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Question 1 Physics 2015 | JAMB/UTME (2015)
A
36.2cm3 
B
25.7cm3 
C
72.8cm3 
D
24.3cm3 
Explanation.
Share Answer General formular of Gas laws

(P1V1) T1= (P2V2) T2

P1 = 800mmHg, V, = 76cm3, Tr = 273 + 27 = 300k

P2 = 760mmHg, V2 = ? T2= 273 + 0 = 273 + 6 = 277k

(800 76) 300 = (760 V2) 273

V2 = (300 76 273) (300 760) = 72.8 cm3

The volume of gas as S.T.P = 72.8 cm3

Correct Option:
C
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Question 2 Physics 2015 | JAMB/UTME (2015)
A
P1V1= P2V2 
B
V1 = V2 T1T2 
C
P1T1 = P2T2 
D
P1V1 T1 = P1V1 T2 
Explanation.
Share Answer Boyles law stats that the volume of a given mass of a gas, at a constant temperature is inversely proportional to us pressure.

Mathematically

V l/p, v = k/p (where k is constant)

K = VP

Let k = k1

Then, if k = k, V and P = V1P1

V1P1 = V2P2

Correct Option:
A
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Question 4 Physics 2015 | JAMB/UTME (2015)
A
100 H 
B
0.01H 
C
10H 
D
1H 
Explanation.
Share Answer XL = WL = 2FL (w = 2f)

XL = reactance inductor (S.I unit )

L = inductance (L) in Henry

XL = 1, f = 50/, L = ?

1 = 2 50/ L

1 = 100L

i.e. 100L = 1

L = 1/100

0.01H

Inductance (L) of a inductor = 0.01H

Correct Option:
B
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Question 5 Physics 2015 | JAMB/UTME (2015)
A
Stationary 
B
In motion 
C
Dipper 
D
Ripple 
Explanation.
Share Answer Stroboscope is a scientific instrument used to make a wave appears stationary when used

Correct Option:
A
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Question 6 Physics 2015 | JAMB/UTME (2015)
A
I only 
B
I and IV only 
C
II only 
D
III only 
Explanation.
Share Answer

In an inelastic collision, linear momentum is conserved and energy is decreased

Momentum and kinetic energy are conserved in elastic collision


Correct Option:
B
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Question 7 Physics 2015 | JAMB/UTME (2015)
A
Displaces its own volume of the liquid (fluid) 
B
Displaces its own mass of the fluid 
C
Displace its own density of the fluid 
D
Is no longer subjected to gravity 
Explanation.
Share Answer Note:The principle of floatation states that a floating body displaces its own weight of the fluid or which its float.

For object to sink weight of the object (W) > upthrust of the fluid (v) i.e. w > u

(i.e. weight of the body (or object) mass of the fluid)

Correct Option:
B
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Question 8 Physics 2015 | JAMB/UTME (2015)
A
PV T = a constant 
B
PV = a constant 
C
v/t = a constant 
D
p/T = a constant 
Explanation.
Share Answer Formula for general gas law

V 1/T P

N [(PV) T] = K is constant

Correct Option:
A
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Question 9 Physics 2015 | JAMB/UTME (2015)
A
He saw a flying objects 
B
He must be thinking of water and food 
C
He was seeing the shadow of the car 
D
The sun ray from the sky were passing from a hot air (layer) to cold layer 
Explanation.
Share Answer The appearance of pool of water on road surfaces is called MIRAGE

His observation show that light from the sun ray refracted through a layer of hot air(layer) which is closed to the ground, passes from a hot air layer to the cold layer

Correct Option:
D
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