Physics Past Questions and Answers

A simple magnifying glass is used to view an object. At what distance from the lens must the object be placed so that an image 5 times the size of the object is produced 20cm from the lens?

A 2cm
B 4cm
C 15cm
D 25cm
E 100cm

Question 377:

The inability of the eye to focus near objects is known as

A Long sight
B Astigmatism
C Presbyopia
D Glaucoma
E Short sight

Question 378:

Which of the following are transverse waves? I. Ripples on water II. Sound waves in air III. Light waves from the sun

A II only
B I and II only
C II and III only
D I and II only
E I, II and III

Question 379:

Which of the following has the shortest wavelength?

A Infrared rays
B Gamma rays
C Ultra violet rays
D Radio waves
E Visible light

Question 380:

The electrical energy supplied by a Leclanche cell is obtained from the

A Nuclear energy
B Magnetic energy
C Solar energy
D Chemical energy
E Mechanical energy