1. A battery has an internal resistance of 3 ohms and an emf of 6 V. It is connected to a 5 ohm resistor. What is the power in the external resistor?

• 1.2W
• 2.8W
• 7.2W
• 20W

2. Between which two points on the circuit below is the resistance maximum?

• WX
• WY
• WZ
• XY

3. A 1000V supply with no internal resistance is connected in series with a 200 ohm resistor and a 400 ohm resistor. When a voltmeter is connected across the 200 ohm resistor, it reads 294 V. What is the resistance of the voltmeter?

• 1000Ω
• 400Ω
• 200Ω
• 100Ω