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Alternating current (a.c) can be stepped up easily to high voltage thereby minimizing power loss.
joseph rimiru answered the question on December 4, 2017 at 20:03
- Heating in the coils when current flows is one of the causes of energy loss in a transformer. State : (i) The reason why the current causes...(Solved)
Heating in the coils when current flows is one of the causes of energy loss in a transformer. State :
(i) The reason why the current causes heating.
(ii)How the heating can be minimized.
Date posted: December 4, 2017. Answers (1)
- The primary coil of a transformer has 2000 turns and secondary coil is connect to a 240V a.c. mains supply (a) Explain how an e.m.f. is...(Solved)
The primary coil of a transformer has 2000 turns and secondary coil is connect to a 240V a.c. mains supply.
(a)Explain how an e.m.f. is induced in the secondary voltage.
(b)Determine the secondary voltage
Date posted: December 4, 2017. Answers (1)
- In a transformer the ratio of primary to secondary is 1:10. A current of 200mA flow through a 200 ohm resistor in the secondary circuit....(Solved)
In a transformer the ratio of primary to secondary is 1:10. A current of 200mA flow through a 200 ohm resistor in the secondary circuit. Assuming that the transformer is 100% efficient, determine:
a. The secondary voltage.
b. The primary voltage.
c. The primary current.
Date posted: December 4, 2017. Answers (1)
- Electric power is transmitted over long distance at high voltage. Explain.(Solved)
Electric power is transmitted over long distance at high voltage. Explain.
Date posted: December 4, 2017. Answers (1)
- Explain how the energy losses are reduced in a transform by having : (a) A soft iron core (b) A laminated core(Solved)
Explain how the energy losses are reduced in a transform by having :
a. A soft iron core
b. A laminated core
Date posted: December 4, 2017. Answers (1)
- State the five terms of the semi empirical mass formula.(Solved)
State the five terms of the semi empirical mass formula.
Date posted: November 30, 2017. Answers (1)
- What is a transistor?(Solved)
What is a transistor?
Date posted: November 30, 2017. Answers (1)
- State the two purposes of the iron core in AC transformer.(Solved)
State the two purposes of the iron core in AC transformer.
Date posted: November 30, 2017. Answers (1)
- Give factors to be considered when choosing the type of instrument used in measuring?
(Solved)
Give factors to be considered when choosing the type of instrument used in measuring?
Date posted: November 30, 2017. Answers (1)
- State two drawbacks of Thomson's Atomic model.(Solved)
This is under Atomic Physics
Date posted: November 29, 2017. Answers (1)
- State three types of chemical bonding.(Solved)
This is under solid state Physics.
Date posted: November 29, 2017. Answers (1)
- List five applications of friction(Solved)
List five applications of friction
Date posted: November 27, 2017. Answers (1)
- What is friction?(Solved)
What is friction?
Date posted: November 27, 2017. Answers (1)
- State the law of conservation of linear momentum (Solved)
State the law of conservation of linear momentum
Date posted: November 27, 2017. Answers (1)
- What is a linear collision?(Solved)
What is a linear collision?
Date posted: November 27, 2017. Answers (1)
- State Newton’s third law (law of interaction)(Solved)
State Newton’s third law (law of interaction)
Date posted: November 27, 2017. Answers (1)
- What is dispersion of white light? (Solved)
What is dispersion of white light?
Date posted: November 27, 2017. Answers (1)
- Explain the effects of total internal reflection(Solved)
Explain the effects of total internal reflection.
Date posted: November 27, 2017. Answers (1)
- Explain what total internal reflection is.(Solved)
Explain what total internal reflection is.
Date posted: November 27, 2017. Answers (1)
- State the law of reversibility.(Solved)
State the law of reversibility.
Date posted: November 27, 2017. Answers (1)