By Surendra | June 10, 2020 0 Comment 0% 10 Created by Surendra Current Electricity Quiz in English Set 1 All Important Question Answers for Electrician Related Exams 1 / 25 With rise in temperature the resistance of pure metals remains constant decreases first increases and then decreases increases 2 / 25 The resistance of a conductor varies inversely as temperature area of cross-section resistivity length 3 / 25 Varistors are non-linear resistors carbon resistors resistors with zero temperature coefficient insulators 4 / 25 Insulating materials have the function of storing very high currents preventing an open circuit between the voltage source and the load preventing a short circuit between conducting wires conducting very large currents 5 / 25 With rise in temperature the resistance of semi-conductors remains constant first increases and then decreases increases decreases 6 / 25 In an electric kettle water boils in 10 m minutes. It is required to boil the boiler in 15 minutes using same supply mains length of heating element has no effect on heating if water none of the above length of heating element should be increased length of heating element should be decreased 7 / 25 Ohm’s law is not applicable to circuits with low current densities carbon resistors vacuum tubes high voltage circuits 8 / 25 An electric filament bulb can be worked from Battery supply only D.C. supply only All above A.C. supply only 9 / 25 When electric current passes through a metallic conductor its temperature rises. This is due to the release of conduction electrons from parent atoms mutual collisions between conducting electrons mutual collisions between metal atoms collisions between conduction electrons and atoms 10 / 25 Which is the best conductor of electricity ? Iron Carbon Silver Copper 11 / 25 Which of the following statement is true both for a series and a parallel D.C. circuit? Elements have individual currents Power are additive Currents are additive Voltages are additive 12 / 25 A resistance having rating 10 ohms 10 W is likely to be a wire wound resistor carbon resistor variable resistor metallic resistor 13 / 25 If the efficiency of a machine is to be high what should be low ? Input power True component of power kWh consumed Losses 14 / 25 Resistance of a tungsten lamp as applied voltage increases increases decreases remains same none of the above 15 / 25 Which one of the following does not have negative temperature co-efficient ? Paper Aluminium Rubber Mica 16 / 25 The resistance of a parallel circuit consisting of two branches is 12 ohms. If the resistance of one branch is 18 ohms what is the resistance of the other ? 18 Q 36 Q 48 Q 64 Q 17 / 25 Whether circuit may be AC. or D.C. one following is most effective in reducing the magnitude of the current. Resistor Inductor Reactor Capacitor 18 / 25 A 40 W bulb is connected in series with a room heater. If now 40 W bulb is replaced by 100 W bulb the heater output will decrease heater will burn out increase remain same 19 / 25 Which of the following quantities remain the same in all parts of a series circuit ? Current Voltage Resistance Power 20 / 25 Resistance of a material always decreases if none of the above is correct temperature of material is decreased number of free electrons available become more temperature of material is increased 21 / 25 Electric current passing through the circuit produces luminous effect magnetic effect thermal effect chemical effect 22 / 25 Two resistors are said to be connected in series when same current passes in turn through both total current equals the sum of branch currents both carry the same value of current sum of IR drops equals the applied e.m.f. 23 / 25 For which of the following ‘ampere second’ could be the unit ? Energy Charge Reluctance Power 24 / 25 All of the following are equivalent to watt except joules/sec. amperes/volt (amperes) ohm amperes x volts 25 / 25 Which of the following materials has a negative temperature co-efficient of resistance? Copper Carbon Aluminum Brass कृपया सही सूचना भरें ताकि सर्टिफिकेट ईमेल पर भेजा जा सकें। NameEmailPhone NumberDistrictSchool/Coaching Name Your score is LinkedIn Facebook VKontakte 0% Restart quiz आपको यह क्विज अच्छी लगी तो 5 स्टार रेटिंग जरुर दें । Send feedback
