Question

A portable DVD player requires six 1.5-volt batteries to operate. If the resistance in the circuit is 7.2 ohms, what is the current?

Answer 1

Data:
We have six 1.5 volt batteries, soon, your tension (V)
V = 1,5 * 6 = 9 Volts
R (resistance) = 7.2 ohms
i (Current intensity) = ? (in Amps)

Solving (Ohm's First Law):

$i = \frac{V}{R}$
$i = \frac{9}{7,2}$
$\boxed{i = 1,25A}$


Answer: The current is 1.25 amps

Answer 2

Answer: The current required will be of 1.25 Ampere.

Explanation:

Voltage of one battery= 1.5 Volts

Voltage required by DVD player to operate, V = 6 × 1.5 = 9 Volts

Resistance offered by the device, R =  7.2 Ohms

V = IR (Ohm's law)

$I=\frac{V}{R}=\frac{9}{7.2}=1.25 ampere$

The current required will be of 1.25 Ampere.