Post Utme Obafemi Awolowo University Physics Past Questions and Answers

Question 1:

A capacitor of $2.0\times {10}^{-11F}$ and an inductor are joined in series. The value of the inductance that will give the circuit a resonant frequency of $200kHz$ is ____________

A. $\frac{1}{16}H$
B. $\frac{1}{8}H$
C. $\frac{1}{64}H$
D. $\frac{1}{32}H$

Question 2:

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

A. 40 W
B. 100 W
C. 280 W
D. 400 W

Question 3:

A body accelerates uniformly from rest at $6m{s}^{-2}$ for $8sec-$ onds and then decelerates uniformly to rest in the next 5 seconds. The magnitude of the deceleration is ____________

A. $9.6m{s}^{-2}$
B. $48m{s}^{-2}$
C. $24.0m{s}^{-2}$
D. $39.2m{s}^{-2}$

Question 4:

A nail is pulled from a wall with a string tied to the nail. If the string is inclined at an angle of ${30}^{\circ }$ to the wall and the tension in the string is $50N$, the effective force used in pulling the nail is ____________

A. 25 N
B. $25\sqrt{3}N$
C. 50 N
D. $50\sqrt{3}N$

Question 5:

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 ____________

A. $-\frac{GM}{H}$
B. $-\frac{GM}{(R+H)}$
C. $-\frac{GM}{2H}$
D. $-\frac{GM}{(R-H)}$