
alternating current

Quiz
•
Physics
•
12th Grade
•
Medium
Sahana R
Used 1+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
A resistor is connected to an AC power supply. On this circuit, the current
leads the voltage by 90°.
lags the voltage by 90°.
is in phase with the voltage.
none of the given answers
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
The electricity in our house is
AC
DC
BC
AD
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
If an electric bulb is connected to an AC source, which of the following statement is true about the phase difference between the voltage across the bulb and current flowing in it?
In phase.
Not in phase.
The voltage is leading the current.
The current is leading the voltage.
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Which of the following general equations represent AC current
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Which is the correct equation of
?
6.
MULTIPLE CHOICE QUESTION
5 mins • 2 pts
A bulb is connected first with dc and then ac of same voltage then it will shine brightly with
a.c
d.c
Brightness will be in ratio 1/(1.4).
Equally with both.
7.
MULTIPLE CHOICE QUESTION
5 mins • 2 pts
The variation of the instantaneous current (I) and the instantaneous emf (ε) in a circuit is as shown in the figure. Which of the following statements is correct?
The voltage lags behind the current by π/2.
The voltage leads the current by π/2
The voltage and the current are in phase.
The voltage leads the current by π.
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