Question

1. what is the resistance of a circuit with three 1.5v batteries and running at a current of 5a

v=
i=
r=

1. an alarm clock draws 0.7 a of current when connected to a 120 volt circuit. calculate its resistance.

v=
i=
r=

Explanation:

Step1: Determine total voltage for first - question

Three 1.5V batteries in series, so $V = 3\times1.5=4.5$V. Using Ohm's law $R=\frac{V}{I}$, where $I = 5$A.

Step2: Calculate resistance for first - question

$R=\frac{4.5}{5}=0.9\Omega$

Step3: Determine voltage and current for second - question

$V = 120$V and $I=0.7$A. Using Ohm's law $R=\frac{V}{I}$.

Step4: Calculate resistance for second - question

$R=\frac{120}{0.7}\approx171.43\Omega$

Answer:

1. $R = 0.9\Omega$
2. $R\approx171.43\Omega$