Electricity and Magnetic Fundamentals

31. A test charge means a charge of

1. -1 C
2. 1 electron
3. +1 C
4. -20 C

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32. A theorem which states that an electric current flowing in a circuit produces a magnetic field at external points equivalent to that due to a magnetic shell whose bounding edge is the conductor and whose strength of the current.

1. Joule's law
2. Faraday's law
3. Volta's theorem
4. Ampere's theorem

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33. All magnetic field originates from

1. moving electric charge
2. Iron atoms
3. Magnetic domain
4. Permanent magnets

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34. All matters (gas, liquid and solid) are composed of

1. Neutrons
2. Particles
3. Electrons
4. Atoms

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35. Amorphous solid is also called

1. Crystalline
2. Non- crystalline
3. Polycrystalline
4. Homogenous

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36. An alloy of 22 percent iron and 78 per cent nickel.

1. Permalloy
2. Alnico
3. Constantan
4. Manganin

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37. An alloy of 40 percent iron and 60 percent nickel.

1. Alnico
2. Permalloy
3. Hipernik
4. Manganin

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38. An atom or a group of atoms that carries a net electric charge.

1. Positive ion
2. Negative ion
3. Ion
4. Electron

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39. An effect which is generally used in the gausameter to measure flux density.

1. Skin effect
2. Magnetic effect
3. Hall effect
4. Flywheel effect

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40. An electron- volt (eV) is a unit of

1. Energy
2. Potential difference
3. Charge
4. Momentum

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