Four amperes of current are measured through a 24 Ω resistor connected across a voltage source. How much voltage does the source produce?
Answer: Option C
If you wish to increase the amount of current in a resistor from 120 mA to 160 mA by changing the 24 V source, what should the new voltage setting be?
Answer: Option D
The current through a flashlight bulb is 40 mA and the total battery voltage is 4.5 V. The resistance of the bulb is approximately
Answer: Option A
You are measuring the current in a circuit that is operated on an 18 V battery. The ammeter reads 40 mA. Later you notice the current has dropped to 20 mA. How much has the voltage changed?
A resistance of 3.3 MΩ is connected across a 500 V source. The resulting current is approximately
Answer: Option B
