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A 40 W electric lamp draws a current of 0.33 A when operated with a potential difference of 120 V. What is the resistance of the lamp?
A proton is moving parallel to a uniform electric field. The electric field accelerates the proton and increases its linear momentum to 5.0 10-23 kg m/s
Experimentor A uses a test charge qsub0 and experimentor B uses a test charge 2qsub0 to measure an electric field produced by stationary charges.
Charge is distributed uniformally along a straight wire. the electric field 2 cm from the wire is 20N/C. The electric field 4cm from the wire.
A 5cm radius conducting sphere has a charge density of 2*10^-6C/m^2 on its surface. Its electric potetial relative to the potential far away is.
If the electric charge on the object is doubled while its mass remains the same, find the direction and magnitude of its acceleration.
Determine the field from the rod at a point P a distance y from its center perpendicular to the rod.
How does the speed of the particles as they enter the field compare to their speed as they exit the field.
How far must the point charges q1 = +7.22 µC and q2 = -22.9 µC be separated in cm for the electric potential energy of the system to be -159 J?
A solenoid that is 75 cm long produces a magnetic field of 2.1 T within its core when it carries a current of 6.8 A. How many turns of wire.
Suppose that a current-carrying ohmic metal wire has a cross-sectional area that gradually becomes smaller from one end of the wire to the other.
1) How would you arrange two flat circular coils so that their mutual inductance was a) greatest b) least (without separating them by a great distance)?
The cube is 40 cm on each edge. Four straight segments of wire - ab, bc, cd, and da - form a closed loop that carries a current I = 5 A.
Suppose a plane electromagnetic wave has a wavelength of 50 m and the electric field vibrates with an amplitude of 22 V/m.
You may not use any results for the magnetic field due to any current configuration. Be sure to explain each step in your reasoning carefully.
The drawing shows the potential at five points on a set of axes. Each of the four points is 7.0 x 10^-3 mt from the point of origin.
The plates are insulating and have uniform surface charge densities +σ and -σ. The charge on the sphere is q = 8.60 * 10-6 C.
The values of the potentials are in kV as indicated for the +5, 0, and -5 kV contours. The positions of the charges are indicated by the dots.
Two protons are moving directly towards one another. When they are very far apart, their initial speeds are 3.00 x 10^6 m/s.
Draw a few equipotential lines. Remember, these are the curves that circle the charge distribution, always perpendicular to the electric field lines.
Find the total energy by multiplying your answer from part (b) by the total volume between the plates.
A uniformly charged disk of radius 35.0 cm carries charge with a density of 7.90 x 10^-3 C/m^2. Calculate the electric field on the axis of the disk.
Calculate the magnitude of the electric field at the ball's location due to the charged wall, and state its direction relative to the coordinate axes shown.
When a shower is turned on in a closed bathroom, the splashing of the water on the bare tub can fill the room's air with negatively charged ions.
Two Large metal plates of area 1.0 m^2 face each other. They are 5.0 cm apart and have equal but opposite charges on their inner surfaces.