(a) Determine the colour bands and indicate the resistance range values (minimum - maximum) for each of the following 4-band resistors: 1. 850±5% I. 47 kQ+ 10%

Q: A tungsten lamp  filament has a temperature of 20500C and a resistance of 500 Ω when taking normal…

A: tungsten filament have resistance of 500 ohm at 20500 C. To find the resistance at 25 oC we will use…

Q: Q3. b) Describe the valence band, conduction band, and forbidden energy gap with the help of energy…

A: In this question we Describe the valence band, conduction band, and forbidden energy gap with the…

Q: 1. Enter the color code and numerical values in the Table 1.1, for the four band "thin- film" carbon…

A: Color code and numerical code is entered in table as shown below

Q: The artificial source of light is O Discharge lamp O Arc lamp O Incandescent lamp O All of the…

A: Artificial light source- Light can be produced by the artificial method. The different light sources…

Q: When the electric field applied to GaAs specimen is less than the threshold electric field, the…

A: we need to find what will happen with current if the applied electric field in GaAs is less than the…

Q: 2. An incandescent light bulb uses a cold filament of tungsten that is 580 mm. long with a diameter…

A:

Q: Explain the vaxi ous applicatione of ae poten tiometers2

A: A potentiometer that is used for measuring a phase and magnitude of unknown emf using the known emf…

Q: 2. A cloud of ["2.5x10" ) ^19 electrons move past a given point every 2 seconds. How much is the…

A:

Q: At room temperature, the electrical conductivity of an intrinsic Si is 84 / (2-m), the energy gap is…

A: To find the Electrical conductivity of Si at 80° C temperature

Q: A copper coil has a resistance of 200 ohms when its mean temperature is 0 degree centigrade.…

A: Given: Resistance of the copper coil at 0 degree centigrade, R0=200 Ω T1=0° CT2=80° Cα=0.004041 C-1

Q: 1. The following resistance values of a platinum resistance thermometer were measured at a range of…

A: Sr. No Resistance Temp 1 307 200 2 314 230 3 321 260 4 328 290…

Q: Calculate for the electric field strength between the two parallel plates separated by a distance of…

A:

Q: Please draw the charging waveform of a Lead Acid Battery.

A: It is asked to draw the charging waveform of a Lead Acid Battery.

Q: A copper wire has a resistance of 5 ohms at 20 degree Celsius. Caluclate its resistance is the…

A: Given that R0=5 ohmT1=20°CT2=65°C Although formula of Resistance at T2 temperature is  R=R01+αT2-T1…

Q: Which of the following shows the CORRECT unit of the lighting concept? a Illuminance: lumen (Im) b.…

A: The brightness seen by the human eye can be used to subjectively measure light. Candles, lumens,…

Q: An alternating voltage, given by v = 100 sin 314t is connected in series with a diode. The average…

A:

Q: Prove the probability of finding electrons equal zero, if E > EF at 0°k temperature.

A: Prove that the probability of finding electrons equal to zero

Q: In order to increase the light absorption in solar thermal collectors; absorber plates should have…

A: Different energy sources are required in day to day life. These energy sources can be renewable or…

Q: 400 A and 35 volts of current is flows through the arc welding process. The length of the arc is 2.5…

A: Given  400 A and 35 volts of current is flows through the arc welding process. The length of the arc…

Q: Question No.9. In Arc weldingcoated electrode provide any of these Tunctions except heat sourc…

A: The explanation is as follows.

Q: .a. Which of the following best describes the arc tube for a high-pressure sodium lamp? A. Long and…

A: sodium-vapor lamp is a gas-discharge lamp that uses sodium in  excited state to produce light at…

Q: Submit to comple nce between twor = of the choices electric permiti conductivity ar electric conduct

A:

Q: The deflection angle of the pointer of an ideal moving iron meter is 20° for 1 ampere dc current. If…

A: Given, Deflection angle, θ1=200 Current, I1= 1 A Current, I2= 3 sin(314t) A               I2= 32 A…

Q: value of current i(t) (milli ampere) will flow in following circuit having resistance of 21 ohms &…

A:

Q: 1. What is the reading value of the voltmeter when the excitation circuit is оpen

A: The reading value of the voltmeter will be residual voltage.

Q: The suitable lamps for street lighting are O a. Mercury vapour lamps O b. Sodium discharge lamps O…

A:

Q: Which of the following standard reference electrode is best described with the following statements?…

A: Find out standard reference electrode in the given electrode types based on given sentences ?

