This exam is open book and open notes and calculators are allowed, but you may n

Question

This exam is open book and open notes and calculators are allowed, but you may not access the internet. Please no talking during the exam. Any required constants and conversions not given in the problem can be found in your textbook. Using a uniform 1000 N/C electric field in a velocity selector, what magnetic field is required to select particles going 400 m/s? a. 300 T b. 20. T c. 5.0 T d. 2.5 T e. 0.25 T A step-down transformer going from 3000 V to 200 V needs what ratio of primary to secondary coils (N_p: N_s)? a. 1: 5 b. 3: 2 c. 6: 1 d. 30: 2 e. 50: 1 How fast can the current change in a circuit with a 12 V potential difference using a 500-mH inductor? a. 0.12 A/s b. 0.24 A/s c. 24 A/s d. 48 A/s e. 500 A/s What is the inductance of a solenoid that has 200 turns/m, is 3.0 m long, and has a radius of a. .44 mH b. .34 mH c. .19 mH d. .025 mH e. .0021 mH A high-pass filter consists of a resistor and series and a capacitor in parallel to the output terminals of a circuit. It is used to a. Remove low frequency signals on a circuit b. Remove high frequency signals on a circuit c. Increase the inductance of the circuit d. Increase the resistance of the circuit e. Reduce transmission losses from high-voltage power plants

Explanation / Answer

1) v = E/B

B = 1000/400 = 2.5 T

2) np/ns = vp/vs = 3000/200

3) emf = l*di/dt

di/dt = emf/l = 24 A/s

4) L = mue*N^2A/l

here radius is not given

5)

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.