Question

No 13, 14 pake penjelasanya

Answer 1

13. )
langsung saja yah kak ^_^

1/f = 1 / 5 - 1/0,5 ======>>( 50 cm = 0,5 m )
1/f = - 9/5
f = -5/9

kekuatan lensa = 1/f
=> 1/(-5/9)
=> -9/5
=> -1,8 Dioptri


14.)
Dik :
R1 = 2 Ohm
R2 = 6 Ohm
R3 = 3 Ohm
V = 12 Volt
Rtotal = 2 Ohm + ( 2 ohm ) = 4 Ohm

dit :
P2

jawab :
================ Arus yang mengalir di R2 ================
Arus total = V / Rt
It = 12 / 4
It = 3 Ampere

Arus di R2
( 6 / 9 ). 3
I2 = 2 Ampere

==============Tegangan di R2=============
V2 = ( 2 / 4 ) . 12
V2 = 6 Volt

=============Daya di R2===============
P2 = I2. V2
P2 = 2. 6
P2 = 12 Watt