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