Waec Physics 2015 Past Questions and Answers

Question 41:

• WAEC 2015

A wire of cross-sectional area 0.60mm² has a restivity of 7.2 x 10^-7 \(\Omega\). Calculate the length of wire that will have a resistance of 3\(\Omega\).

A. 0.25m
B. 2.50m
C. 3.60m
D. 36.00

Question 42:

• WAEC 2015

A battery of emf 24V is connected to three resistor P, Q and R as illustrated in the given diagram. Determine the voltage across the resistor Q.

A. 5V
B. 10V
C. 14V
D. 24V

Question 43:

• WAEC 2015

The mass of the earth is 6.0 x 10²⁴kg and that of the moon is 7.0 x 10²²kg. If the distance between them is 4.0 x 10⁸m, calculate the force of attraction between them. [G = 6.7 x 10^-11Nm²kg^-2]

A. 1.8 x 10⁵N
B. 1.8 x 10¹⁰N
C. 1.8 x 10¹⁵N
D. 1.8 x 10²⁰N

Question 44:

• WAEC 2015

The angle which the direction of the earth magnetic field makes with the horizontal at a palace is know as.

A. Angle of contact
B. Angle of dip
C. Angle of declination
D. Magnetic meridian

Question 45:

• WAEC 2015

What must be connected between the points P and Q to establish a steady current through the incomplete circuit diagram given?

A. Fuse
B. Ammeter
C. Cell
D. Voltmeter