Electrical Oscillations
Trending Questions
Q. A constant voltage is applied to a series R -L circuit by closing the switch. The voltage inductor (L=2H) is 20 V at t=0 and drops 5v at 20 m/sec . The value of R in ohm
Q. Given AC circuit can be purely resistive if
![](https://s3-us-west-2.amazonaws.com/infinitestudent-images/ckeditor_assets/pictures/457642/original_Q.6.png)
![](https://s3-us-west-2.amazonaws.com/infinitestudent-images/ckeditor_assets/pictures/457642/original_Q.6.png)
- Frequency w = 0
- Frequency w=√1LC−R2L2
- If R>LC
- Given circuit can never be purely resistive.
Q. The natural frequency of a L-C circuit is equal to
- 12π√LC
- 12π√LC
- 12π√LC
- 12π√CL
Q. In the adjoining figure the impedance of the circuit will be
![](https://s3-us-west-2.amazonaws.com/infinitestudent-images/ckeditor_assets/pictures/17543/content_imageedit_11_9953281898.png)
![](https://s3-us-west-2.amazonaws.com/infinitestudent-images/ckeditor_assets/pictures/17543/content_imageedit_11_9953281898.png)
- 120 ohm
- 50 ohm
- 60 ohm
- 45 ohm
Q. In the figure shows R=100Ω, L=2π H, and C=8π μF are connected in series with an a. c. source of 200 volts and frequency f. V1 and V2 are two hot-wire voltmeters. If the readings of V1 and V2 are same then which of the following is not correct.
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1695382/original_Asset_8.png)
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1695382/original_Asset_8.png)
- V1=V2=1000 volt
- Current through R is 2 A
- f=125 Hz
- f=250π Hz