1) We have two waves one at $f=1000 Hz$ and another at $g=3000 Hz$.
find the beat frequencies ?
A. $1000 Hz$ and $4000 Hz$
B. $2000 Hz$ and $3000 Hz$
C. $1000 Hz$ and $3000 Hz$
D. $2000 Hz$ and $4000 Hz$
2) Find the energy contained in photon of light the wavelength is $720 nm $
A. $1,2.10^{-19}j$
B. $2,1.10^{-19}j$
C. $2,75.10^{-18}j$
D. $2,75.10^{-19}j$
3)We have an inductor $20.0 mH$ ,
Find the value of inductive reactance at frequency of $10kHz$?
A.$ 1256.64 ohms$
B.$ 6.2832 ohms$
C.$ 628.32 ohms$
D.$ 789.56 ohms$
4)One wire carrying $100 mA$ ,find the flux density of magnetic field in tesla at distance of $10 cm$ from this wire ?
A. $10^{-10}T$
B. $2.10^{-7}T$
C. $2,4.10^{-7}T$
D. $7.10^{-6}T$
Answer key :
1.D
2.C
3.A
4.B
It's interesting that many of the bloggers your tips helped to clarify a few things for me as well as giving.. very specific nice content. And tell people specific ways to live their lives.Sometimes you just have to yell at people and give them a good shake to get your point across.
ReplyDeleteLogistics Software