JAMB PHYSICS 2023 POSSIBLE QUESTIONS AND ANSWERS
1. Which of the following radiations cannot be deflected by a magnetic field?
A. Alpha
B. Beta
C. Gamma ✔️
D. None of them
2. Which of the following elements is the best absorber of X-rays?
A. Hydrogen
B. Oxygen
C. Calcium
D. Lead ✔️
O
3. /////////////////
|
|
0.4m |. 0.3m
—|
___________| |
M | N
| P |
|
|
∆
20N
In the above diagram, MN is perpendicular to ON and MP. What is the difference between the moment about N of the force of 20newtons applied along with MP and its moment about O?
A. Zero. ✔️
B. 0.2 N/m
C. 0.4 N/m
D. 0.8 N/m
SOLUTION
Moment about N = 20 × 0.4 =8NHm
Moment about O = 20× 0.4 = 8NHm
Difference = 8 – 8 = 0 (A)
4. Which of the following is not directly associated with direct current (D C ) ?
A. A dry cell
B. A moving coil galvanometer
C. A transformer ✔️
D. A lead accumulator
5. 0—— 3Ω ———–|
| |
| |
2Ω. 2Ω
| |
| |
0——- 4Ω ———- | fig.4
What is the resultant resistance of the circuit ( Fig. 6 ) given above?
RT = 3 + 4 + ½ + ½ = 8Ω (B)
6. Which of the following is a derived unit?
A. Kilogram
B. Metre
C. Kelvin
D. Newton ✔️
7. Number of pulley is ___________
A. Velocity ratio ✔️
B. Mechanical ratio
C. Efficiency
D. Effort
8. The thermometric substance of an absolute thermometer is ?
A. Alcohol
B. Mercury ✔️
C. Helium
D. Platinum
9. An electric cell with normal voltage E has a resistance of 3Ω connected across it. If the voltage falls to 0.6 E , the internal resistance of the cell is
A. 4 Ω
B. 3 Ω
C. 2Ω ✔️
D. 1Ω
SOLUTION
IR = I ( R + r )
I × 3 = 0.6 I ( 3 + r )
3I = 0.6 I ( 3 + r )
r = 2 Ω ( C)
10. A catapult used to hold a stone of mass 500g is extended by 20cm with an applied force F. If the stone leaves with a velocity of 40ms-¹ , the value of F is
A. 4.0 × 10⁴ N
B. 4.0 × 10³ N
C. 2.0 × 10³ N ✔️
D. 4.0 × 10² N
SOLUTION
F = ma
From. V² = u² + 2as
make Note F = m ( v² – u² ) / 2s
0.5 ( 40² – 0² ) / 2 × 0.2
F = 2000N ( C)
__
11. Na + X ——-> 20 |– + 4 |_|
∅ | 2| |e
The above represents. Na + x ———-> F + He
What particle is X in the reaction above ?
A. Beta
B. Gamma
C. Alpha
D. Neutron✔️
SOLUTION
b + 23 = 20 + 4
b = 1
a + 11 = a + 2
a = 0
X = Neutron
12. The process whereby a liquid turns spontaneously into vapor is called
A. Evaporation✔️
B. Relegation
C. Boiling
D. Sublimation
13. A 3 m³ volume of liquid W of density 200kgm-³ is mixed with another liquid L of volume 7m³ and density 150kgm-³. The density of the mixture is
A. 265kgm-³
B. 165kgm-³✔️
C. 100kgm-³
D. 350kgm-³
SOLUTION
Mass of W = density (e) × volume (v)
=. 200 × 3 = 600kg
Mass of L = density (e) × volume (v)
= 150 × 7 = 1050kg
Total Mass = 1650kg
Total volume = 3 + 7 = 10m³
Density of mixture = m / v = 1650 / 10 = 165kg/m³ (B)
14. The bond that forms a semiconductor is
A. Ionic
B. Metallic ✔️
C. Covalent
D. Electrovalent
15. Zener diode is used for
A. Current amplification
B. Power amplification
C. Voltage amplification
D. Energy conversion ✔️
16. When a pure semiconductor is heated, it’s resistance
A. Increases
B. Decreases✔️
C. Remains the same
D. Increases and then decreases
Question 15 Answer seems to be wrong
The zener diode is used in voltage amplification and regulation
Good one
Yeah good
Is it possible for all this to come out in jamb?
no
Nice one keep it up
Nice one, keep it up.
No 14 seems wrong it’s covalent
OK ma
Yes u are.right
Is there a posibility that some of the questions here can resurface in Jamb?
Yes
Will this be repeated next year ?
yes
nice
Nice, i hope it comes out
Wow
Thanks so much sir this question will really help me in my jamb this year, sir, please show me chemistry and use of English questions for this year thank you.
Sir can I get jamb chemistry physics biology and English
thanks for that.
Nice
Can i get physic pass question