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JAMB Physics 2015 Paper
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© africaexams.com
Question : 52
Total: 66
The r.m.s value of a supply voltage is quoted at 200v. What is the approximate peak value of the voltage?
200volts
300volts
283volts
250volts
Validate
Solution:
V
r.m.s
= V
0
÷ V
2
, where V
r.m.s
rep. to as voltage root –square mean, v = peak voltage
V
r.m.s
= 200volt, v = ?
200 = V
0
÷ V
2
V
0
= 200
v2
= 200 × 1.414
= 282.8 volts V0 = b &approx.; 283 volts
© africaexams.com
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