Or
Option 2
Or
Option 3
Or
Option 4
8.1.1

The rate at which (electrical) energy is converted (to other forms) (in a circuit). Or The rate at which energy is used/energy used per second. Or The rate at which work is done. Tip: the amount of work done or energy transferred per unit of time has to be clear. 
2 marks (1 x 2 marks) 
8.1.2

Option 1
Tips:
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3 marks (3 x 1 mark) 
8.1.3

How to approach this question:
Option 1 Part 1:
Or
Part 2:
Or
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5 marks (5 x 1 mark) 
8.1.4

Option 1
Or Option 2
For the parallel portion:
Or Option 3
Tip: the potential difference across the parallel components can be determined by subtracting the product of the current and the sum of the resistance of A as well as the internal resistance from the emf. 
3 marks (3 x 1 mark) 
8.1.5

Option 1
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3 marks (3 x 1 mark) 
8.2.1

The total current passes through resistor A. For the parallel portion, the current branches, therefore, only a portion of the total current passes through resistor C. 
2 marks (2 x 1 mark) 
8.2.2

The current in B is equal to the current in A. The circuit becomes a series circuit. Tips:

2 marks (2 x 1 mark) 
Or
Option 2
Or
Option 3
Or
Option 4