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Alternating current moves in two directions, but a battery requires current flowing in one direction.
Alambi answered the question on August 23, 2018 at 07:34
- Explain the difference in the shape of the drops of mercury and water when placed on a clean glass surface(Solved)
Explain the difference in the shape of the drops of mercury and water when placed on a clean glass surface.
Date posted: August 21, 2018. Answers (1)
- The count rate of a radioactive indium falls from 3200 counts per minute to 200 counts per minutes in 220 minutes(Solved)
The count rate of a radioactive indium falls from 3200 counts per minute to 200 counts per minutes in 220 minutes. Determine the half-life of the radioactive isotope
Date posted: August 19, 2018. Answers (1)
- A white paper is a good reflector of light but does not form an image like a mirror. Explain this observation(Solved)
A white paper is a good reflector of light but does not form an image like a mirror. Explain this observation
Date posted: August 19, 2018. Answers (1)
- You are provided with the following apparatus. - a spring balance - a beaker - cork - a sinker - water(Solved)
You are provided with the following apparatus.
- a spring balance
- a beaker
- cork
- a sinker
- water
Using the above apparatus, describe an experiment to determine the relative density of cork.
Date posted: August 19, 2018. Answers (1)
- State the ways of increasing magnitude of the induced current and electromotive force produced by both the ac and dc generators (Solved)
State the ways of increasing magnitude of the induced current and electromotive force produced by both the ac and dc generators
Date posted: August 14, 2018. Answers (1)
- Describe eye defects(Solved)
Describe eye defects
Date posted: August 14, 2018. Answers (1)
- Explain the effects of surface tension(Solved)
Explain the effects of surface tension
Date posted: August 7, 2018. Answers (1)
- Distinguish between thermionic emission and photoelectric effect(Solved)
Distinguish between thermionic emission and photoelectric effect.
Date posted: August 7, 2018. Answers (1)
- Under what circumstances will a soap film not form in a funnel when dipped in a soap solution?(Solved)
Under what circumstances will a soap film not form in a funnel when dipped in a soap solution?
Date posted: August 7, 2018. Answers (1)
- In an experiment to determine size of an oil molecule, 100 drops of oil of volume 1.54 cm cubic were run out of a pipette one drop...(Solved)
In an experiment to determine size of an oil molecule, 100 drops of oil of volume 1.54 cm cubic were run out of a pipette one drop was carefully placed on surface of water dusted with lycopodium powder and spread to form a uniform circular patch diameter 17.5
1:calculate area of the patch
2:thickness of the patch
3:size of oil molecule
Date posted: August 7, 2018. Answers (1)
- A garden sprinkler has 30 holes each of crossectional area 0.00006 square m and is connected to a hosepipe of ACS 0.0025 square m. If...(Solved)
A garden sprinkler has 30 holes each of crossectional area 0.00006 square m and is connected to a hosepipe of ACS 0.0025 square m. If the speed of water in the hosepipe is 2m/s calculate the speed of water as it emerges from the holes
Date posted: August 6, 2018. Answers (1)
- A stone is dropped from the top of a tower 50m tall and another stone is projected vertically upwards at 40m/s at the same time....(Solved)
A stone is dropped from the top of a tower 50m tall and another stone is projected vertically upwards at 40m/s at the same time. Determine the time taken for stones To meet.
Date posted: August 6, 2018. Answers (1)
- X-rays are used for detecting cracks inside metal beams.(i) State the type of the X-rays used(ii) Give a reason for your answer in (i) above.(Solved)
X-rays are used for detecting cracks inside metal beams.
(i) State the type of the X-rays used.
(ii) Give a reason for your answer in (i) above.
Date posted: August 2, 2018. Answers (1)
- A force of 100N is applied to an area of 100 square millimeters. What is the pressure exerted on the area?(Solved)
A force of 100N is applied to an area of 100 square millimeters. What is the pressure exerted on the area?
Date posted: July 20, 2018. Answers (1)
- Distinguish between atomic structure and crystal structure(Solved)
Distinguish between atomic structure and crystal structure.
Date posted: July 13, 2018. Answers (1)
- An immersion heater rated 240V, 10A is connected to a 250V mains supply. If it is used to heat 5kg of water at 20°, find...(Solved)
An immersion heater rated 240V, 10A is connected to a 250V mains supply. If it is used to heat 5kg of water at 20°, find the temperature of the water after 7 minutes of heating. (3 marks)
Date posted: July 11, 2018. Answers (1)
- The term dipoles and domains are commonly used in magnetism. Distinguish between the two.(Solved)
The term dipoles and domains are commonly used in magnetism. Distinguish between the two.
Date posted: July 10, 2018. Answers (1)
- Give the basic difference between direct current (D.C) generator and alternating current (A.C) generator.(Solved)
Give the basic difference between direct current (D.C) generator and alternating current (A.C) generator.
Date posted: July 9, 2018. Answers (1)
- A light bulb is labelled 240V, 60W. Determine the resistance of the filament.(Solved)
A light bulb is labelled 240V, 60W. Determine the resistance of the filament.
Date posted: July 8, 2018. Answers (1)
- Why are machines not 100% efficient?(Solved)
Why are machines not 100% efficient?
Date posted: July 5, 2018. Answers (1)