What is heaters resistance-what current does heater carry

Assignment Help Physics

Reference no: EM13667812

A 100-W heater is designed to operate by an applied voltage of 120V.

1) What is the heater's resistance, and what current does the heater carry?

2) Show that if the potential difference V across the heater changes with a small amount ΔV, the power P changes by a small amount ΔP, where ΔP/P = 2ΔV/V. (Hint: Approximate the changes with modelling them as differentials, and suppose the resistance is constant.

3) Using the part b result, discover the approximate power delivered to the heater if the potential dissimilarity is decreased to 115V.Compare your result to the exact answer.

Reference no: EM13667812

Questions Cloud

Conducting bar moves to the right at a constant speed : There is a 6Ωelectric heater that consumes 15 W of power. The conducting bar moves to the right at a constant speed, the field strength is 2.4T, and the length of the bar among the rails is 1.2m.

What is the value of impulse : A truck of 2500kg travels at 40m/s it crashes against a wall and stops at 0.2s, what is the value of impulse?, find the average force on the truck along the impact.

Three point charges are placed on the x-axis : Three point charges are placed on the x-axis. The first charge is +2.0nC at the origin, the second -2.0nC to the right at x= 50 cm, and the third is +4.0nC at the 100 cm mark. What are the magnitude and direction of the electrostatic force which acti..

Compare this to gravitational force among these particles : Two resistors by values of 27Ω and 19Ω,respectively, are connected in series and hooked to a 12Vbattery. How much current is in the circuit? How much power is expended in the circuit?

What is heaters resistance-what current does heater carry : A 100-W heater is designed to operate by an applied voltage of 120V. What is the heater's resistance, and what current does the heater carry?

Which could potentially reason you the greater injury : Which could potentially reason you the greater injury; being tackled by a light-weight, fast-moving football player, or being tackled by a player with double the mass however moving at half the speed?

Rocket in gravity- free outer space has the same thrust : If a rocket in gravity- free outer space has the same thrust at all times, is its acceleration constant, increasing or decreasing? If the rocket has the same acceleration at all times, is the thrust constant, increasing or decreasing?

Index of refraction of water and the speed of light in water : Which quantity is equivalent to the product of the absolute index of refraction of water and the speed of light in water?

What is the focal length of the magnifying glasses : An object has an angular size of 0.0150 rad when placed at the near point (21.0 cm) of an eye. When the eye views this object using a magnifying glass, the largest possible angular size of the image is 0.0380 rad. What is the focal length of the magn..

User Account

All Pages