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A battery of emf 10 V and internal resistance 3 Ω is connected to a resistor. If the current in the circuit is 0.5 A, what is the resistance of the resistor? What is the terminal voltage
The storage battery of a car has an emf of 12 V. If the internal resistance of the battery is 0.4 Ω, what is the maximum current that can be drawn from the battery?
A coffee-maker contains a heating element that has a resistance of 44 Ω. This heating element is energized by a 120-V outlet. What is the current in the heating element?
The plane of coil is rotated from a position where it makes an angle of 32.0 degrees with a magnetic field of 1.20T to a position perpendicular to the field. The rotation takes 7.00*10^-2s. What is
A small sphere of radius r1 and charge q1 is enclosed by a spherical shell of radius r2 and charge q2. Show that if q1 is positive, charge will necessarily flow from the sphere to the shell (when th
When it is connected to an ac source with an rms output of 12 V and a frequency of 60.0 Hz, the current drops to 2.0 A. a) Find the impedance of the circuit at 60.0 Hz. (don't forget about the
Describe schematically the equipotential surfaces corresponding to" (a) a constant electric field in the z-direction,
Determine the capacitance of the system and the potential of the inner cylinder. Neglect end effects (i.e., bending of field lines at the ends).
An inductor with an inductance of 2.90H and a resistor with a resistance of 6.00 Ohms are connected to the terminals of a battery with an emf of 5.00V and negligible internal resistance. A) Find th
A 10-m-by-14-m house is built on a 12-cm-thick slab of concrete. What is the rate of heat loss through the slab if the ground temperature is 5.00° C while the interior of the house is 22.0°
3.11 x 1016 electrons are passing from left to right through a wire every seconds. What is the current in that wire, in Amps? Please use a positive sign to indicate that the current is flowing to th
The surface absorbs half of the energy and reflects half. The speed of light is 2.99792 × 108 m/s. a) Calculate the total energy absorbed by the surface in 1.1 min. Answer in units of J.
What is the radius r for which the radiation force of repulsion just balances the gravitational force of attraction to the sun?
A slide projector needs to create a 98-cm-high image of a 2.0 cm slide. The screen is 300 cm from the slide. What focal length does the lens need? Assume that it is a thin lens. How far should you
A second coil with 410 turns is wound uniformly on top of the first. What is the mutual inductance of these coils?
If 3.43 moles of this gas undergoes isothermal expansion at T = 216K from a volume of 1.00 m³ to 3.00 m³, calculate the work done by the gas.
A uniform current density of 2.0 Amps/m**2 is flowing down a cylindrical region of radius 3.0 meters. a) Use Ampere's law to find the B field as a function of cylindrical radius r from the center of t
A clump of soft clay is thrown horizontally from 8.50 m above ground with a speed of of 20.00 m/s. Where is the clay after 1.50 s? Assume it sticks in place when its hits the ground?
The fifth-order maximum of the unknown wavelength exactly overlaps the third-order maximum of the red light. What is the unknown wavelength?
A gas is compressed from 600 cm3 to 200 cm3 at a constant pressure of 400 kPa. At the same time 100 J of heat energy is transferred out of the gas. What is the change in the thermal energy of the g
Water undergoes viscous flow through two pipes with the same pressure difference between the ends. Pipe 1 has three times the diameter as pipe 2.
Homework, Problem 1. Using graphing strategy plot the graph of the function f(x) =2x3 +3x2 -12x Problem 2. Problem 3. A demand function is given by Q(P) = 800-25P a) Find the el
A partially filled closed tank contains ethyl alcohol at 68 degrees F. If the air above the alcohol is evacuated, what is the minimum absolute pressure that develops in the evacuated space?