Ncert Exercises & Solutions

Which of the following combinations should be selected for better tuning of an LCR circuit used for communication?

1. R = 20 Ω , L = 15 H , C = 35 μF

2. R = 25 Ω , L = 2 . 5 H , C = 45 μF

3. R = 15 Ω , L = 3 . 5 H , C = 30 μF

4. R = 25 Ω , L = 1 . 5 H , C = 45 μF

Step 1: Quality factor (Q) of an L

-

-

R circuit is given by,

Q = \frac{1}{R} \sqrt{\frac{L}{C}}

where R is resistance, L is the inductance and C is the capacitance of the circuit.

Step 2: To make Q high, L should be high and C should be low.

These conditions are best satisfied by the values given in option (c).

NEET Information

courses

Company

Botany Questions

Chemistry Questions

Physics Questions

Zoology Questions