Consider the following circuit

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The equivalent resistance of the circuit will be

A racing car accelerates on a straight line from rest to a speed of 50 m/s in 25 s. Assuming uniform acceleration of the throughout, the distance covered in this will be

A man weighing 70 kg is coming down in lift. If the cable of the lift brakes sudden, the weight of the man would become

A given conductor carrying a current of 1 ampere. It produces an amount of heat equal to 2000 J. If the current through the conductor is doubled, then the amount of heat produced will be