# A 40 W bulb is connected in series with a room heater. If now 40 W bulb is replaced by...

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?

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.

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Description : When current flows through heater coil it glows but supply wiring does not glow because?

Last Answer : When current flows through heater coil it glows but supply wiring does not glow because resistance of heater coil is more than the supply wires.

Description : The filament of an electric bulb is made of?

Last Answer : The filament of an electric bulb is made of tungsten.

Description : A 500 W bulb fitted with a reflector illuminates an area of 2 m x 2 m with an average illumination of 500 lux. The efficiency of the reflector is 50%. The efficiency of the bulb in lumens/watt is :

Last Answer : A 500 W bulb fitted with a reflector illuminates an area of 2 m x 2 m with an average illumination of 500 lux. The efficiency of the reflector is 50%. The efficiency of the bulb in lumens/watt is : 8

Description : Two resistances Rl and Ri are connected in series across the voltage source where Rl>Ri. The largest drop will be across?

Last Answer : Two resistances Rl and Ri are connected in series across the voltage source where Rl>Ri. The largest drop will be across Rl.

Description : Two resistors are said to be connected in series when?

Last Answer : Two resistors are said to be connected in series when same current passes in turn through both.

Description : The hot resistance of the bulb's filament is higher than its cold resistance because the temperature co-efficient of the filament is?

Last Answer : This  is  because  resistance  of  a  conductor  increases  with  increase  in  temperature .

Description : What is a Halogen Heater?

Last Answer : If you don't know what is a halogen heater, you probably might be living in a hot area where heaters are used often. A halogen heater is a small and portable device that can be plugged into an ... heater, plan to bring it home this winter and keep you children safe from the hazards of other heaters.

Description : How to Drain a Water Heater

Last Answer : How to Drain a Water Heater Overtime, water heaters can accumulate sludge and other mineral deposits that settle from the water. This affects the heater's performance. To Solve this problem, you should make ... wants. By draining a water heater, you'll be assured to get this anytime you want.

Description : Heater Fans

Last Answer : When somebody says "fan," almost all people think about a cooling system. After all, most people turn on a fan during hot summer days. But during those cold and dreary winter nights, when you want to ... modern. Depending on your choice of design, a heater fan can be a great addition to your home.

Description : Which heater to choose?

Last Answer : Battery life and the quality of utilities are not at their best in all homes. It is especially difficult for residents of corner apartments or upper floors - very little heat reaches them, so ... of a heat fan, the essential difference of which is the possibility of long-term continuous operation.

Description : State the function of super heater of a thermal power plant.

Last Answer : Function of Super heater: -  Its function is to increase the temperature of steam by absorbing heat from exhausted hot flue gases.

Description : State the location and function of i) Economizer ii) Feed water heater.

Last Answer : (i) Economizer:-  Location: - It is placed in the path of flue gases in between the exit from the furnace and the chimney. OR In The way of feed water before boiler. Function: - ... economizer. Function: - Its function is to increase the temperature of feed water by using blade steam.

Last Answer : A heater is rated as 230 V, 10 kW, A.C. The value 230 V refers to r.m.s. voltage.

Description : How To Light a Light Bulb with a Balloon

Last Answer : Materials: Hard rubber comb or balloon A dark room Fluorescent light bulb (not an incandescent bulb) SAFETY NOTE: DO NOT USE ELECTRICITY FROM A WALL OUTLET FOR THIS EXPERIMENT. Handle the glass ... end of the tube. (Fluorescent and incandescent light bulbs will be discussed in a future issue.)

Description : How to Remove a Broken Light Bulb from Socket

Last Answer : How to Remove a Broken Light Bulb from Socket Removing a broken light bulb is dangerous if you don't apply precautionary measures. Its jagged edges can cut your fingers with ease. In addition, the ... to hold the remaining pieces of the bulb together, so you can easily twist it off the socket.

