Physics WAEC - Page 19 of 259

$An electrical device has 50 turns in its primary coil and 20 turns in the secondary coil. The device can be a\an?$

An electrical device has 50 turns in its primary coil and 20 turns in the secondary coil. The device can be a\an?

A. step-up transformer B. step-down transformer C. d.c generator D. a.c generator Correct Answer: Option B – step-down transformer Explanation In a step down transformer, there are more turns in the primary coil than in the secondary coil and more current flows...

$An electrical device has 50 turns in its primary coil and 20 turns in the secondary coil. The device can be a\an?$

Which of the following statements explain why hot soapy water is more effective in cleaning oil-stained dishes?

by Sunday | Mar 23 | