82 views
Is the anode or cathode longer in LED ?

1 Answer

Answer :

In LED anode terminal is longer and cathode terminal is smaller.

Like 0 like

Please log in or register to answer this question.

Related questions

125 views

Description : Which is the positive terminal anode or cathode?

Last Answer : Anode is positive terminal and cathode is negative terminal.

1 answer
131 views

Description : What is the difference between an anode and a cathode?

Last Answer : The anode is positively charged electrode and the cathode is negatively charged electrode.

1 answer
202 views

Description : Do electrons flow from the anode to the cathode?

Last Answer : electrons flow from cathode to anode because the electron has a negative charge and repels from the negatively charged cathode whilst also attracting to the positively charged anode.

2 answers
934 views

Last Answer : SCR turned off when the anode current falls below holding current.

1 answer
98 views

Description : Is an anode positive or negative?

Last Answer : The anode is positively charged electrode.

1 answer
189 views

Description : The SCR would be turned OFF by voltage reversal of applied anode-cathode ac supply frequency of A) 10 kHz B) 10 Hz C) 5 kHz D) 5 Hz 

0 answers
98 views

Description : It is an unidirectional device that blocks the current flow from cathode to anode   (A) SCR (B) PCR (C) VCR (D) DCR

Last Answer : It is an unidirectional device that blocks the current flow from cathode to anode SCR 

1 answer
0 views

Description : Corrosion is an electrochemical phenomenon. The oxygen in moist air reacts as follows: O2(g) + 2H2O(l) + 4e– → 4OH– (aq). Write down the possible reactions for corrosion of zinc occurring at anode, cathode, and overall reaction to form a white layer of zinc hydroxide.

0 answers
0 views

Description : a. Why does the cell voltage of a mercury cell remain constant during its 10 lifetime? b. Write the reaction occurring at anode and cathode and the products of electrolysis of aq KCl. c. ... solution when the hydrogen gas electrode shows a potential of -0.59 V at standard temperature and pressure?

0 answers
0 views

Description : (a) Identify the gasses evolved at the anode and cathode in the above experimental set up. (b) Name the process that occurs. Why is it called so? (c) Illustrate the reaction of the process with the help of a chemical equation.

0 answers
5 views

Description : Corrosion of a metal occurs at the (a) Anode (b) Cathode (c) Both anode and cathode (d) None of the above

Last Answer : Ans:(a)

1 answer
11 views

Description : (3) made cathode and a pure nickel red, the anode Explanation: Electroplating is the deposition by electrolysis of a coating of metal upon a conducting surface. The simplest system makes the object to be ... on the spoon is called reduction and, therefore, the spoon is also referred to as a cathode.

Last Answer : Which of the following is not a method of preparing oxygen? (1) Electrolysis of water (2) Fractional distillation of liquid air (3) Decomposition of potassium permanganate (4) Decomposition of manganese dioxide

1 answer
4 views

Description : Electrolysis of an aqueous solution of copper sulphate using copper electrodes gives (1) Copper at eathode and oxygen at anode. (2) Copper at anode and oxygen at cathode. (3) Copper at cathode and anodes dissolve to give copper. (4) Hydrogen at cathode and oxygen at anode.

Last Answer : (1) Copper at eathode and oxygen at anode. Explanation: Copper is deposited at the cathode and is dissolved at the anode. Consequently the concentration of copper ions in solution remains constant. This can be used as a method of purification of copper as only pure copper is deposited at the cathode

1 answer
3 views

Description : In electro-refining, the pure metal is deposited on – (1) vessel (2) electrolyte (3) cathode (4) anode

Last Answer : (3) cathode Explanation: In electro-refining, the anodes consist of unrefined impure metal, and as the current passes through the acidic electrolyte the anodes are corroded into the solution so ... pure metal onto the cathodes. Electrolytic refining is used to extract impurities from crude metals.

