Which two digits does the binary number system use?
Answer0 and 1
Binary is base 2, so every number is written using only the digits 0 and 1.
Tech · Facts & stats
E-Challenges facts & stats
7 fact-checked facts about electronics and computing basics, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
Which component stores energy chemically to power portable electronic devices?
AnswerBattery
A battery stores chemical energy and releases it as electrical energy when connected in a circuit.
Going deeper
How many bits are in one byte?
Answer8
A byte is made of 8 bits, enough to represent 256 different values.
What does LED stand for?
AnswerLight-emitting diode
An LED is a light-emitting diode, a semiconductor that gives off light when current flows through it.
What does CPU stand for?
AnswerCentral processing unit
The CPU, or central processing unit, carries out a computer's program instructions.
Expert level
What is the binary number 1010 in decimal?
Answer10
1010 in binary is 8 + 0 + 2 + 0, which equals 10 in decimal.
Which equation expresses Ohm's law?
AnswerV = I × R
Ohm's law says voltage equals current multiplied by resistance, written V = I × R.
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