Post Utme Physics Past Questions and Answers

Question 1:

1 farad is equivalent to ____________

A. 1 coulomb/volt
B. 1 volt/coulomb
C. 1 joules/coulomb
D. 1 ampere/sec
E. Volts per unit charge

Question 2:

A \(0-10 \mathrm{~mA}\) galvanometer with a coil resistance of \(30 \mathrm{ohm}\) can be converted to a 0-10A ammeter by using

A. \(0.030 h m\) series resistor
B. 9.99ohm shunt resistor
C. \(0.030 h m\) shunt resistor
D. \(9.99 \mathrm{ohm}\) series resistor

Question 3:

A battery has an internal resistance of 4 and an emf of \(12 \mathrm{~V}\). The terminal voltage when a load of \(20 \Omega\) is connected across it is ____________

A. 4
B. \(10 \mathrm{~V}\)
C. \(20 \mathrm{~V}\)
D. \(2 \mathrm{~V}\)

Question 4:

A conducting sphere has a net charge of \(4.810^{17} \mathrm{C}\). What is the approximate number of excess electrons on the sphere if the fundamental natural charge is \(-1.6 \times 10^{-1 y} C\) ?

A. 100
B. 300
C. 200
D. 400

Question 5:

A magnet cannot be demagnetized by ____________

A. Heating
B. Hammering
C. Chemical treatment
D. The use of solenoid through which an alternating current is flowing