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 Resistance of a material always decreases if temperature of material is decreased temperature of material is increased number of free electrons available become more none of the above is correct 2 / 25 Insulating materials have the function of storing very high currents conducting very large currents preventing a short circuit between conducting wires preventing an open circuit between the voltage source and the load 3 / 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 ? 48 Q 36 Q 64 Q 18 Q 4 / 25 Whether circuit may be AC. or D.C. one following is most effective in reducing the magnitude of the current. Capacitor Resistor Reactor Inductor 5 / 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 remain same decrease increase heater will burn out 6 / 25 Ohm’s law is not applicable to circuits with low current densities high voltage circuits vacuum tubes carbon resistors 7 / 25 Which is the best conductor of electricity ? Iron Copper Carbon Silver 8 / 25 Two resistors are said to be connected in series when both carry the same value of current sum of IR drops equals the applied e.m.f. total current equals the sum of branch currents same current passes in turn through both 9 / 25 Which of the following materials has a negative temperature co-efficient of resistance? Aluminum Carbon Copper Brass 10 / 25 All of the following are equivalent to watt except joules/sec. amperes x volts amperes/volt (amperes) ohm 11 / 25 Electric current passing through the circuit produces magnetic effect chemical effect luminous effect thermal effect 12 / 25 Which one of the following does not have negative temperature co-efficient ? Paper Rubber Aluminium Mica 13 / 25 The resistance of a conductor varies inversely as area of cross-section resistivity length temperature 14 / 25 With rise in temperature the resistance of pure metals decreases first increases and then decreases increases remains constant 15 / 25 If the efficiency of a machine is to be high what should be low ? kWh consumed True component of power Losses Input power 16 / 25 For which of the following ‘ampere second’ could be the unit ? Reluctance Power Energy Charge 17 / 25 A resistance having rating 10 ohms 10 W is likely to be a wire wound resistor variable resistor metallic resistor carbon resistor 18 / 25 With rise in temperature the resistance of semi-conductors remains constant first increases and then decreases decreases increases 19 / 25 Varistors are carbon resistors resistors with zero temperature coefficient insulators non-linear resistors 20 / 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 length of heating element should be increased none of the above length of heating element should be decreased 21 / 25 An electric filament bulb can be worked from Battery supply only D.C. supply only A.C. supply only All above 22 / 25 Which of the following statement is true both for a series and a parallel D.C. circuit? Voltages are additive Power are additive Currents are additive Elements have individual currents 23 / 25 Resistance of a tungsten lamp as applied voltage increases none of the above increases decreases remains same 24 / 25 When electric current passes through a metallic conductor its temperature rises. This is due to mutual collisions between metal atoms the release of conduction electrons from parent atoms mutual collisions between conducting electrons collisions between conduction electrons and atoms 25 / 25 Which of the following quantities remain the same in all parts of a series circuit ? Voltage Current Resistance Power 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
