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⁞ Electrical and Electronics Engineering

Engineering ➤ Electrical and Electronics Engineering ➤ Voltage-Current-And-Resistance
Question 16
Q16.  Electrons in the outer orbit are called
 

Answer :  valences


Electrons in the outer orbit are called valences.
⚔ DISCUSS

Question 17
Q17.  A two-terminal variable resistor is known as a
 

Answer :  rheostat


A two-terminal variable resistor is known as a rheostat. Rheostat is a variable resistor, which is used to control the flow of electric current by manually increasing or decreasing the resistance.
⚔ DISCUSS

Question 18
Q18.  Eight-tenths coulomb passes a point in 4 s. The current in amperes is
 

Answer :  0.2 A


given; Q = 8/10
t = 4 s

Now current, i = Q / t
i = (8/10)/4
i = 2/10;
i = 0.2 A

⚔ DISCUSS

Question 19
Q19.  When the current is 2.5 A, how many coulombs pass a point in 0.2 s?
 

Answer :  0.5 C


Since, I = Q/T

Therefore,Q = I × T = 2.5 × 0.2 = 0.5 C
⚔ DISCUSS

Question 20
Q20.  The colored bands for a 4,700 ohm resistor with a ten percent tolerance are
 

Answer :  yellow, violet, red, silver


Yellow = 4
Violet = 7
Red = 2
Silver= 10% tolerance

So, (47 × 102)
= 4700 ohm

Remember,

BLACK-0 BROWN - 1
RED - 2
ORANGE - 3
YELLOW - 4
GREEN - 5
BLUE - 6
VIOLET - 7
GREY - 8
WHITE - 9

tolerance, Gold-5% and Silver 10%.
⚔ DISCUSS

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