KCET2021PhysicsCurrent Electricity
What will be the reading in the voltmeter and ammeter of the circuit shown?
Options
- A90 ~V , 2 ~A
- B0,2 ~A
- C90 ~V , 1 ~A
- D0,1 ~A
Correct answer
B. 0,2 ~A
Step-by-step solution
Given, X_ L =X_ C =4 Voltage across X_ C and X_ L is same in magnitude but opposite in direction. So, net voltage is V_ net =V_ C -V_ L =0 Since, the voltmeter is connected across the series connection of capacitor and inductor. So, the reading of voltmeter is equal to V_ net i.e., zero. Current in the circuit, aligned I &= V Z &= V R²+ (X_ L -X_ C )² &= 90 (45)⁵+(4-4)² = 90 45 =2 ~A aligned