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