1. While comparing magnetic and electric circuits, the flux of magnetic circuit is compared with which parameter of electrical circuit? A. E.M.F. B. Current C. Current density D. Conductivity Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
2. Point out the wrong statement. Magnetic leakage is undesirable in electric machines because it A. Lowers their power efficiency B. Increases their cost of manufacture C. Leads to their increased weight D. Produces fringing Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
3. The unit of magnetic flux is A. Henry B. Weber C. Ampere-turn/weber D. Ampere/metre Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
4. Laminated cores, in electrical machines, are used to reduce A. Copper loss B. Eddy current loss C. Hysteresis loss D. All of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
5. Those materials are well suited for making permanent magnets which have ________ retentivity and ________ coercivity. A. Low, high B. High, high C. High, low D. Low, low Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
6. Those magnetic materials are best suited for making armature and transformer cores which have ________permeability and _________hysteresis loss. A. High, high B. Low, high C. High, low D. Low, low Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
7. The initial rate of rise of current through a coil of inductance 10 H when suddenly connected to a D.C. supply of 200 V is ___________Vs A. 50 B. 20 C. 0.05 D. 500 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
8. Relative permeability of vacuum is A. 1 B. 1 H/m C. $$4\pi \times {10^{ - 7}}$$ D. $$\frac{1}{4}$$ Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
9. In a magnetic material hysteresis loss takes place primarily due to A. Rapid reversals of its magnetization B. Flux density lagging behind magnetizing force C. Molecular friction D. It high retentivity Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
10. Permeability in a magnetic circuit corresponds to_________ in an electric circuit. A. Resistance B. Resistivity C. Conductivity D. Conductance Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
