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# Physics Study Centre for JAMB, WAEC and NECO

Physics is the branch of science concerned with the nature and properties of matter and energy. The subject matter of physics includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms. This study centre is designed to help you become a better physics student.

## Past Questions (400) - Page 1

### Question 1

Two magnets are used to magnetize a soft iron bar PQ as illustrated in the diagram given. The correct polarity at P and Q respectively

Exam Body: WAEC

### Question 2

In storing magnets, keepers are used to

Exam Body: WAEC

### Question 3

A $$10\mu \mathrm{C}$$ charge moves with a velocity of $$1.0 \times 10^5 ms^{-1}$$ at right angle to a uniform magnetic field of flux density $$5.0 \times 10^{-4}T.$$ Calculate the force on the charge.

Exam Body: WAEC

### Question 4

Which of the following statements is not correct about steel and soft iron?

Exam Body: WAEC

### Question 5

What determines the polarity at the ends of an electromagnet? The

Exam Body: WAEC

### Question 6

How many beta particle(s) are emitted in the radioactive decay of $$^{198}_{79} \mathrm{Au} \leftarrow ^{198}_{80} \mathrm{Hg}$$?

Exam Body: WAEC

### Question 7

The phenomenon by which two light atomic nuclear combine to form a heavy nuclide with the release of energy is known as

Exam Body: WAEC

### Question 8

In a p-type semiconductor, the

Exam Body: WAEC

### Question 9

Let Δx be the uncertainty in the measurements of position and Δp the uncertainty in measurement of momentum. The uncertainty principle relation is given as

Exam Body: WAEC

### Question 10

Two objects of masses 80kg and 50kg are separated by a distance of 0.2m. If the gravitational constant is 6.6 x 10-11Nm kg, calculate the gravitational attraction between them.

Exam Body: WAEC

### Question 11

1kg of boiling water at 100°C is poured into an aluminium hot water bottle at 16°C. The temperature of the water quickly falls to 96°C. Assuming that there is no loss of heat, the mass of the bottle is

Exam Body: JAMB

### Question 12

The resultant of two forces is 50N. If the forces are perpendicular to each other and one of them makes an angle of 30° with the resultant, find its magnitude

Exam Body: JAMB

### Question 13

Two capacitors C1 and C2 are connected as shown in the diagram. The capacitance C2 is twice C1 when the key is opened the energy stored up in C1 is W. If the key is later closed and the system is allowed to attain electrical equilibrium, the total energy stored in the system will be

Exam Body: WAEC

### Question 14

In which of the points labelled A, B, C, D and E on the conductor shown would electric charge tend to concentrate most?

Exam Body: WAEC

### Question 15

Which of the following is stored by dry Leclanche cell?

Exam Body: WAEC

### Question 16

When a brick is taken from the earth's surface to the moon, its mass

Exam Body: JAMB

### Question 17

The pair if physical quantities that are scalar only are

Exam Body: JAMB

### Question 18

A simple pendulum of length 0.4m has a period 2s. What is the period of a similar pendulum of length 0.8m at the same place?

Exam Body: JAMB

### Question 19

Using the data in the circuit illustrated above, calculate the value of R

Exam Body: WAEC

### Question 20

A 90W immersion heater is used to supply energy for 5 minutes. The energy supplied is used to completely melt 160g of a solid at its melting point. Calculate the specific latent heat of the solid.

Exam Body: WAEC