Questions and answers for the 20xx emte examination (modified)

[in body] 11 questions and answers for electric electronics 1 questions, single selection questions: in the following questions, the only correct answer code is entered in brackets in the chart circuit, the us = 2 v, is = 2 a. The voltage between points a and b is (). (a) 3 v(b) 1 v(c) 2 v1 question 2 in the iconic circuits, us, is is a positive value and the working state is (). (a) the power of the electro-voltage source; (b) the power of the current source; (c) the main point of the two polar tubes of the voltage source and the source of the current shall not produce the semi-transmitting power; (a) the rate of rotation of electrical currents by (b) single-direction electricals; (c) the rate of conversion of electric voltages to the magnetic field by the rotation is the level of the level of p and power frequency f. (a) n fp160 (b) n fp1 602 (c) n pf160 if one point of the electrical circuit is changed to a point of reference for -2v, each point of the converted circuit is compared to the original level (). (a) higher (b) lower (c) can't determine the electric dynamics of a three-phase power source for e ta  20 314 16s in () v, eb = 20 sin (314 t - 104), e tc v  20 3 1 1 3 6s in () when t = 13 s. (a) 20 v(b) 202 v(c) 0 or a triangular connection of the pure electric loads of the three symmetrical power sources are known to be compatible with xc = 6 , while the wire current is 10 a, the third is seen in power (). (a) in 1,800 va (b) 600 va (c) 600 w graphics, r = xl = xc = 1 zirconium, the reading of the voltage table is (). (a) 0 (b) 1 (c) 2 u is s+baiu ss.. 1 + zja bcu r. Cc li. X+-2 0j jlcr rv vx x+-. Question 9 of 228 means that rxl10, uuab bc, and uuab  are the same as i, the z is rejected (). (a) (5 5j  (b) 5j  (c) 10452 as illustrated by the chart, write out a single formula for the resolution of the failure to know the electricity flows of the secondary roads. Three, to ask for the currents of the electricity that flowed in the midst of the two resistances, using the judgment of davidnan. As shown in the chart, u = 220√2 sin314t vr=, l = z for testing the circuit, resistance to horns, current i, power p. V. How low is the power of the electrical barrier to connect with the y-shaped furnace when using three electric furnaces? (2) when the wire pressure is 220v, the heat is increased by a three-phase electrical barrier furnace. (3) how low is the power of a three-phase electrical barrier, each electrical barrier? (6) the electrical circuit is shown by the chart, the ucc=12v, rb=120 k, rl=15k, the transistor 401 ; 表c1 ? 2 ? 2 ? 1 ? 1 ? 2 ; ? 1 ? 1 ? 1 ? 1 ? 1 ; ? 1 ? 1 ? 1 ; ? 1 ? 1 ? 2 ? 2 ; ? 1 ? 1 =1 ? 2 & & =1 表1 ; ? 1 ? 1 ? 1 ; ? 1 =1 ? 1 & ? 1 ? 1 =2 ; ? 1 & & & & & = & & & = & & & err er er er 1 214 36352. ... +-+--re 4+3a1 2 times 6v.+++r lr br e u ccu ic 1 c2u +-+-+-lriu+-3 vii (this broad question 5 minutes) what are the errors in the trial chart? Viii, (10 cents of this big question) as in the chart, the truncable range of power delivery u0, n n n= 1 440 r/ min. Purpose: (1) the power factor under the rated work pattern shall be the same as the value rectangular; (2) if the engine starts and turns the rectangles shall be equal to the amount of the rectangular rectangular, the starting and transceiving rectangular shall be used to take down the pressure during the exercise. X. (this question 5 minutes) the connection of d and jk triggers to the circuits is shown below, if the initial state of each trigger is zero。draws the wave shape of the q1, q2 end of the cp pulse, d1 q1 q1 cpp "1" j2k2 q2 q2 cc cp