Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 12-science Answered

Why AC current cannot be used in electroplating?
Asked by Arti Chauhan | 28 Oct, 2012, 11:44: PM
answered-by-expert Expert Answer
In case of alternating current, the direction of current keeps changinf every 1/100th of a second.Due to changing direction of the current, the metallic ions in the electrolyte keeps shunting between the electrodes that keeps changing polarity. Hence AC current cannot be used in electroplating.
Answered by | 29 Oct, 2012, 01:19: PM

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 12-science - Physics
The value of instantaneous voltage received from a.c. source is given by following equation, V = 200-√2 sin 314t volt, then find the root mean square value of the source?
Asked by divyanshsahu109 | 11 Mar, 2024, 05:57: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
An inductor, a capacitor and a resistor are connected in series across an ac source of voltage. If the frequency of the source is decreased gradually. the reactance of: (a) both the inductor and the capacitor decreases. (b) inductor decreases and the capacitor increases. (c) both the inductor and the capacitor increases. (d) inductor increases and the capacitor decreases.
Asked by paresh0311 | 06 Mar, 2023, 04:42: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
What is a choke coil? Write its principle
Asked by akhilverma471001 | 27 Dec, 2022, 10:14: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
A motor drill draws 3.5 A current at the power line voltage 120 V(RMS). What is the motor's power if the current lags the voltage by 20 degrees?
Asked by arjunsah797 | 29 Mar, 2022, 07:25: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
A series LCR circuit with a 100 ohm resistor dissipates 80 W when attached to a 120 V, 60 Hz power line. What is the power factor?
Asked by arjunsah797 | 27 Mar, 2022, 08:00: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
The required no-load ratio in a 1 -phase 50 Hz core type transformer is 6000/250 V. Find the no. of turns in each winding if the flux is to be about 0.06 wbs.
Asked by saivardhanreddy15022003 | 11 Mar, 2022, 06:47: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
tan Phi = XL-XC/R, what is Tan Phi called here
Asked by sky11841 | 08 Sep, 2021, 10:04: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
transformer
Asked by mohitverma1017sn | 30 Dec, 2020, 08:57: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
a horizontal straight wire 10m long extending from east to west is falling with a speed of 5m/s at right angles to the horizontal component of the earth magnetic field 0.30  
Asked by a_k_garg | 11 Oct, 2020, 10:38: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
Prove that an ideal inductor does not dissipate power in an A.C circuit.
Asked by rishicool0205 | 19 Aug, 2020, 02:20: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×