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MODERN PUBLICATION-ALTERNATING CURRENTS-EXERCISE
- Prove that in an a.c. circuit, an ideal capacitor does nt dissipate po...
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- The instantaneous current and voltage in an a.c. circuit given by I = ...
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- What do you mean by power factor? On what factors does it depend?
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- Explain the importance of power factor.
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- For circuit used for transporting electric power, a low power factor i...
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- Why power factor correction is must in heavy machinery?
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- Power factor can often be improved by the use of capacitor of appropri...
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- Which is more dangerous in use a.c. or d.c.? Explain, why?
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- Why 200 V a.c. more dangerous than 220 V d.c.?
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- Why 200 V a.c. more dangerous than 220 V d.c.?
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- Why is the use of A.C. voltage preferred over D.C. voltage? Give two r...
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- The circuit arrangement given in the figure shows that when an ac. pas...
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- The circuit arrangement given in the figure shows that when an ac. pas...
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- In India domestic power supply is at 220 V, 50Hz. While in USA it is 1...
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- What are the factors which reduce the efficiency of a transformer ?
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- How are the energy losses reducedin a transformer ?
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- What are the factors which reduce the efficiency of a transformer ?
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- Why the core of a transformer made of a magnetic material of high perm...
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- Why the core of a transformer made of a magnetic material of high perm...
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- A step up transformer converts a low input voltage into a high output ...
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