Learn more about our help with Assignments: Electric Circuits
Search & Filtering
Electric Circuits
what is physics
Electric Circuits
A fully charged defibrillator contains 1.20 kJ of energy stored in a 1.10 x10-4 F capacitor. In
a discharge through a patient, 6.00 x102 J of electrical energy is delivered in 3.50 ms. (a) Find the
voltage needed to store 1.20 kJ in the unit. (b) What average power is delivered to the patient?
a discharge through a patient, 6.00 x102 J of electrical energy is delivered in 3.50 ms. (a) Find the
voltage needed to store 1.20 kJ in the unit. (b) What average power is delivered to the patient?
Electric Circuits
A proton is released from rest at x = -2.9 cm in a constant electric field with magnitude 1.70
x104 N/C, pointing in the positive x-direction. (a) Calculate the change in the electric potential
energy associated with the proton when it reaches x = 5.9 cm. (b) An electron is now fired in the
same direction from the same position. What is the change in electric potential energy associated
with the electron if it reaches x = 18.0 cm? (c) If the direction of the electric field is reversed and
an electron is released from rest at x = 4.00 cm, by how much has the electric potential energy
changed when the electron reaches x= 9.00 cm?
x104 N/C, pointing in the positive x-direction. (a) Calculate the change in the electric potential
energy associated with the proton when it reaches x = 5.9 cm. (b) An electron is now fired in the
same direction from the same position. What is the change in electric potential energy associated
with the electron if it reaches x = 18.0 cm? (c) If the direction of the electric field is reversed and
an electron is released from rest at x = 4.00 cm, by how much has the electric potential energy
changed when the electron reaches x= 9.00 cm?
Electric Circuits
A spherical conducting shell of inner radius a and outer radius b carries a total charge +Q
distributed on the surface of a conducting shell as in figure. The quantity Q is taken to be positive.
(a) Find the electric field in the interior of the conducting shell, for r <a, and (b) the electric field
outside the shell, for r >b. (c) If an additional charge of -2Q is placed at the center, find the electric
field for r . b.
(d) What is the distribution of charge on the sphere in part (c)?
distributed on the surface of a conducting shell as in figure. The quantity Q is taken to be positive.
(a) Find the electric field in the interior of the conducting shell, for r <a, and (b) the electric field
outside the shell, for r >b. (c) If an additional charge of -2Q is placed at the center, find the electric
field for r . b.
(d) What is the distribution of charge on the sphere in part (c)?
Electric Circuits
A parallel-plate capacitor has an area A = 3.00 cm2
and a plate separation d =1 mm. (a) Find
its capacitance. (b) How much charge is on the positive plate if the capacitor is connected to a
6.00-V battery? Calculate (c) the charge density on the positive plate, assuming the density is
uniform, and (d) the magnitude of the electric field between the plates
and a plate separation d =1 mm. (a) Find
its capacitance. (b) How much charge is on the positive plate if the capacitor is connected to a
6.00-V battery? Calculate (c) the charge density on the positive plate, assuming the density is
uniform, and (d) the magnitude of the electric field between the plates
Electric Circuits
Three charges lie along the x-axis as in the Figure. The positive charge q1 = 16 µC is at x= 2.0
m, and the positive charge q2 =8.0 µC is at the origin. Where must a negative charge q3 be placed
on the x-axis so that the resultant electric force on it is zero?
m, and the positive charge q2 =8.0 µC is at the origin. Where must a negative charge q3 be placed
on the x-axis so that the resultant electric force on it is zero?
Electric Circuits
An electric kettle (650w), refrigerator (1.5w),a television (79w)and 10 lamps(40w) each and electric iron(100w) are connected in series in a house. How much will cost the housekeeper to switch on all the appliances for 24 hours if the cost of electricity from PHCN is 18 kobo per kwh?
Electric Circuits
The lights in a theatre have to be capable of being damaged or totally switched off, which two components could be used to do this?
Electric Circuits
In an attempt to determine the effect of a stove, Pelle heated 0.8 liters of water in a saucepan. To raise the pot temperature by 1 K, the energy 50 J needs to be supplied.
The saucepan was then placed on a stove plate which was screwed up to full power.
He measured the temperature as a function of time and got the following results - see diagram below.
a) Explain the appearance of the diagram
b) Use measurement data and your formula collection to determine the effect of the cooker plate
c) Describe the simplifications you have made
The saucepan was then placed on a stove plate which was screwed up to full power.
He measured the temperature as a function of time and got the following results - see diagram below.
a) Explain the appearance of the diagram
b) Use measurement data and your formula collection to determine the effect of the cooker plate
c) Describe the simplifications you have made
Electric Circuits
Suppose you have to connect a battery and four equal light bulbs, A, B, C and D.
Lamp A and B should shine just as brightly, C should shine brighter, and D should shine most brightly. Draw a wiring diagram and motivate your choice
Lamp A and B should shine just as brightly, C should shine brighter, and D should shine most brightly. Draw a wiring diagram and motivate your choice
