Multiple Choice
Power: The heater element of a particular 120-V toaster is a 8.9-m length of nichrome wire, whose diameter is 0.86 mm. The resistivity of nichrome at the operating temperature of the toaster is 1.3 × 10-6 Ω ∙ m. If the toaster is operated at a voltage of 120 V, how much power does it draw?
A) 720 W
B) 700 W
C) 750 W
D) 770 W
E) 800 W
Correct Answer:

Verified
Correct Answer:
Verified
Q8: Ohm's law: How much current will be
Q9: Drift velocity: A silver wire has a
Q10: Ohm's law: A cylindrical wire of radius
Q11: Resistivity: What must be the diameter of
Q12: Drift velocity: The diameter of a copper
Q14: Power: A 1500-W heater is connected to
Q15: Current: The current supplied by a battery
Q16: Internal battery resistance: In the figure, when
Q17: Ohm's law: Calculate the current through a
Q18: Ohm's law: When a potential difference of