Post Utme Physics Past Questions and Answers

Question 836:

A galvanometer of internal resistance \(50 \Omega\) has a full-scale deflection for a current of \(5 \mathrm{~mA}\). What is the resistance required to convert it to a voltmeter with full scale deflection of \(10 \mathrm{~V}\) ?

A. \(1750 \Omega\)
B. \(1950 \Omega\)
C. \(2000 \Omega\)
D. \(2500 \Omega\)

Question 837:

The cost of running five \(60 \mathrm{~W}\) lamps and four \(100 \mathrm{~W}\) lamps for 20 hours if electrical energy costs \(\mathrm{N} 10.00\) per KWh is ____________

A. N 280.00
B. N160.00
C. N120.00
D. N 140.00

Question 838:

From the generating station to each substation, power is transmitted at a very high voltage so as to reduce ____________

A. Eddy current loss
B. Hysteresis loss
C. Heating in the coll
D. Magnetic flux leakage

Question 839:

The relationship between the length( \(L\) of air column in a pipe open at one end and the wavelength \((\lambda)\) of the standing wave at the first overtone is ____________

A. \(2 \mathrm{~L}=\lambda\)
B. \(L=\lambda\)
C. \(L=3 \lambda\)
D. \(4 \mathrm{~L}=3 \lambda\)

Question 840:

If the angle of declination in a place is \(10^{\circ} \mathrm{E}\), calculate the true geographic bearing if the compass reads \(N 40^{\circ} \mathrm{E}\).

A. \(\mathrm{N} 50^{\circ} \mathrm{E}\)
B. \(N 40^{\circ} \mathrm{E}\)
C. \(\mathrm{N} 30^{\circ} \mathrm{E}\)
D. \(\mathrm{N} 25^{\circ} \mathrm{E}\)