OAU Physics 2007/2007 Past Questions

A 70kg man ascends a flight of stairs of height 4m in 7s. The power expended by the man is:

A body accelerates uniformly from rest at 6ms^-2 for 8 seconds and then decelerates uniformly to rest in the next 5 seconds. The magnitude of the deceleration is:

A nail is pulled from a wall with a string tied to the nail. If the string is inclined at an angle of 30° to the wall and the tension in the string is 50N, the effective force used in pulling the nail is:

If M and R are the mass and radius of the earth respectively and G is the universal gravitational constant, the earth's gravitation potential at an altitude H above the ground level is:

Which of the following statements is not true?

The ice and steam points of a thermometer are 20mm and 100mm respectively: A temperature of 75°C corresponds to Ymm on the thermometer. What is Y?

An electric kettle with negligible heat capacity is rated at 2000W, if 2.0Kg of water is put in it, how long will take temperature of water to rise from 20° to 100°? [specific heat capacity of water = 4200JKg9.6ms^-1K^-1]

A quantity of ice -10°C is heated until the temperature of the heating vessel is 90°C. Which of the following constants NOT required to determine the quantity of heat supplied to the vessel?

The scent from a jar of perfume opened moves through the air molecules by

In the diagram above, P, Q and R are vectors. Which of the options gives the correct relationship between the vectors?

A convex lens of focal length 10.0cm is used to form a real image which is half the size of the object. How far from the object is the image?

A diverging lens of focal length 20cm forms an image halve of the size of the object. What is the object distance?

An object of height 3.00cm is placed 10cm in front of a biconvex lens of focal length 15cm, the image of the object is

The most suitable type of mirror used for the construction of a search light is the:

Light waves and ripples of water are similar because both

Three 4Ω resistors were connected in series by 'Tola while Ade connected the same set of resistors in parallel. The ratio of the value obtained by Ade to that obtained by 'Tola is:

Three resistors are connected as shown in the diagram below. The equivalent resistance between points X and Y is

A coil of copper wire of N turns is kept rotating between the poles of a permanent magnet such that the magnetic flux linking the coil changes continuously. Which of the following statements is TRUE?

What is the equivalent capacitance between points A and B in the diagram below?

The principle of operation of an induction coil is based on

The equation ¹⁵⁰₆₂X → ¹⁵⁰₆₃Y + K, represents

Which of the following radiations cannot be deflected by an electric field or magnetic field? (i) a - rays, (ii) β - rays (iii) γ - rays (iv) X - ray

The half-life of a radioactive element is 9 days. What fraction of atoms has decayed in 36 days .