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2986

The function of a 5-A fuse included in a circuit supplying a household refrigerator with power is to keep the

A. Temperature of the refrigerator low and constant
B. keep current supplied to the refrigerator below 5A
C. Voltage supply constant
D. Current supplies to the refrigeration

View Answer & Discuss (3) JAMB 1989

2987

When a box of mass 45kg, is given an initial speed of 5ms^-1 it slides along a horizontal floor a distance of 3m before coming to a rest. what is the coefficient of kinetic friction between the box and the floor? (G = 10ms^-2)

A. \( \frac{5}{6} \)
B. \( \frac{5}{12} \)
C. \( \frac{1}{3} \)
D. \( \frac{2}{3} \)

View Answer & Discuss (23) JAMB 1986

2988

A simple pendulum, 0.6m long, has a period of 1.5s. What is the period of a similar pendulum of 0.4m length in the same location?

A. \( 1.5 \frac{ \sqrt{2}}{3} \)s
B. \( 1.5 \frac{ \sqrt{3}}{2} \)s
C. 2.25s
D. 1.00s
E. 2.00s

View Answer & Discuss (10) JAMB 1984

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2989

Which of the following may be used to determine the relative humidity in a physics laboratory

I. Manometer
II. Wet-and-Dry Bulb Hygrometer
III. Hair Hygrometer
IV. A Hydrometer