Physics Past Questions and Answers

In the circuit above, the ammeter reads a current of 5.0 A when R = 8Ω and reads 7.0A when R = 5Ω. The value of the unknown resistance X is

In the circuit above, The potential across each capacitor is 100V. The total energy stored in the two capacitors is

In the diagram above, if the internal resistance of the cell is zero, the ration of the powers P₁ and P₂ dissipated by R₁ and R₂

When a ship sails from salt water into fresh water, the fraction of its volume above the water surface will

When a ship sails from salt water into fresh water, the fraction of its volume above the water surface will