33 HMK #8 Chp 31

# 33 HMK #8 Chp 31 - A LTERNATING C URRENT Problems 1 3 4 5...

This preview shows pages 1–2. Sign up to view the full content.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: A LTERNATING C URRENT Problems 1, 3, 4, 5, 11, 18, 27, 34, 39, 42, 55. 31.1. IDENTIFY: The maximum current is the current amplitude, and it must not ever exceed 1.50 A. SET UP: I rms = I / 2 . I is the current amplitude, the maximum value of the current. EXECUTE: I = 1 . 50A gives I rms = 1 . 50 A 2 = 1 . 06 A . EVALUATE: The current amplitude is larger than the root-mean-square current. 31.3. IDENTIFY and SET UP: Apply Eq.(31.5). EXECUTE: (a) (b) Since the voltage is sinusoidal, the average is zero. EVALUATE: The voltage amplitude is larger than 31.4. IDENTIFY: We want the phase angle for the source voltage relative to the current, and we want the capacitance if we know the current amplitude. SET UP: X C = V I and 1 2 C X fC π = . EXECUTE: (a) o 90 φ = − . The source voltage lags the current by 90°. (b) 60.0 V 11.3 5.30 A C V X I = = = Ω . Solving 1 2 C X fC π = for C gives 4 1 1 1.76 10 F 2 2 (80.0 Hz)(11.3 ) C C fX π π − = = = × Ω ....
View Full Document

## This note was uploaded on 12/18/2011 for the course PHYS 2B 2b taught by Professor Hirsch during the Spring '10 term at UCSD.

### Page1 / 3

33 HMK #8 Chp 31 - A LTERNATING C URRENT Problems 1 3 4 5...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online