Alternating Current Test

Result

Alternating Current Test - 56

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Weekly Quiz Competition

Question 1
4 / -1

An ac source of variable frequency f is connected to an LCR series circuit. Which of the graphs in figure represents the variation of current I in the circuit with frequency f

A

B

C

D

Solution
Question 2
4 / -1

The r.m.s. voltage of the wave form shown is

A
10 V

B
7 V

C
6.37 V

D
None of these

Solution
Question 3
4 / -1

A constant voltage at difference frequencies is applied across a capacitance C as shown in the figure. Which of the following graphs correctly depicts the variation of current with frequency

A

B

C

D

Solution
Question 4
4 / -1

The output current versus time curve of a rectifier is shown in the figure. The average value of output current in this case is

A
0

B

C

D

Solution
Question 5
4 / -1

The current \'i\' in an inductance coil varies with time \'t\' according to following graph
Which of the following plots shows the variation of voltage in the coil

A

B

C

D

Solution
Question 6
4 / -1

Two sinusoidal voltages of the same frequency are shown in the diagram. What is the frequency, and the phase relationship between the voltages

A
(a)

B
(b)

C
(c)

D
(d)

Solution
Question 7
4 / -1

The voltage across a pure inductor is represented by thefollowing diagram. Which of the following diagramswill represent the current

A

B

C

D
Question 8
4 / -1

In pure inductive circuit, the curves between frequency f and reciprocal of inductive reactance 1 /X_L is

A

B

C

D

Solution
Question 9
4 / -1

The current i in the circuit shown here varies with time t is

A

B

C

D
Question 10
4 / -1

The resonance point in X_L – f and X_C – f curves is

A
P

B
Q

C
R

D
S

Solution