11.1 The circuit below is used to determine the resistance of resistor X.
The 12 V battery has negligible internal resistance. When switch S is closed,
the reading on the ammeter is 0,5 A.
11.1.1 State Ohm’s law in words. (2)
11.1.2 Calculate the resistance of resistor X. (5)
11.2 Study the circuit below. The battery has an emf of 12 V with negligible internal
resistance.
Switch S is closed.
11.2.1 Write down the potential difference across the 4 Ω resistor. (1)
11.2.2 Calculate the reading on the ammeter. (5)
11.2.3 Calculate the energy dissipated in the 12 Ω resistor in 2 minutes. (5)
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TOTAL: 150