Physics Past Questions

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906

A cell of e.m.f 1.5V and internal resistance 2.552 is connected in series with an ammeter resistance 0.50 and a load of resistance 7.00. Calculate the current in the circuit

A. 0.15A
B. 0.20A
C. 2.1OA
D. 3.00A
E. 6.67A

View Answer & Discuss (3) WAEC 1995

907

Which of the following statements are not true of a moving-coil milliammeter? I. It can be used to measure alternating current II. It has a linear scale III. It can be adapted to read higher values of currents IV. A resistor connected in parallel with the milliammeter would convert it to a voltmeter

A. I and IV only
B. II and III only
C. III and IV only
D. I, II and III only
E. I, III and IV only

View Answer & Discuss (6) WAEC 1995

908

A radioactive nuclide of mass 6.09 has a half-life of 8 days. Calculate the time during which 5.25g of the nuclide would have decayed

A. 1 day
B. 2 days
C. 8 days
D. 24 days
E. 42 days.

View Answer & Discuss (13) WAEC 1995

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909

A moving-coil meter with an internal resistance of 100 Ω has a full-scale deflection when a current of 10 mA flows through it. What value of resistance would convert it to read 10 V at full-scale deflection?