An electron in a cathode-ray tube is accelerated through a potential difference of 10 kV, then passes through the d = 2.4- cm-wide region of uniform magnetic field in the figure. ov X 10 kV X X d X X X

Which of the particles as shwon has the greatest mass, assuming all have identical charges and velocities?

A Ca2+ beam is bent in a circle of radius r by a uniform field B. What is the speed of the ions? reB/mca Or2eB/mca O reB/mp O r2eB/mp

The classic Millikan oil drop experiment was the first to obtain an accurate measurement of the charge on an electron. In it, oil drops were suspended against gravity by a vertical electric field. microscope Assume the oil drop to be 1.90 µm in radius and have a density of 922 kg/m3. (a) Find the weight of the drop. N (b) If the drop has a single excess electron, find the magnitude of the electric field strength needed to balance its weight. N/C

Two 4.00-cm wide charged plates oriented horizontally source a vertical, uniform 100-N/C electric field. An electron ini- tially moving at 3.00 × 106 m/s enters the region between the plates. (a) Calculate the vertical displacement the electron undergoes in passing through the plates. (b) Determine the velocity (magnitude and direction) of the electron as it exits the field. Ignore the fringing of the field. Vo

The classic Millikan oil drop experiment was the first to obtain an accurate measurement of the charge on an electron. In it, oil drops were suspended against gravity by a vertical electric field. GI Assume the oil drop to be 2.20 μm in radius and have a density of 957 kg/m³. (a) Find the weight of the drop. N + microscope (b) If the drop has a single excess electron, find the magnitude of the electric field strength needed to balance its weight. N/C

A point charge for which Q = 4.2 × 10-16 C and m = 2.5 x 10-26 kg is moving in the combined fields E = 250ax + 115ay - 230a, V/m and B = 2ax - ay - 3a, mT. If the charge velocity at t = 0 is v(0) = (2ax + 4ay +3az) × 105 m/s: %3D give the unit vector showing the direction in which the charge is accelerating at t = 0. find the kinetic energy of the charge at t = 0. Answers: a. Blank 1ax + Blank 2ay + Blank 3 az b. Blank 4 fJ

An ion enters a region of a uniform magnatic field Bout = 0.4T, with a speed v= 5*10^5 m/s. The ion makes a circular pathof radius r =9.4 mm. Then what is mass to charge ratio(m/q), (in ug/C) of the ion?