Description : How to Change a Light Bulb

Last Answer : How to Change a Light Bulb If you're still hesitant about changing the light bulb that needed to be changed ten years ago, fear no longer. You don't need to count how many vampires, chickens ... this article, you'll surely be interested in learning how to remove a broken light bulb form socket.

Description : How to Choose an Energy Saving Light Bulb?

Last Answer : Popular in Russia Ilyich's bulbs are becoming a thing of the past, giving way to more modern lamps, which, as the name suggests, are designed to help conserve energy. What are their advantages ... light bulb for certain conditions, which will last a long time and will be efficient enough to use.

Description : About how many times longer would a 10 watt light bulb be able to burn compared to a 100 watt bulb with the same energy?  (A) 10 times longer (B) 100 times longer (C) Same time (D) None of the above

Last Answer : About how many times longer would a 10 watt light bulb be able to burn compared to a 100 watt bulb with the same energy?  (A) 10 times longer (B) 100 times longer (C) Same time (D) None of the above

Description : A 100-watt light bulb turned on for 8 hours uses :  (A) 800 Wh (B) 0.8 kWh (C) 8 kWh (D) None of the above

Last Answer : A 100-watt light bulb turned on for 8 hours uses :  (A) 800 Wh (B) 0.8 kWh (C) 8 kWh (D) None of the above

Description : Power factor of electric bulb is?

Last Answer : Power factor of electric bulb is unity.

Description : In a series circuit with unequal resistances?

Last Answer : In a series circuit with unequal resistances the highest resistance has the highest voltage drop.

Description : what is equivalent resistance when four 4 Ohm resistors are connected in i) series ii) parallel

Description : role of the series resistance connected in PMMC movement.

Last Answer : A PMMC Instrument can be used as voltmeter by just connecting a series resistance with the moving coil. This series resistance is called Voltmeter Multiplier. This combination of moving coil and ... current whose voltage is to be measured. Ideally the resistance of voltmeter should be infinite

Description : An inductor is connected in series with SCR to protect it from A) Excessive high voltage B) Excessive high dv/dt C) Excessive high di/dt D) Excessive large forward current

Last Answer : An inductor is connected in series with SCR to protect it from Excessive high di/dt

Description : Two 100W, 200V lamps are connected in series across a 200V supply. The total power consumed by each lamp will be in Watts

Description : We connected a 35V dc supply to a resistance of 600 Ohm in series with an unknown resistance R.A. voltmeter having a resistance of 1.2 kOhm is connected across 600 Ohm resistance and read 5v. The value of resistance R will be

Last Answer : We connected a 35V dc supply to a resistance of 600 Ohm in series with an unknown resistance R.A. voltmeter having a resistance of 1.2 kOhm is connected across 600 Ohm resistance and read 5v. The value of resistance R will be 2.4 kOhm

Description : A DC voltage source is connected across a series RLC circuit. Under steady-state conditions, the applied DC voltage drops entirely across the

Last Answer : A DC voltage source is connected across a series RLC circuit. Under steady-state conditions, the applied DC voltage drops entirely across the C only

Description : Consider a circuit with four resistors in series connected to a voltage source. What happens to the voltage across each resistor, if the value of each of the resistors is doubled? A) It will double B) It will remain the same C) It will be halved D) It will become zero

Last Answer : Consider a circuit with four resistors in series connected to a voltage source. What happens to the voltage across each resistor, if the value of each of the resistors is doubled? A) It will double B) It will remain the same C) It will be halved D) It will become zero

Description : What is the total resistance if 5 resistors of 20 Ω each are connected in series? A) 100 Ω B) 4 Ω C) 20 Ω D) None of these

Last Answer : What is the total resistance if 5 resistors of 20 Ω each are connected in series? A) 100 Ω B) 4 Ω C) 20 Ω D) None of these

Last Answer : When two D.C. series motors are connected in parallel, the resultant speed is normal speed.

Last Answer : In a A.C. series motor armature coils are usually connected to commutator through resistance.

