Related Questions

Given that, 24 carat gold is pure gold, 18 carat gold is 3/4th of pure gold and 20 carat gold is 5/6th of pure gold, the ratio of the pure gold in 18 carat gold to the pure gold in 20 carat gold is -
A 5 : 8
B 10 : 9
C 8 : 5
D 9 : 10
At __________ frequencies the parallel R-L circuit behaves as purely resistive.
A Low
B Very low
C High
D Very high
In an RL circuit, part of the power is resistive and part is reactive.
A True
B False
In a rare coin collection, all coins are either pure gold or pure silver , and there is initially one gold coin for every three silver coins . With the addition of 10 more gold coins to the collection, the ratio of gold coins to silver coins is 1 to 2. Based on this information , how many total coins are there now in this collection (after the acquisition)?
A 40
B 50
C 70
D 90
Which of the following resistive materials has the lowest temperature co-efficient of resistance ?
A Nichrome
B Constantan
C Kanthal
D Molybdenum
In deriving ac equivalent circuit for an amplifier circuit we short circuit
A All resistors
B All transistors
C All inductors
D All capacitors
Pure inductive circuit takes power from the A.C. line when
A Applied voltage decreases but current increases
B Applied voltage increases but current decreases
C Both applied voltage and current increase
D Both applied voltage and current decrease
Pure inductive circuit
A Consumes some power on average
B Does not take power at all from a line
C Takes power from the line during some part of the cycle and then returns back to it during other part of the cycle
D None of the above
In a pure inductive circuit
A The current is in phase with the voltage
B The current lags behind the voltage by 90°
C The current leads the voltage by 90°
D The current can lead or lag by 90°
Which circuit element(s) will oppose the change in circuit current?
A Resistance only
B Inductance only
C Capacitance only
D Inductance and capacitance

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