MCQ Resonance in LCR Circuit, Class 12 Physics

1. There will be total 10 MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying.

1. A pure resistance R, pure capacitance C and pure inductance L are connected in series and the impedance of the circuit at resonance is Z₀. If they are connected in parallel to each other, the maximum impedance at resonance will be:

Less than R

dependent on the values of C and L

Equal to Z₀

More than R

Question 1 of 10

2. At resonance the impedance of RLC circuit is

A

B

C

D

Question 2 of 10

3. Ratio is equal to

C

L

R

Q

Question 3 of 10

4. When the oscillations produced are of constant amplitude. The are called

Damped oscillation

Balanced oscillation

Undamped oscillation

Unbalanced oscillation

Question 4 of 10

5. Find the series resonance frequency when L = 0.09 H, C = 25 F

10.6 s^-1

0.106 s^-1

1.66 s^-1

1.06 s^-1

Question 5 of 10

6. Measure of sharpness in an ac circuit is given by

Power ratio

Quality factor

Power factor

Quality ratio

Question 6 of 10

7. In a series RCL circuit at resonance the applied ac voltage is 220 V. The potential drop across the inductance is 110V, what is the potential drop across the capacitor?

220 V

220 √2 V

110 √2 V

110 V

Question 7 of 10

8. Acceptor circuit is

When a series resonance circuit admits maximum current through it

When a series resonance circuit admits minimum current through it

When a series resonance circuit admits no current through it

Both b and c

Question 8 of 10

9. An ac circuit contains a resistance R, capacitance C and inductance L in series with a source of emf ε = ε₀sin (ωt - Ø). The current through the circuit is maximum when:

ω = RLC

R = L = C

ω2 = LC

ωL = 1/ωC

Question 9 of 10

10. Resonant circuits are used in tuning of

A radio

A TV set

Both a and b

CD player

Question 10 of 10

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