Title: Sähköoppi
Course: Physical and chemical phenomena and their application

Q: The electric sauna heater operates at a voltage of 230 V, and a current of 30 A flows through the heater's resistors. What is the resistance of the heater's resistor unit? Provide the answer to one decimal place, including the unit.
A: 7.7 / 7.6

Q: A simple circuit consists of a battery, a 10-ohm resistor, and an ammeter showing 0,15 A. What is the voltage of the battery?

Provide the answer to one decimal place, including the unit.
A: 1.5

Q: The current of the microwave oven is 5,4 A and the resistance is 42,5 Ω. What is the voltage required by the microwave oven? Give the answer to one decimal place. Indicate the unit as well.
A: 229.5

Q: How large is the electric current required by a laptop when its operating voltage is 20 V and its resistance is 8.9 Ω? Provide the answer to one decimal place, including the unit.
A: 2.2

Q: What is the resistance of the refrigerator when its operating current is 0,70 A? Give the answer to the nearest tenth. Indicate the unit as well.
A: 330 / 329
Feedback ("329"): Kymmenien tarkkuudella vastaus olisi 330, mutta tämäkin vastaus hyväksytään.

Q: A phone charger charges a phone with a voltage of 5 V and a current of 2 A. What is the power of the charger? Give the answer as a whole number. Indicate the unit as well.
A: 10

Q: What is the power of the washing machine when the electric current it uses is 4.6 A? Provide the answer as a whole number, including the unit.
A: 1058

Q: What is the power of the lamp connected to the circuit when a 4,5 V battery supplies a current of 50 mA to the circuit? Give the answer as a whole number. Indicate the unit as well.
A: 225