Courses » JAMB » JAMB Physics » Physics Exam Topics » 2023 - Questions and Answers

2023 - JAMB Physics Past Questions and Answers - page 2

11

 

An open-tube mercury manometer is used to measure the pressure in a gas tank. When the atmospheric pressure is 101,325 \(P_a\), what is the absolute pressure in \(P_a\) in the tank if the height of the mercury in the open tube is 25 cm higher

A

108,986 Pa

B

165,238 Pa

C

122,364 Pa

D

134,645 Pa

Ask EduPadi AI for a Detailed Answer
12

 

What is the name of the model of the atom that describes electrons as orbiting the nucleus in specific energy levels?

A

Bohr model

B

Dalton model

C

Rutherford model

D

Thomson model

Ask EduPadi AI for a Detailed Answer
13

 

A missile is launched with a speed of 75 ms-1 at an angle of 22° above the surface of a warship. Find the horizontal range achieved by the missile. Ignore the effects of air resistance.

[Take g = 10 ms-1]

A

195

B

271 m

C

391 m

D

136 m

Ask EduPadi AI for a Detailed Answer
14

 

Which of the following liquids has the highest surface tension?

A

Soapy water

B

Water

C

Mercury

D

Oil

Ask EduPadi AI for a Detailed Answer
15

 

A parallel plate capacitor separated by an air gap is made of \(0.8m^2\) tin plates and 20 mm apart. It is connected to 120 V battery. What is the charge on each plate?

Take \(ε_o\) = \(8.85×10^-12 Fm^-1\)

A

3.54nC

B

42.5nC

C

35.4nC

D

4.25nC

Ask EduPadi AI for a Detailed Answer
16

 

Rainbow formation is as a result of the combination of which of the following phenomena?
(i) Reflection
(ii) Dispersion
(iii) Total internal reflection
(iv) Refraction

A

(ii) and (iv) only

B

(i), (iii) and (iv) only

C

(i), (ii) and (iv) only

D

(ii), (iii) and (iv) only

Ask EduPadi AI for a Detailed Answer
17

 

The surface temperature of a swimming pool on a warm day is 25oC and the temperature at the bottom is 15oC. If the swimming pool has a surface area of 620 m2 and a depth of 1.5m. Find the rate at which energy is transferred by conduction from the surface to the bottom of the swimming pool.

[Thermal conductivity of water (k) = 0.6071 Wm-1K-1]
 

A

2.5kw

B

250kw

C

300kw

D

3.0kw

Ask EduPadi AI for a Detailed Answer
18

 

A step-down transformer is used on a 2.2 kV line to deliver 110 V. How many turns are on the primary windings if the secondary has 25 turns?

A

20

B

250

C

200

D

500

Ask EduPadi AI for a Detailed Answer
19

 

Which of the following materials is a good insulator?

A

Silver

B

Water

C

Rubber

D

Copper

Ask EduPadi AI for a Detailed Answer
20

The property of wave shown in the diagram above is?
 

A
Diffraction
B
Refraction
C
Polarisation
D
Interference
Ask EduPadi AI for a Detailed Answer
Please share this, thanks: