Electricity and Magnetic Fundamentals

261. What is used as the dielectric material in high voltage transformers?

1. Mica
2. Paraffin
3. Porcelain
4. Oiled paper

View answer

262. What is used as the insulating material or dielectric in an electric ion?

1. Oiled paper
2. Mica
3. Paraffin
4. Titanate compound

View answer

263. What principle states that each electron in an atom must have a different set of quantum numbers?

1. Inclusion principle
2. Exclusion principle
3. Quantum principle
4. Electron principle

View answer

264. What revolves about the positive nucleus in a definite orbit?

1. Atom
2. Proton
3. Electron
4. Neutron

View answer

265. What solid has no defined crystal structure except perhaps in the arrangement of the nearest neighboring atoms or ions?

1. Crystalline
2. Amorphous
3. Polycrystalline
4. Poly- amorphous

View answer

266. What type of bond is formed when there exists some form of collective interactions between the (negatively charged) electrons and (positively charged) nuclei in a solid?

1. Ionic
2. Covalent
3. Metallic
4. Van der Waals

View answer

267. When a conductor is stationary and the magnetic field is moving or changing the emf induced is called

1. Statically induced emf
2. Mutually induced emf
3. Self induced emf
4. Dynamically induced emf

View answer

268. When a current carrying conductor is placed in a magnetic field, the maximum force will act on the conductor when the conductor is at an angle of _________ to the magnetic field.

1. 45°
2. 60°
3. 30°
4. O°

View answer

269. When a wire loop is rotated in a magnetic field the direction of the induced emf changes one in every _________ revolution

1. 43891
2. 43862
3. 43922
4. 43892

View answer

270. When the current flows, the magnetic field ... conductor is in what direction?

1. The same as the current direction
2. Opposite the current direction
3. Omnidirectional
4. In the direction determined by the left hand rule

View answer