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Electric Circuits
Find the electric potential difference Ve required to stop an electron (called a “stopping potential”) moving with an initial speed of 2.85 x 107 m/s. Would a proton travelling at the same speed require a greater or lesser magnitude of electric potential difference? Explain.
Electric Circuits
The electric potential at x=3.00 m is 120 V, and the electric potential at x=5.00 m is 190 V. What is the x-component of the electric in this region, assuming the field is uniform?
Electric Circuits
In a certain region of space, the electric field is zero. From this fact, what can you conclude about the electric potential in this region?
Electric Circuits
Two 2.00 mC point charges are located on the x-axis. One is at x=1.00 (a) Determine the electric field on the y-axis at y=0.500 m (b) Calculate the electric force on a -3.00C charge placed on the y-axis at y=0.500 m
Electric Circuits
A coil of annealed copper wire has 820 turns, the average length of which is 9 inches. If the diameter of the wire is 32 miles, calculate the total resistance of the coil at 20°C.
Electric Circuits
a loop , A straight wire carries a 6.0A current that is directed in a positive x direction. When a uniform magnetic fileld is applied perpendicular to a 3.0 m segment of a site. the magnetic force on the segment is 0.36 N, directed in the negative y direction . what is the magnitude and direction of the magnetic field?
Electric Circuits
2. The plate of a parallel plate capacitor, 5.0 x 10 -3 m apart are maintained at a potential
difference of 5.0 x 10 4 V. calculate the magnitude of the:
(i) Electric field intensity between the plate
(ii) Force on the electron
(iii) Acceleration of the electron
(Electronic charge = -1.6 x 10 -19 C, mass of electron = 9.1 x 10 -31 kg)
difference of 5.0 x 10 4 V. calculate the magnitude of the:
(i) Electric field intensity between the plate
(ii) Force on the electron
(iii) Acceleration of the electron
(Electronic charge = -1.6 x 10 -19 C, mass of electron = 9.1 x 10 -31 kg)
Electric Circuits
A point moves along an arc of a circle of radius R. Its velocity depends on the distance covered s as v = a sqrt(s), where a is a constant. Find the angle α between the vector of the total acceleration and the vector of velocity as a function of s.
Electric Circuits
At time t=0-, the circuit is in steady state condition. At time t=0+, the switch
is open. Find the voltage vc(t). At what time, the current through the capacitor will be
zero? What is the maximum voltage across the capacitor?
is open. Find the voltage vc(t). At what time, the current through the capacitor will be
zero? What is the maximum voltage across the capacitor?
Electric Circuits
A wire of diameter d, length l and resistivity ρ forms a circular loop. A current enters
and leaves the loop at points P and Q as shown in the Figure. Show that the resistance R of
the wire is given by the expression (4)
R =
4ρx(l − x)
πd2l
and leaves the loop at points P and Q as shown in the Figure. Show that the resistance R of
the wire is given by the expression (4)
R =
4ρx(l − x)
πd2l
