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You Are On Multi Choice Question Bank SET 1004

50201. When a 12 V input pulse with a width equal to one time constant is applied to an RC integrator, the capacitor charges to





50202. Cotton seed track ghee is low in





50203. Interspecies adulteration of milk is detected by





50204. Salt content of casein micelle of bovine milk





50205. Hardness of water is expressed as ppm of-----------------





50206. Essential fatty acid present in milk fat





50207. The primary winding of a transformer has 110 V ac across it. What is the secondary voltage if the turns ratio is 8?





50208. To step 110 V ac down to 20 V ac, the turns ratio must be





50209. The mutual inductance when k = 0.65, L1 = 2 H, and L2 = 5 H is





50210. If 25 W of power are applied to the primary of an ideal transformer with a turns ratio of 10, the power delivered to the secondary load is





50211. A transformer with a 110 V primary has a 15:1 turns ratio. The load resistance, RL, is 120 . What is the approximate voltage across the load?





50212. How many primary volts must be applied to a transformer with a turns ratio of 0.1 to obtain a secondary voltage of 9 V?





50213. In a certain loaded transformer, the secondary voltage is one-fourth the primary voltage. The secondary current is





50214. A certain transformer has a turns ratio of 1 and a 0.85 coefficient of coupling. When 2 V ac is applied to the primary, the secondary voltage is





50215. The primary coil of a transformer is connected to a 60 V ac source. The secondary coil is connected to a 330 load. The turns ratio is 3:1. What is the secondary voltage?





50216. The primary winding of a power transformer should always be





50217. A certain amplifier has 600 internal resistance looking from its output. In order to provide maximum power to a 4 speaker, what turns ratio must be used in the coupling transformer?





50218. A transformer





50219. The primary of a transformer is connected to a 6 V battery. The turns ratio is 1:3 and the secondary load, RL, is 100 . The voltage across the load is





50220. To step 120 V ac up to 900 V ac, the turns ratio must be





50221. When a 200 load resistor is connected across the secondary winding of a transformer with a turns ratio of 4, the source "sees" a reflective load of





50222. In a certain transformer, the input power to the primary is 120 W. If 8.5 W are lost to the winding resistance, what is the output power to the load, neglecting any other issues?





50223. When a 6 V battery is connected across the primary of a transformer with a turns ratio of 8, the secondary voltage is





50224. What is the coefficient of coupling for a transformer in which 4% of the total flux generated in the primary does not pass through the secondary?





50225. A transformer has a 1:6 turns ratio and a secondary coil load resistance of 470 . The load resistance as seen by the source is





50226. If the voltage is stepped up, the current is stepped down, and vice versa.



50227. A step-down transformer has a turns ratio less than 1.



50228. A transformer responds only to dc.



50229. The primary is the winding connected to the source, and the secondary is the winding connected to the load.



50230. A transformer consists of two or more cores that are electrically coupled on a common core.



50231. A reflective load is a load as it appears to the source in the primary of a transformer.



50232. A step-up transformer steps up power.



50233. A transformer changes ac to dc.



50234. A center tap (CT) is a connection at the midpoint of the secondary winding of a transformer.



50235. An autotransformer is one in which the primary and secondary are automatically coupled.



50236. What kVA rating is required for a transformer that must handle a maximum load current of 8 A with a secondary voltage of 2 kV?





50237. The turns ratio required to match an 80 source to a 320 load is





50238. When the turns ratio of a transformer is 20 and the primary ac voltage is 12 V, the secondary voltage is





50239. If a transformer has 50 turns in the primary winding and 10 turns in the secondary winding, what is the reflective resistance if the secondary load resistance is 250 ?





50240. A certain transformer has 400 turns in the primary winding and 2,000 turns in the secondary winding. The turns ratio is





50241. -----------gives the specification for polyethylene in contact with food stuff





50242. The minimum diameter of the green circle in the symbol for ‘vegetarian food’is -----------when the area of principal display panel is 200 cm2





50243. Which of the following is not an acidity regulator





50244. Incubation temperature employed in Eijkmans test





50245. Moseley count is related to





50246. Which of the following is not a type of energy source?





50247. When placed close together, two positively charged materials will





50248. The conductance of an 8 ohm resistance is





50249. Electrons in the outer orbit are called





50250. A thermistor is a type of





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