Alternating Current Test

Result

Alternating Current Test - 26

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Weekly Quiz Competition

Question 1
4 / -1

A
between 1 and 2

B
2

C

D

Solution
Question 2
4 / -1

An AC voltage source has an output of ∆V = (200V) sin 2πft. This source is connected to a 100 Ω resistor. The (μC) current in the resistance is

A
1.41 A

B
2.41 A

C
3.41 A

D
0.71 A

Solution
Question 3
4 / -1

What is the charge stored by 11μ F as shown in the figure?

A
2.33 μC

B
3.33 μC

C
1.33 μC

D
4.33 μC

Solution
Question 4
4 / -1

220 V, 50 Hz AC is applied to a resistor. The instantaneous value of voltage is

A

B

C

D

Solution
Question 5
4 / -1

An L-C circuit contains a 20 mH inductor and a 50 μF capacitor with an initial charge of 10 mC. The resistance of the circuit is negligible. Let the instant the circuit is closed be t = 0. At what time is the energy stored completely magnetic?

A
t = 0

B
t = 1.57 ms

C
t = 3.14 ms

D
t = 6.28 ms

Solution
Question 6
4 / -1

In a series resonant circuit, the AC voltage across resistance R, inductor L and capacitor C are 5 V, 10 V and 10 V respectively. The AC voltage applied to the circuit will be

A
10 V

B
25 V

C
5 V

D
20 V

Solution
Question 7
4 / -1

What is the average power dissipation in an ideal capacitor in AC circuit?

A
2CV²

B
1/2 CV²

C
Zero

D
CV²

Solution
Question 8
4 / -1

Find the time required for a 50 Hz alternating current to become its value from zero to the rms value

A
10.0 ms

B
2.5 ms

C
15.0 ms

D
5.0 ms

Solution
Question 9
4 / -1

What is the value of inductance L for which the current is a maximum in a series L-C-R circuit with C =10 μF and co=1000s^-1?

A
100 mH

B
1 mH

C
Cannot be calculated unless R is known

D
10 mH

Solution
Question 10
4 / -1

The value of alternating emf E in the given circuit will be

A
220 V

B
140 V

C
100 V

D
20 V

Solution