Question

In Connect, the standard answer tolerance for numeric questions is 2%. To satisfy this 2% tolerance, you should use at least three significant digits when entering your answers into Connect. It is also important never to truncate or to round intermediate steps, variables, and symbols (like TT) unless otherwise specified in the problemi statement. Please consider this rule in the following situation: According to the Ohm's law, the potential difference across the conductor (AV) is equivalent to the product of the current through the conductor and the total resistance of the conductor. Therefore, current can be expressed as voltage (potential difference) divided by resistance (- AV/R). Based on this equation, a student is asked to find the current through a conductor if the voltage equals 155 V and the resistance is 69 Ohms. The student calculates the answer to this problem to 9 digits to be 2.24637681 A.

What is the current to three significant digits:

Answer 1

The current through a conductor with a voltage of 155 V and resistance of 69 Ohms, calculated using Ohm's law to three significant digits, is 2.25 A.

Step-by-step explanation:

Using Ohm's law, which states that the current I is equal to the voltage V divided by the resistance R (I = V/R), we can calculate the current through a conductor when the voltage is 155 V and the resistance is 69 Ohms. Performing the calculation, we find that I = 155V / 69Ω = 2.24637681 A. When expressing this value to three significant digits, as required by the standard answer tolerance for numeric questions, the current to three significant digits is 2.25 A.