Post Utme Physics Past Questions and Answers

Question 596:

A \(500 \mathrm{~kg}\) car which was initially at rest travelled with an acceleration of \(5 \mathrm{~m} / \mathrm{sec} 2\), its kinetic energy after 4 secs was ____________

A. \(\left.10^{5} \right]\)
B. \(10^{4} \mathrm{~J}\)
C. \(\left.10^{3}\right]\)
D. \(\left.10^{2} \right]\)

Question 597:

To reduce heat loss in transformer, ____________

A. The number of turns shot he increased
B. The soft iron core should be laminated
C. The area of the coils in \(t\) soft iron core should increased
D. All of the above

Question 598:

Calculate the power in operation when a force of \(10 \mathrm{~N}\) moves distance of \(5 \mathrm{~m}\) at a rate of 2secs.

A. \(25 \mathrm{~W}\)
B. \(50 \mathrm{~W}\)
C. \(5 \mathrm{~W}\)
D. \(100 \mathrm{~W}\)

Question 599:

The process of magnetizing an object of magnetic material simply by bringing a magnet near is called ____________

A. Electromagnetic induction
B. Ionic magnetization
C. Electrolyte magnetization
D. Induced

Question 600:

A heating instrument has 12 resistors and they are placed vertically and have \(a\) uniform reducing power. The powers of the first, second, third and fourth resistors are \(3000,2600,2200\), and 1800 respectively. Find the power of the resistor

A. 9500
B. 9600
C. 9700
D. \(-9600\)