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 tungsten lamp as applied voltage increases remains same none of the above decreases increases 2 / 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 remain same increase heater will burn out 3 / 25 If the efficiency of a machine is to be high what should be low ? True component of power Losses kWh consumed Input power 4 / 25 Which of the following statement is true both for a series and a parallel D.C. circuit? Power are additive Currents are additive Elements have individual currents Voltages are additive 5 / 25 Which of the following quantities remain the same in all parts of a series circuit ? Power Current Resistance Voltage 6 / 25 For which of the following ‘ampere second’ could be the unit ? Power Reluctance Energy Charge 7 / 25 Which one of the following does not have negative temperature co-efficient ? Rubber Paper Aluminium Mica 8 / 25 Which of the following materials has a negative temperature co-efficient of resistance? Copper Brass Aluminum Carbon 9 / 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 10 / 25 Varistors are insulators non-linear resistors resistors with zero temperature coefficient carbon resistors 11 / 25 Two resistors are said to be connected in series when same current passes in turn through both 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 12 / 25 With rise in temperature the resistance of pure metals remains constant increases first increases and then decreases decreases 13 / 25 All of the following are equivalent to watt except amperes/volt amperes x volts (amperes) ohm joules/sec. 14 / 25 Electric current passing through the circuit produces chemical effect luminous effect magnetic effect thermal effect 15 / 25 Insulating materials have the function of preventing a short circuit between conducting wires preventing an open circuit between the voltage source and the load conducting very large currents storing very high currents 16 / 25 A resistance having rating 10 ohms 10 W is likely to be a metallic resistor variable resistor carbon resistor wire wound resistor 17 / 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 decreased none of the above length of heating element should be increased length of heating element has no effect on heating if water 18 / 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 ? 36 Q 48 Q 64 Q 18 Q 19 / 25 Which is the best conductor of electricity ? Carbon Copper Iron Silver 20 / 25 Ohm’s law is not applicable to high voltage circuits vacuum tubes carbon resistors circuits with low current densities 21 / 25 With rise in temperature the resistance of semi-conductors increases decreases remains constant first increases and then decreases 22 / 25 An electric filament bulb can be worked from A.C. supply only D.C. supply only Battery supply only All above 23 / 25 Whether circuit may be AC. or D.C. one following is most effective in reducing the magnitude of the current. Reactor Capacitor Resistor Inductor 24 / 25 The resistance of a conductor varies inversely as area of cross-section temperature resistivity length 25 / 25 Resistance of a material always decreases if none of the above is correct number of free electrons available become more temperature of material is decreased temperature of material is increased 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
