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ELECTRICAL ENGINEERING QUESTIONS 3511-3515

35 11. The electric field at a point situated at a distance d from straight charged conductor is (a) proportional to d (b) inversely proportional to d (c) inversely proportional to d (d) none of the above Answer: (c) inversely proportional to d 35 12 __________ is the common method of applying brushes to the commntator. (a) Radial (b) Reaction (c) Trailing (d) All of the above Answer: (d) All of the above 35 13. An open coil has (a) zero resistance and inductance (b) zero resistance and high inductance (c) infinite resistance and normal inductance

ELECTRICAL ENGINEERING QUESTIONS PUBLISHED ON 12/06/2016

3506 . The electric field intensity at a point situated 4 metres from a point charge is 200 N/C. If the distance is reduced to 2 metres, the field intensity will be (a) 400 N/C (b) 600 N/C (c) 800 N/C (d) 1100 N/C Answer: (c) 800 N/C 3507 . A 500 turns solenoid develops an average induced voltage of 60 V. Over what time interval must a flux change of 0.06 Wb occur to produce such a voltage ? (a) 0.5 s (b) 0.1 s (c) 0.01 s (d) 55 s Answer: (a) 0.5 s 3508 . Which ofthe following materials is used in the manufacture of resistance grids to be used in the starters of large motors ? (a) Copper (b) Cast-iron

ELECTRICAL ENGINEERING QUESTIONS 3501-3505

3501. When a magnet is in motion relative to a coil the induced e.m.f. does not depend upon (a) pole strength of the magnet (b) motion of the magnet (c) number of turns of the coil (d) resistance of the coil Answer: (d) resistance of the coil 3502. The weight of copper of both armature and field windings decreases with _____ in number of poles. (a) decrease (b) increase (c) either of the above (d) none of the above Answer: (b) increase 3503. Which of the following is the unit of magnetic flux density ? (a) tesla (b) lumens (c) weber (d) none of the above Answer: (a) tesla 3504.  Substances which have permeability less than the permeability of free space are known as (a) ferromagnetic (b) paramagnetic

ELECTRICAL ENGINEERING WRITTEN TEST QUESTIONS WITH ANSWER -1009

1. For a D.C. generator when the number of poles and the number of armature conductors is fixed, then which winding will give the higher e.m.f. ? a) Lap winding b) Wave winding c) Either of (a) and (b) above d) Depends on other features of design Answer: b) Wave winding 2. The operation of a D.C. machine with large air gap lengths is comparatively a) quiet b) noisy c) either of the above d) none of the above Answer: a) quiet 3. For which of the following applications a D.C. motor is preferred over an A.C. motor ? a) Variable speed operation b) High speed operation c) Low speed operation d) Fixed speed operation Answer: a) Variable speed operation 4. The stator of a D.C. machine comprises of a) main poles 6) interpoles

105 ELECTRICAL ENGINEERING QUESTIONS

1. What is the mejority charge carrer of p-type semiconductor ? i)Holes ii)Electrons iii)Protons v)Nuetrons 2. which of the following electrical conductor used in a Battery ? 1 Gas 2 water 3 silver 4 Aluminium. 3. what is the lightning arrester maximum voltage is→_____ a . below 10KV b. 10KV c. 100 kv d. above 100MV 4. The magniture of XL increases by increasing 1. Voltage 2. Current

SCIENTIFIC AND CRITICAL THINKING QUESTIONS AND ANSWERS

Consider the following passage and answer the questions that follow accordingly. Humans may have reached northern Europe (including England) 200 000 years earlier than previously thought. Stone tools found in England suggest that early humans were there 700 000 years ago. The stone tools were discovered at a site in Suffolk. The tools have been dated using several methods. Firstly, the magnetic polarity of iron-containing minerals in the sedimentary rocks where the tools were found is aligned north-south, just as it is today. Since the Earth’s magnetic field underwent a polarity reversal 780 000 years ago, the site must be younger than that. The tools were found beneath glacial ice deposits laid down during a period 450 000 years ago when the region was blanketed in ice, so they must be older than this. Also present at the site were fossils of a water vole Mimomys, which was superseded by another vole species called Arvicola around 500 000 years ago. A new amino-acid dating techniqu

CARTOON BASED QUESTIONS

1.  The woman in the cartoon has found the man’s ‘private heartache’ a. confusing. b. intriguing. c. distressing. d. uninteresting. Answer:  d. uninteresting. 2. The woman suggests that, for a first date, the man has a. lacked generosity. b. revealed too much about himself. c. been too reserved. d. chosen an inappropriate venue. Answer:  b. revealed too much about himself.