Alternating And Main Voltage Question Preview (ID: 50499)


From Small Alternator Of The Dynamo Of Bicycle To Huge Alternators Of (EDL) Supply Alternating Current , In This Game We Are Going To Study The Properties Of AC. TEACHERS: click here for quick copy question ID numbers.

The wave form of DC voltage on oscilloscope is
a) Alternating sinusoidal
b) Alternating Wave of dynamo
c) Alternating Triangular
d) Straight line

The voltmeter measures :
a) Maximum voltage
b) Maximum current
c) Effective current
d) Effective voltage

The voltage supplied by the mains of EDL characterized by :
a) Only alternating sinusoidal of maximum voltage 310 V
b) Only has 50 Hz
c) Only Alternating voltage of effective voltage 220 V
d) All choices

The unit of current is :
a) Voltage ( V )
b) Hertz ( Hz )
c) Ampere ( A )
d) Second ( sec )

Period ( T ) can be determined by Law T = Vb x where x is
a) The number of units in the amplitude ( y – units )
b) The number of units between two crests
c) The number of units in one crest
d) All choices

Effective voltage is determined by the following law :
a) Ueff = I/T
b) U eff = Sv x Y
c) U eff = Umax/√2
d) None of the choices

Tension is:
a) Proportional to the elongation of the spring
b) Inversely proportional to the elongational
c) Equals to the mass of body
d) None of the choices

The horizontal sensitivity ( Time base ) is used to determine
a) Maximum voltage
b) period
c) voltage
d) current

The voltage that cause electrocution leading to death is :
a) 25 V in dry places
b) Current less than 100 mA
c) 25 V in wet places and 50 V in dry places
d) All choices

The screw driver glows when tests :
a) Neutral line
b) Ground line
c) Live line
d) All choices

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