Waec Physics 2010 Past Questions and Answers

Question 41:

• WAEC 2010

In the wiring of houses, the fuse is connected to the wire coloured

A. Blue
B. Brown
C. Yellow
D. Yellow and green

Question 42:

• WAEC 2010

Which of the following factors does not affect the electric resistance of wire?

A. Length
B. Mass
C. Temperature
D. Cross-sectional area

Question 43:

• WAEC 2010

Which of the following factors will increase the sensitivity of moving coil meter?

A. Strong spring
B. Low numbers of turns
C. Small area of coil
D. Soft iron core

Question 44:

• WAEC 2010

In order to prevent bar magnets from losing their strength, they are stored wih keepers such that the two bars are placed with

A. Like poles facing each other and the keepers placed between them
B. Like poles facing each other and the keepers placed between them
C. Unlike poles facing each other and the keepers placed at their ends
D. Unlike poles facing each other and the keepers placed between them

Question 45:

• WAEC 2010

The energy, E stored in an inductor of inductance L when current I passes through it is given by the equation

A. E = \(\frac{1}{2} LI^2\)
B. E = LI²
C. E \(\frac{1}{2}LI\)
D. E = \(\frac{1}{2} L^2I\)