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
Friday, 14 October 2011
Friday, 7 October 2011
MCAT Physics equations list ( Formulas )
Motion, work, power and energy
$ v=d/t $
v : velocity
d : distance
t : time
$a=\Delta v/\Delta t$
a : acceleration
$\Delta v$ : change in velocity
$\Delta t$ : change in time
$P=m.v$
$P$ : momentum
$m$ : mass
$v$ : velocity
$w=F.d$
$ w$ : work
$ F$ : force
$d $ : distance
Electricity
$V=I.R$
$V$ : Potential difference
$I$ : current
$R$ : resistance
$ P=I.V$
$P$ : Power
$I$ : Current
$V$ : Potential difference
$P=V^{2}/R$
$P$ : Power
$V$ : Potential difference
$R$ : resistance
$P=I^{2}.R$
$P$ : Power
$I$ : Current
$R$ : resistance
$ v=d/t $
v : velocity
d : distance
t : time
$a=\Delta v/\Delta t$
a : acceleration
$\Delta v$ : change in velocity
$\Delta t$ : change in time
$P=m.v$
$P$ : momentum
$m$ : mass
$v$ : velocity
$w=F.d$
$ w$ : work
$ F$ : force
$d $ : distance
Electricity
$V=I.R$
$V$ : Potential difference
$I$ : current
$R$ : resistance
$ P=I.V$
$P$ : Power
$I$ : Current
$V$ : Potential difference
$P=V^{2}/R$
$P$ : Power
$V$ : Potential difference
$R$ : resistance
$P=I^{2}.R$
$P$ : Power
$I$ : Current
$R$ : resistance
Monday, 3 October 2011
SAT Physics Practice Questions 3 & answer key
1)An object is traveling along straight line with speed of 100 m/s, after 10 second the speed of this object is 200 m/s.
find the average acceleration?
A. $10 m/s^{2}$
B. $20 m/s^{2}$
C. $1 m/s^{2}$
D. $2 m/s^{2}$
2) One ball makes a rotation around circle of radius 2 m ,with speed of 10 m/s,
find the frequency of motion in revolutions per second ?
A. 0.33
B. 0.48
C. 0.79
D. 0.88
3)One ball is projected upward with angle of 30 degree ,and initial speed of 50 m/s,
find the time when the ball will be at the top of trajectory?
A. 5 s
B.10 s
C.15 s
D.25 s
4)We add 30 J of heat to a gas in a container ,and this gas does 10 J of work,
find the internal energy ?
A.10 J
B.20 J
C.30 J
D.-20 J
Answer key:
1.A
3.A
2.C
4.D
find the average acceleration?
A. $10 m/s^{2}$
B. $20 m/s^{2}$
C. $1 m/s^{2}$
D. $2 m/s^{2}$
2) One ball makes a rotation around circle of radius 2 m ,with speed of 10 m/s,
find the frequency of motion in revolutions per second ?
A. 0.33
B. 0.48
C. 0.79
D. 0.88
3)One ball is projected upward with angle of 30 degree ,and initial speed of 50 m/s,
find the time when the ball will be at the top of trajectory?
A. 5 s
B.10 s
C.15 s
D.25 s
4)We add 30 J of heat to a gas in a container ,and this gas does 10 J of work,
find the internal energy ?
A.10 J
B.20 J
C.30 J
D.-20 J
Answer key:
1.A
3.A
2.C
4.D
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