4. A sub-woofer needs a household voltage of 110 V to push
a current of 5.5 A through its coil. What is the resistance
of the sub-woofer?
5. An electric heater has a coiled metal wire which draws a
current of 100 A. The resistance of the wire is 1.1 ohms.
Calculate the voltage that must be established to it.
a current of 5.5 A through its coil. What is the resistance
of the sub-woofer?
5. An electric heater has a coiled metal wire which draws a
current of 100 A. The resistance of the wire is 1.1 ohms.
Calculate the voltage that must be established to it.
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Answer:
4. 20 ohms is the resistance f the sub-woofer
R = V / I
= 110V / 5.5A
= 20 ohms
4. 110 V must be established
V = I×R
= 100A×1.1 ohms
= 110V