2 from the centre
Directly proportional to its (distance)2 from the centre

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