Physics Questions and Answers
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
18.0V
12.0V
16.0V
20.0V
Correct answer is D
ε = 24.0 V, r=1Ω, R=5.0Ω
terminal p·d = ?
ε = IR+Ir = I(R+r)
⇒ IR+Ir = I(R+r)
⇒ I = \(\frac{24}{5+1}\)
⇒ I =\(\frac{24}{6}\)
⇒ I = 4 A
terminal p·d = 4 × 5
terminal p·d = 20.0 V
422.7
220.14
464.53
321.74
Correct answer is A
h=32·8m, p= \(1×10^3kgm^-3\)
g=9·8 \(ms^-2\) , \(P_a\)=101·3KPa
\(P_T\)= ?
P=hpg
⇒\(32·8×1×10^3 × 9·8\)=321440 \(P_a\)
⇒321·44KPa
⇒ \(P_T\) =321.44+101.3
;\(P_T\)=422·7KPa
70
62
80
42
Correct answer is A
Relative Humidity= \(\frac {partial pressure of H2O}{saturated vapor pressure of H2O}\)×100%
S.v.p. of water at 40°c = 55.3
⇒ Relative Humidity= \(\frac{38.8}{55.3}\)×100%
Relative Humidity= 70%
195 m
271 m
391 m
136 m
Correct answer is C
U= 75 \(ms^-1\) =22º, g= 10 \(ms^-2\) , R=?
R= \(\frac{U^2sin2\theta}{g}\)
⇒R= \(\frac{75^2×sin2(22)}{10}\)
⇒R= \(\frac{5625×Sin44}{10}\)
⇒R= \(\frac{5625×0.6947}{10}\)
⇒R= \(\frac{3907.69}{10}\)
⇒ 391m
\(T_1\) = 2864 N, \(T_2\)= 3612 N
\(T_1\)= 3612 N, \(T_2\) = 2864 N
\(T_1\)= 3502 N, \(T_2\)= 2760 N
\(T_1\) = 2760 N, \(T_2\) = 3502 N
Correct answer is C
W = mg = 220 x 9.8 = 2156 N
⇒Sin 38º = \(\frac{2156}{T_1}\)
⇒ \(T_1\) = \(\frac{2156}{Sin 38}\)
⇒ \(T_1\) = 3502 N
Cos 38º = \(\frac{T_2}{T_1}\)
⇒ \(T_2\) = 3502 x Cos 38º
⇒ \(T_2\) = 2760 N
; \(T_1\) = 3502 N, \(T_2\) = 2760 N.