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