If 1 A current flows in a circuit, the number of electrons flowing through this circuit is A. 0.625 × 1019 B. 1.6 × 1019 C. 1.6 × 10-19 D. 0.625 × 10-19 The charge of one electron is 1.6 ×…
The resistivity of the conductor depends on A. area of the conductor. B. length of the conductor. C. type of material. D. none of these. The resistivity is a property of material, defined as the resistance between two opposite faces…
The resistance of a conductor of diameter d and length l is R Ω. If the diameter of the conductor is halved and its length is doubled, the resistance will be A. R Ω B. 2R Ω C. 4R Ω…
How many coulombs of charge flow through a circuit carrying a current of 10 A in 1 minute? A. 10 B. 60 C. 600 D. 1200 1 Ampere current means flowing of 1 Coulomb charge per second. That means 10…
The unit of resistivity is A. Ω. B. Ω – metre. C. Ω / metre. D. Ω / m².
Instantaneous power in inductor is proportional to the A. product of the instantaneous current and rate of change of current. B. square of instantaneous current. C. square of the rate of change of current. D Temperature of the inductor. The…
The voltage induced in an inductor is represented as, A. product of its inductance and current through it. B. ratio of its inductance to the current through it. C. ratio of the current through it to its inductance. D. product…
Magnetic flux has the unit of A. Newton B. Ampere-turn C. Weber D. Tesla The unit of magnetic flux is called Weber in honor of famous scientist Wilhelm Eduard Weber (1804 – 1891). Magnetic flux has also another unit named…
If P is the power of a star connected system then what will be power of an equivalent delta connected system?A. P B. 3P C. P/3 D. None of the above Assume 3 numbers of pure resistive loads each of…
Which of the followings is/are active element? A. Voltage source B. Current source C. Both D. None of these. Active elements are capable of delivering energy independently for long time or ideally infinite time. Both voltage and current source are…