1. Which of the following is a vector quantity? A. Relative permeability B. Magnetic field intensity C. Flux density D. Magnetic potential 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. What is the magneto-motive force (mmf) of a wire with 8 turns carrying three amperes of current? A. 2,400 At B. 240 At C. 24 At D. 2.4 At 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
3. Magnetism of a magnet can be destroyed by A. heating B. hammering C. by inductive action of another magnet D. by all above methods 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
4. Strength of an electromagnet can be increased by A. increasing the cross-sectional area B. increasing the number of turns C. increasing current supply D. all above methods 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
5. What is the magneto-motive force in a 75-turn coil of wire when there are 4 A of current through it? A. 18.75 At B. 30 At C. 300 At D. 187 At 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
6. A magnetic field exists around A. iron B. copper C. aluminium D. moving charges 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
7. What will be the magnetic potential difference across the air gap of 2 cm length in magnetic field of 200 AT/m? A. 2 AT B. 4 AT C. 6 AT D. 10 AT 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. When an iron piece is placed in a magnetic field A. the magnetic lines of force will bend away from their usual paths in order to go away from the piece B. the magnetic lines of force will bend away from their usual paths in order to pass through the piece C. the magnetic field will not be affected D. the iron piece will break 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
9. Temporary magnets are used in A. loud-speakers B. generators C. motors D. all of the above 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. One maxwell is equal to A. 10-8 webers B. 10-4 webers C. 108 webers D. 104 webers 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
