1991 - JAMB Physics Past Questions and Answers - page 5
41
A
1\(\frac{1}{4}\) days
B
8\(\frac{1}{4}\) days
C
30 days
D
80 days
correct option: c
Users' Answers & Comments42
In a nuclear fusion process, four protons each of mass Mp were fused to produce a nucleus X of mass Mx. Which of the following equations is CORRECT?
A
4Mp > Mx
B
4Mp = Mx
C
4Mp < Mx
D
Mp > Mx
43
Which of the following are True for \(\alpha\)-decay. i. mass number, decrease by four. ii. Atomic number decreases by two. iii. mass number does not change.
A
i and ii only
B
ii and iii only
C
i and iii only
D
i, ii, and iii only
correct option: a
Users' Answers & Comments44
Which of the following phenomena is called photoelectric effect?
A
high energy electrons impinge on a metalic anode which then emits photons
B
a high energy photon emits photons as it slowed down
C
a metal absorbs quanta of light and then emits electrons
D
Two electrons are created from a quantum of light
correct option: c
Users' Answers & Comments45
Find the tension T1 in the diagram above if the system is in equilibrium
[G = 10ms-2]
[G = 10ms-2]
A
200/√3N
B
100/√3N
C
300/√3N
D
100N
correct option: b
Users' Answers & Comments46
A
36π J
B
72π J
C
144π J
D
288π J
correct option: b
Users' Answers & Comments47
A
0.80A
B
0.50A
C
0.40A
D
0.004A
correct option: c
Users' Answers & Comments48
A
8.0µF
B
6.0µF
C
4.0µF
D
2.0µF
correct option: d
Users' Answers & Comments49
A
K is Opened
B
K is closed
C
the 14 ohm resistor is doubled with k closed
D
the 6 ohm resistor is doubled with k closed
correct option: b
Users' Answers & Comments