lab 4

The resistance of wire increases from 40 – ohm at 20 0C to 50 – ohm at 70 0C. Find the temperature coefficient of resistance at 0 0C.

Do you know how a diode and an LED are related to semiconductors? Use a diagram with a short explanation of the symbol.

Enumerate 10 important Electrical Materials and briefly describe each.

A certain cooper wire has a resistance of 25 ohms at 10°C. Take the temperature coefficient at 10°C to be 0.00409/°C. What must be the maximum operating temperature of the wire if its resistance is to increase by most 30%? CS Scanned with CamScanner

4. Give the 3 light color and write down your preferred light color.    5. Enumerate 10 important Electrical Materials and briefly describe each.

Please help me with this worksheet. Please fill in the table, answer the questions and make both circuits A and B on Tink

Can you draw an illustration of AC current and DC current.

#5

What are the nominal resistance and tolerance of a resistor with color bands in the order of violet-green--red-silver from an end of the resistor casing toward the middle?

Why are these versions of diode circuits called clipping circuits?   **please type it using keyboard NOt handwriting**

The polarization of an LED is similar to the polarization of the diode, but a current limiting resistor must always be connected in series with the LED. Both the LED and its current limiting resistor must be placed in series with the load. a) The above statement is correctb) The above statement is incorrect.

What is a Semiconductor? Explain the properties of a Semiconductor such as its physics, etc?     you better explain a little longer and illustrated pls

Can you help me set up my breadboard so I can ... Measure the values of base current, _________, collector current, _________ ?

2. A bank of nickel-cadmium cells is used as the emergency lighting supply for a hospital. There are 100 cells connected in series and each has an A-hr rating of 120 A-hr. The bank has to be replaced, and the manufacturer is no longer supplying nickel-cadmium cells. It is decided to replace the cells with lead-acid cells. How many lead-acid cells will be required if each has an A-hr rating of 60 A-hr, and how should they be connected?

An over head string has 4 insulators. The voltage between the steel pin of the second insulator and metal cap of the fourth insulator is represent by *

Why do we prefer to use semiconductor crystals with the lowest number of dislocations?

Pls i need the answer of this questions

Ohm's law is not applicable to Semiconductors D.C. circuits Small resistors O High currents

What should I do when I get a current like 0.263187845A, should I round into the simplest form, or keep it and convert into mA?

What are the nominal resistance and tolerance of a resistor with color bands in the order of violet-green--red-silver from an end of the resistor casing toward the middle? Note: DRAW THE DIAGRAM

what is the semiconductor

Draw a figure and show the complete solution.

nichrome ribbon resistor elements each has a resistance of 1 ohm. the element is made from sheet of nichrome alloy, 0.025 cm thick. if the width 9f the ribbon is 0.3 cm , what is the length is required per element? assume specific resistance of nichrome alloy to be 10g micro ohm-cm

Nichrome ribbon resistor elements each has a resistance of 1 ohm. The element is made from sheet of nichrome alloy, 0.025 cm think. If the width of the ribbon is 0.3cm, what length is required per element in cm? Assume specific resistance of nichrome alloy to be 109microOhm-cm.

Draw the block diagram of digital Multimeter and explain the measurement of D.C voltage

D3 D1 V1 sine R1 1 kHz D2 D4 Given: • V1 = 5.9 Vrms • R1 = 7 kOhm • Diode voltage = 0.9 V What is the maximum voltage across resistor R1 (in V)?

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A copper wire has a resistance of 0.85 ohm at 200C. What will be its resistance at 400C ? Temperature coefficient of resistance of copper at 00C is 0.004/0C.