Last Answer : When a D.C. series motor is connected to A.C. supply, the power factor will be low because of high inductance of field and armature circuits.

Description : Cells are connected in series in order to?

Last Answer : Cells are connected in series in order to increase voltage available.

Description : What Are Input & Output Devices?

Last Answer : Answer :Keyboards, Floppy disk are the examples of input devices. Printer, LED / LCD display, CRT Monitor are the examples of output devices.

Description : Analyze the effect of supply voltage on performance of LED as regards current, Lumen output, efficacy and life.

Last Answer : 1) Effect on Current:- In LED current depends upon supply voltage, if voltage get changes then current also change but this change in current will be control by resistors which are connected in series.  2) ...   4) Effect on Life:- If supply voltage is not stable then life of LED get reduced.

Description : With the help of N-channel JFET describe the effect of input voltage VGS on output current ID.

Last Answer : Working of N channel FET: * When a voltage is applied between the drain and source with a DC supply (VDD), the electrons flows from source to drain through narrow channel ... where the channel gets completely blocked and the drain current becomes zero is called pinch- off voltage.

Description : Define: i) Input Offset Voltage ii) Input offset Current iii) Input Bias Current iv) Output offset voltage

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Description : A linear network has a current input 4cos(ω t + 20º)A and a voltage output 10 cos(ωt +110º) V. Determine the associated impedance.

Description : Explain full wave bridged rectifier with the help of circuit diagram and input output waveform.

Last Answer : 1. In positive half cycle (0 to Π): The end A of the secondary winding becomes positive and end B negative. This makes diode D1 and D4 forward biased while diode D2 and D3 are reverse biased. These two diodes will ... D2 and D3 when it is conducting is as follows.  B - D2 - RL - D3 - A

Description : The largest change of input quantity for which there is no output of instrument is called ______ A) Dead time B) Dead input C) Dead output D) Dead zone

Last Answer : The largest change of input quantity for which there is no output of instrument is called Dead zone

Description : In a battery, the difference between the no-load voltage and the measured voltage output is called ________ A) Internal voltage B) Internal resistance C) External resistance D) All the above

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Description : Explain DC coupled drive circuit with unipolar output.

Last Answer : DC coupled drive circuit with unipolar output: The figure shows the circuit and waveforms

Description : Will you watch the new series Ash vs the Evil Dead?

Last Answer : Hail to the king, baby.

Description : Why is the Twilight series so famous?

Last Answer : I haven't read them but my wife is completely addicted to them. She's read the books several times and seen the movie probably 6 or 7 times, going with different people. Her 45 year old aunt loves them ... just fall in love with that guy. I don't know. It's definitely not limited to teens though.

Description : State the modification to be done in dc series motor to work satisfactorily as ac series motor. State applications of ac series motor.

Last Answer : Modifications are necessary in a dc series motor so that it operates satisfactorily on ac supply. The modifications are as follows:  1) AC series motor is built with a few field turns as ... and grinders 5) High speed vacuum cleaners 6) Sewing machines 7) Food processors 8) Drilling machine

Description : Explain with neat diagram series and parallel magnetic circuits.

Last Answer : Series magnetic circuit: When different magnetic materials having different lengths, cross sectional areas and permeability are connected one after another, in which same flux is established in different sections, then it is called series ... flux, Φ = Φ1 + Φ2  Path 1: BAFE  Path 2: BACD

Description : Write two applications of D.C. series motor.

Last Answer : The applications of D.C. series motor: 1. Cranes 2. Hoists 3. Trolley and cars 4. Conveyors 5. For traction work i.e. electric locomotives 6. Elevator 7. Air compressor

Description : Brake test on DC series motor

Last Answer : .embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; } .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }

Description : The loop equation for a series RLC circuit gives

Last Answer : The loop equation for a series RLC circuit gives

Description : Series parallel resistances problem solution

Last Answer : Series parallel resistances problem solution