magnetism

Question 1

colours of the sides of magnet

Answer 1

north(red) and south(blue)

Question 2

elements that can be magnetized

Answer 2

mild steel, iron, nickel, cobalt

Question 3

which cannot be magnetized?
mild steel or stainless steel?

Answer 3

stainless steel

Question 4

explain what is magnetic field

Answer 4

magnetic field is a region where a magnet exerts a magnetic force on another magnet

Question 5

what are the 2 types of magnets?

Answer 5

permenant magnet where magentism need to be ‘turned on and off’ such as magnetic strips strong information eg. IC no. and admission no.
temportary magenet where magnetism must be there all the time eg. magnetic compass

Question 6

how many bits are contains in 1 byte

Answer 6

1 byte = 8 bits

Question 7

draw the table for binary, decimal and hexadecimal digits

Answer 7

refer to notes

Question 8

hexadecimal system

Answer 8

has 16 digits
0-9. A-F

Question 9

binary system

Answer 9

2^7 - 2^0

Question 10

how to change decimal numbers to binary number?
eg. 132
156
29

Answer 10

long division (divide by 2)
ans: 10000100 (top to bottom)
10011100
11101

Question 11

convert decimal no. to haxadecimals
eg. 150

Answer 11

use long division (divide by 16)
ans: #96

Question 12

convert binary to decimal number
eg. convert 10001010

Answer 12

use the table of 2^7 to 2^0
ans: 138

Question 13

convert hexadecimal to decimal number
eg. 0x0B2

Answer 13

use the table 16^2 to 16^0
ans: 178