IB Physics. Electricity

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A tutorial sheet on the IB Physics topic B3 electricity is given below.

  1. In a wire N electrons per minute move to the right past a point every second. Find an expression for the current.
  2. The emf of a cell is E. The internal resistance of the cell is r. Find the work done by the cell in moving a charge q between its terminals.
  3. The potential difference across a resistor is V when it is connected in series to a cell of zero internal resistance. Find the potential difference across this resistor when two equal resistances which are connected in parallel are placed in series with the first resistor.

HSC Physics. Momentum and Kinetic Energy

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A tutorial sheet on momentum and kinetic energy is given below.

  1. Two moving objects collide and join together. Is the total kinetic energy conserved in this collision?
  2. A pellet of mass 100 g moves at 20 m s-1 to the east. A clay block of mass 300 g moves at 5 m s-1 to the west. A collision occurs and the objects join together. Find the kinetic energy of the combined mass after the collision.
  3. The kinetic energy of an object is K. Find the new kinetic energy of this object if its mass is doubled and its momentum is halved.
  4. A stationary nucleus has a mass M. It emits a small particle of mass m at a speed v. Find the ratio of the kinetic energy of the small particle to that of the remaining nucleus.