1 answer
4 views

Description : The component labeled 'CR1' in the circuit shown in the illustration __________________. EL-0085 A. varies its anode/cathode polarity depending on 'RL' current B. rectifies the varying voltage from the ... reactance to smooth ripple D. establishes a constant reference voltage for the base of 'Q1'

Last Answer : Answer: D

1 answer
4 views

Description : The device in figure 'B' shown in the illustration will conduct when the ____________. EL-0067 A. base-emitter is forward biased and the collector-base is reverse biased B. anode-cathode is forward ... is reversed biased D. terminal 1-2 is forward biased and the emitter-terminal 1 is reverse biased

Last Answer : Answer: B

1 answer
1 view

Description : The leads of the device in figure 'B' shown in the illustration are named _________. EL-0065 A. source, gate and drain B. emitter, base and collector C. emitter, base 1 and base 2 D. anode, cathode and gate

Last Answer : Answer: A

1 answer
2 views

Description : Leads on the device in figure 'B' shown in the illustration are named ____________. EL-0067 A. source, gate and drain B. emitter, base and collector C. emitter, base 1 and base 2 D. anode, cathode and gate

Last Answer : Answer: D

1 answer
7 views

Description : Which of the following statements comparing transistors and vacuum tubes is correct? A. Both transistors and vacuum tubes have a cathode that must be heated to give off electrons. B. A vacuum tube must ... flow. D. The anode of both transistors and vacuum tubes must be heated to give off electrons.

Last Answer : Answer: B

1 answer
1 view

Description : The leads of the device in figure 'A' shown in the illustration are named the _______________. EL-0065 A. source, gate and drain B. emitter, base and collector C. emitter, base 1 and base 2 D. anode, cathode and gate

Last Answer : Answer: C

1 answer
5 views

Description : The input signal of a travelling wave tube is introduced at A. Cathode B. Anode C. Cathode end of the helix D. Collector end of the helix

Last Answer : C. Cathode end of the helix

1 answer
3 views

Description : Caustic soda is produced in a mercury cell having anode and cathode made respectively of moving mercury and (A) Moving mercury and graphite (B) Graphite and moving mercury (C) Moving mercury and carbon (D) Moving mercury and crimped steel wire

Last Answer : (B) Graphite and moving mercury

1 answer
5 views

Description : A squid axon is placed on stimulating electrodes, and an intracellular electrode is inserted and connected through a cathode-ray oscilloscope (CRO) to an indifferent electrode. When the axon is stimulated, the latent ... . 40 m/s d. 67.5 m/s e. This cannot be determined from the information given

Last Answer : 30 m/s

1 answer
11 views

Description : What products do we get on electrolysis of saturated brine using steel cathode and graphite anode in an electrolytic cell? (A) Cl2 & Na (B) Cl2 & H2 (C) O2 & H2 (D) Cl2 , H2 & NaOH solution

Last Answer : (D) Cl2 , H2 & NaOH solution

1 answer
8 views

Description : Pick out the wrong statement. (A) The X-rays cannot be deflected by electric field unlike cathode rays (B) The intensity of X-rays can be measured by ionisation current produced due to the ... the anode-cathode voltage (D) Crystal structure of a material can be studied by an electron microscope

Last Answer : (C) The quality of X-rays can be controlled by varying the anode-cathode voltage

1 answer
5 views

Description : Pick out the wrong statement about coating/electroplating of metals. (A) Phosphate coating is used as an excellent base for paints & enamels (B) Phosphate coating is less corrosion resistant than ... coating metal is made the anode (D) Calorising is the process of coating steel with chromium

Last Answer : (D) Calorising is the process of coating steel with chromium

1 answer
9 views

Description : Identify the correct statement with reference to the extractive metallurgy of aluminium. (A) The electrolyte consists of molten Na3AlF6 with approximately 1 to 8% Al2O3 (B) Approximately 80% of ... is immediately vaporised (D) Anode effect sets in when the cryolite concentration goes below 40%.

Last Answer : (A) The electrolyte consists of molten Na3AlF6 with approximately 1 to 8% Al2O3

1 answer
3 views

Description : Inverter cell anode and cathode of the…………. cell is used for vehicle (a) Copper electrode zinc (b)Zinc copper (c) Aluminium zinc (d)Nickel Cobalt

Last Answer : (a) Copper electrode zinc

1 answer
30 views

Description : In the common dry cell, the zinc atoms are: w) reduced at the cathode x) oxidized at the cathode y) oxidized at the anode z) reduced at the anode

Last Answer : ANSWER: Y -- OXIDIZED AT THE ANODE

1 answer
23 views

Description : In electro-refining, the pure metal is deposited on (1) vessel (2) electrolyte (3) cathode (4) anode

Last Answer : cathode

1 answer
46 views

Description : When a spoon is to be electroplated with nickel the spoon is (1) dipped in a nickel sulphate solution (2) made anode and a pure nickel rod, the cathode (3) made cathode and a pure nickel red, the anode (4) coated with nickel sulphate and dried

Last Answer : made cathode and a pure nickel red, the anode

1 answer
38 views

Description : Electrolysis of an aqueous solution of copper sulphate using copper electrodes gives (1) Copper at cathode and oxygen at anode. (2) Copper at anode and oxygen at cathode. (3) Copper at cathode and anodes dissolve to give copper. (4) Hydrogen at cathode and oxygen at anode.

