Ohms Law - Study Mode
[#1] How much current is produced by a voltage of 18 kV across a 15 kΩ resistance?
Correct Answer
(A) 1.2 A
Explanation
Solution: Ohm's Law helps us understand the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit. The formula is: V = I x R We can rearrange this formula to find the current (I): I = V / R In this question, we are given: Voltage (V) = 18 kV = 18,000 V (Remember to convert kilovolts to volts!) Resistance (R) = 15 kΩ = 15,000 Ω (Convert kiloohms to ohms!) Now, let's plug these values into the formula: I = 18,000 V / 15,000 Ω I = 1.2 A Therefore, the current produced is 1.2 Amperes. The correct answer is A.
[#2] What is the approximate filament resistance of a light bulb if it operates from a 110 V source and 0.6 A of current is flowing?
Correct Answer
(A) 183 Ω
Explanation
Solution: This question is about Ohm's Law , which is a fundamental rule in electrical circuits. Ohm's Law tells us how Voltage (V) , Current (I) , and Resistance (R) are related. The formula for Ohm's Law is: V = I * R Where: * V is the Voltage (measured in Volts) * I is the Current (measured in Amperes or Amps) * R is the Resistance (measured in Ohms) In our question, we know: * The Voltage (V) is 110 V * The Current (I) is 0.6 A We need to find the Resistance (R). To find R, we can rearrange the formula: R = V / I Now, let's plug in the values: R = 110 V / 0.6 A R ≈ 183.33 Ω So, the closest answer from the options is 183 Ω . That means Option A is correct.
[#3] Four amperes of current are measured through a 24 Ω resistor connected across a voltage source. How much voltage does the source produce?
Correct Answer
(C) 96 V
[#4] The ampere is the unit of resistance.
Correct Answer
(B) False
[#5] 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?
Correct Answer
(D) 32 V