Electronics - Voltage and Current

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Exercise : Voltage and Current - General Questions
1.
What is the color code for a 220 omega.gif 5% resistor?
Red, Red, Brown, Gold
Orange, Orange, Black, Gold
Red, Red, Black, Gold
Red, Red, Brown, Silver
Answer: Option
Explanation:
Resistor colour coding series:

Black   0 
Brown   1 
Red     2 
Orange  3 
Yellow  4 
Green   5 
Blue    6 
Violet  7  
Gray    8   
White   9 
None    20% 
Silver  10% 
Gold    5% 

Therefore Red, Red, Brown, Gold 
           2    2    101    5% 

 = 22 x 10 = 220 ohm 5% (tolerance). 

Video Explanation: https://youtu.be/8YHFQCqBGcA


2.
If 60 J of energy are available for every 15 C of charge, what is the voltage?
4 V
60 V
15 V
0.25 V
Answer: Option
Explanation:
No answer description is available. Let's discuss.

3.
An atom's atomic number is determined by the number of:
neutrons minus protons
protons
electrons
neutrons
Answer: Option
Explanation:
No answer description is available. Let's discuss.

4.
A voltage will influence current only if the circuit is:
open
insulated
high resistance
closed
Answer: Option
Explanation:
No answer description is available. Let's discuss.

5.
Which resistive component is designed to be temperature sensitive?
Thermistor
Rheostat
Potentiometer
Photoconductive cell
Answer: Option
Explanation:
No answer description is available. Let's discuss.