Last Answer : Copper at cathode and oxygen at anode.

1 answer
48 views

Description : Define cathode and anode.

Last Answer : Cathode: The electrode which is connected to the negative terminal (pole) of a battery is called as cathode. It is a negative electrode.  Anode: The electrode which is connected to the positive terminal (pole) of a battery is called as anode. It is a positive electrode. 

1 answer
104 views

Description : If a forward voltage (less than forward breakover voltage) is suddenly applied across anode and cathode of a thyristor, it may result into   (a) Damage to the thyristor (b) Premature triggering of the ... because of high dV/dt (c) Reduced holding current of the thyristor (d) All of the above  

0 answers
173 views

Description : When cathode is positive with respect to anode in an SCR, the number of blocked p-n junctions is   (a) 1 (b) 2 (c) 3 (d) 4 

0 answers
128 views

Description : In a thyristor, the magnitude of anode current will:

Last Answer : In a thyristor, the magnitude of anode current will: Not change with any variation in gate current

1 answer
333 views

Description : Anode current in an thyristor is made up of   (A) electrons only (B) electrons or holes (C) electrons and holes (D) holes only

Last Answer : Anode current in an thyristor is made up of electrons and holes 

1 answer
312 views

Description : Draw full bridge & half bridge configuration with common cathode.

Last Answer : Half Bridge Configuration: Full Bridge Configuration: 

1 answer
2.0k views

Description : What is Cathode ray tube ?

Last Answer : Cathode ray tube (CRT) is a vacuum tube using cathode rays to generate a picture on a fluorescent screen. These cathode rays are in fact the electron beam deflected and modulated, which impinges on a ... tube used to display data in a visual form. Picture tube of a television or computer terminal.

3 answers
91 views

Description : . In a common anode, seven-segment LED display, an individual LED will light if a negative voltage is applied to what element?

Last Answer : The cathode.

1 answer
157 views

Description : How do you know the voltage of an LED?

Last Answer : After connecting led to a DC source we can measure the voltage of led by connecting a voltmeter across it.  But voltage rating of the led is given by the manufacturers. Or we can ... in the market For more doubts connect with me in linkdin [email protected] 

2 answers
194 views

Description : What is the voltage of a red LED?

Last Answer : A red led requires 2v to light. LEDs requires different amounts of voltage ranging between 1.8 and 3.3 depending on the intensity and color of the Led.

4 answers
0 views

Description : In Fig(a) the forward bias ideal diode is D. The applied voltage at anode varies with time as shown in Fig(b). The variation of current in circuit as a function of time is (knee voltage of diode = 0.5 V)

0 answers
2 views

Description : Why does DNA move towards the anode in gel electrophoresis? -Biology

Last Answer : answer:

1 answer
1 view

Description : Which action is performed on the anode ?

Last Answer : The oxidation process is completed at the anode.

1 answer
1 view

Description : What is used as an anode in X ray machine ?

Last Answer : Copper is used as an anode in X ray machines.

1 answer
1 view

Description : What is anode ?

Last Answer : An electric gate connected to the negative end of a power source is called an anode. Oxidation occurs at the anode.

1 answer
2 views

Last Answer : Anode াত negatively charged.

1 answer
2 views

Description : A gas P is obtained at anode during the electrolysis of brine. The gas P when treated with excess of `NH_3` released a diatomic gas Q. Find the value

Last Answer : A gas P is obtained at anode during the electrolysis of brine. The gas P when treated with excess of `NH_3` ... x & y are the molar mass of P and Q.

1 answer
0 views

Description : Electrolytic reduction of `Al_(2)O_(3)`. Electrolyte (`Al_(2)O_(3)+"cryolite")` Anode: Graphite rods. Coke powder is spreadded over the molten electro

Last Answer : Electrolytic reduction of `Al_(2)O_(3)`. Electrolyte (`Al_(2)O_(3)+"cryolite")` Anode: Graphite rods. ... of molten aluminium by air D. (a) both (b)

1 answer
...