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# Test: AC Applied To LCR In Series

## 10 Questions MCQ Test Physics Class 12 | Test: AC Applied To LCR In Series

Description
This mock test of Test: AC Applied To LCR In Series for Class 12 helps you for every Class 12 entrance exam. This contains 10 Multiple Choice Questions for Class 12 Test: AC Applied To LCR In Series (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: AC Applied To LCR In Series quiz give you a good mix of easy questions and tough questions. Class 12 students definitely take this Test: AC Applied To LCR In Series exercise for a better result in the exam. You can find other Test: AC Applied To LCR In Series extra questions, long questions & short questions for Class 12 on EduRev as well by searching above.
QUESTION: 1

Solution:
QUESTION: 2

### Phase angle between voltage and current in RLC circuit is given by

Solution:

Solution :- From the phasor diagram, the value of phase angle will be

tan ϕ = [V(L) - V(c)]/V(R)

tan ϕ = [X(L) - X(C)]/R

ϕ = tan^(-1) [X(L) - X(C)]/R

QUESTION: 3

### A 1.0 mH inductance, a10μF capacitance and a 5.0 ohm resistance are connected series to an a.c. source. It is found that inductor and the capacitor show equal reactance. The reactance should be nearest to:​

Solution:

From the formula we get,
XL=XC
ωL=1/ωC
⇒ω2=1/LC
⇒ω=1/√Lc
⇒ω=1/√10-3x10-5
⇒ω=104
We also know that,
XL=ωL
⇒XL=104x10-3
⇒XL=10 Ω
Therefore,XL=XC=10Ω

QUESTION: 4

In which of the following cases the power factor is not equal to 1​

Solution:
QUESTION: 5

What is the inductance of a choke required for a lamp running at 60 volt d.c consuming 5 A current connected to 110 volt, 50 Hz ac mains?

Solution:
QUESTION: 6

Ac and dc both can be measured by

Solution:
QUESTION: 7

What is the value of power factor in RLC circuit

Solution:
QUESTION: 8

In a series LCR what will be phase difference between voltage drop across inductor and capacitor

Solution:
QUESTION: 9

A resistance of 5 ohm and an inductance of 50 mH are connected in series with an a. c. I = 100 sin (100 t). What is the phase difference between the instantaneous current and voltage?​

Solution:
QUESTION: 10