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1. Across what potential difference does an electron have to be accelerated in order to reach the speed v = 9e7 m/s?
Non-relativistically V
Relativistically V
When should you use relativistic calculations?
2. An electron entering Thomson's e/m apparatus (Figure 3.2 and 3.3) has an initial velocity (in horizontal direction only) of 0.7 107 m/s. Lying around the lab is a permanent horseshoe magnet of strength 1.3 10-2 T, which you would like to use.
(a) What electric field will you need in order to produce zero deflection of the electrons as they travel through the apparatus? V/m
(b) When the magnetic field is turned off, but the same electric field remains, how large a deflection will occur if the region of nonzero E and B fields is 2 cm long?cm
Figure 3.2
Figure 3.3
3. A photon of wavelength 2.2 nm Compton scatters from an electron at an angle of 90°. What is the modified wavelength? (Enter your answer correct to 5 significant figures.)nmWhat is the percentage change, / ?%
4. A photon having 27 keV scatters from a free electron at rest. What is the maximum energy that the electron can obtain?keV
How much resistance is required to limit the current to 1.5 mA, if a 6v battery is connected across the resistance
A linear time-invariant continuous-time system responds to the following inputs with the corresponding outputs:Ifx(t) = u(t), then y(t) = 2(1- e^-t)u(t) and if x(t) = cost,then y(t) = 1.414 cos(t - pi/4).
Plot the current-voltage relationship for a four band resistor with the colour code gray, red, red, gold.
Calculate the probability of drawing 3 10 k resistors from a box of 500 resistors, where 495 are 100 k resistors and 5 are 10 k . Use your results from part (a) and (e) to find this probability. How many ways are there to draw 3 resistors from a bo..
1) For a semiconductor E vs kx near the band edge Ec is given by E=Ec +(h2/16m0)*kx2 Determine the effective mass of electrons in the conduction band. Here m0 is the mass of a free electron. 2) E vs. kx for electrons near the valence band edge Ev can..
Sketch the unit step response of the system below. Show the magnitude of the steady state on the c(t) axis of your response curve and the value of the time constant on the t axis. T(s)=C(s)/R(s)=5/s+2.5
I started writing a program and need help. I need to be able to enter up to 15 numbers and output the minimum number, maximum number and the geometric mean.
The lifetime of a turtle is a continuous value uniformly distributed between 50 and 150 years. Let X and Y be the lifetimes of two randomly chosen turtles, and consider the following events: A = {X
A certain power amplifier with crossover distortion has the input/output voltage relationship vo (t) = vi (t)3 (2.39) a) Use example voltage values to show that this does not satisfy the relationship. b) Let vi (t) = sin (pi t) .
In a voltage stabilizer circuit with a Zener diode, the output voltage decreases when touching the zener diode with your fingers when no load is connected. Ideally, the output voltage should not drop. Explain why there is a decrease in output volt..
A spaceship moves at a speed of 0.85 c away from theEarth. It shoots a star wars torpedo toward the Earth at aspeed of 0.80 c relative to the ship. What is the velocity of the torpedo relative to the Earth
Use a K-Map to design a circuit that has two operations. In mode 1, it outputs the value of the 3-bit input multiplied by 3. In mode 2, it outputs the number of 1's in the 3-bit input. Design a circuit that implements this function.
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