Q: A platinum coil has a resistance of 3.146Ω at 400C and 3.767Ω at 1000C. Plot/graph the Resistance…

A: This question is from "Instrumentation". Under which we are going to study R.T.D (RESISTANCE…

Q: 6. Peak to peak ripple is defined as a) the difference between zero voltage and maximum b) the…

A: According to question: 6) Peak to peak ripple in terms of voltage is defined as…

Q: Differentiate between Solar Irradiance, Solar Irradiation and Peak Sun Hour. State the explaination

A: Solar Irradiance is as follows: - The sun based irradiance is the yield of light energy from the…

Q: Question 6 (a) Explain the working principles of: (i) thermistor. (ii) resistance temperature…

A: We are authorized to answer one question at a time, since you have not mentioned which question you…

Q: The amount of current the battery can produce for a period of 20 hours at 80 degrees Fahrenheit is…

A: An ampere-hour (abbreviated Ah, or sometimes amp hour) is the amount of energy charge in a battery…

Q: A barium titanate crystal has a thickness of 2 mm. Its voltage sensitivity is 12*10-3  Vm/N. It is…

A: Given: Crystal Thickness, t= 2 mm Voltage sensitivity, g=12×10-3 Vm/N Subjected Pressure,  P= 0.5…

Q: Question 11 Given the band diagram for carbon (graphite) below, if you want to operate graphite as…

A: Choose the correct option Band diagram of the graphite is given What is value Applied voltage if we…

Q: An incandescent light bulb uses a cold filament of tungsten that is 580 mm. long with a diameter of…

A: In this question,  Resistance at To = 20° is 10 ohm Find the temperature if coefficient = 0.0045…

Q: The following resistance of a platinum resistance thermometer were measured at a range of…

A: (i) Sensitivity of thermometer  From the table is Resistance & input is temperature

Q: Q23. Dielectric breakdown means that the material is. Conductor Semi-conductor Insulator None of…

A:

Q: 6. Indicate the type of the following panel, justify : 2. a. Amorphous Silicon b. Mono Crystalline…

A: 1) this is the amorphous silicon because in it a glossy layer is used on the top.

Q: Discuss the different types of solar collectors which are muitable for electricity generation.

A: Solar energy is being widely used nowadays due to energy crisis. Photovoltaic arrays and modules are…

Q: Deterne the conductance of a lightbulb when operating at 250 V, 100W. (In decimal number)

A:

Q: What is the total lumen quantity in a sphere that measures 2-meter radius and with a light source…

A:

Q: Ohm's law is applicable to Semi-conductors Vacuum tubes electrolytes O None of these

A: first we will write the limitations of ohms law. then we will eliminate the answer.

Q: 3. Suppose that these atomic configurations belong to Al at 30 °C, Select the correct answer about…

A: Electrical Resistivity of crystal lattice structures with defects

Q: What is the maximum value of luminous efficacy for any light fixture * 100% 95%

A: The explanation is as follows.

Q: The efficiency for incandescent light bulbs is typically about 14 lumens per watt (lm/W) and that…

A:

Q: Nichrome wire is used in some radiative heaters. What length of Nichrome wire, having a…

A: Given: A=5 mm2 and T=500°C Required: Length of the nichrome wire.

Q: Figure 1 shows 4 different equivalent circuits. Which of these circuits accurately represents the…

A: There different types of solar cell model based on diodes used like single diode model, two diode…

Q: 1. What is the reading value of the voltmeter when the excitation circuit is open ?

A: Since,you have asked multiple question.We are allowed to answer one question at a time.We will solve…

Q: What potential difference is required across an 8-0 resistor to cause 27.78 A to flow through it?

A: Given, The potential difference, V =? Resistance, R=8 Ω Current, I=27.78 A

Photoelectric

The photoelectric effect occurs when light (or similar incident radiation, including X-rays) falls on material together with a metal plate and causes it to emit electrons. The discovery of the photoelectric effect led to important new theories (and to a Nobel Prize for Albert Einstein). Photoelectric cells, or photocells, are utilized in burglar-alarm light detectors and garage-door openers (each employs a through-beam of light this is broken when something movements throughout it), and also to play soundtracks on film movies (in which a light beam shines through the soundtrack encoded at the film and is "read" with the aid of the photocells).