Electricity And Magnetism - Study Mode

[#86] A current of 5A is taken by a filament for 10 minutes. Find the amount of electric charge flowing through the circuit.
Correct Answer

(A) 3000 C

[#87] A rectangular coil of copper wire is rotating in a magnetic field. The direction of the induced current changes once in each?
Correct Answer

(C) Half revolution

[#88] Assertion (A): Light Emitting Diode (LED) lamps offer longer service life as compared to Compact Fluorescent Lamps (CFL). Reason (R): Light Emitting Diodes (LED) lamps are more energy efficient as compared to the Compact Fluorescent Lamps (CFL). Select the correct answer:
Correct Answer

(A) Both (A) and (R) are true and (R) is the correct explanation of (A)

[#89] Electric current is equals to
Correct Answer

(B) $$l = frac{Q}{t}$$

[#90] Which is the gas inside an electric bulb?
Correct Answer

(D) Both A and B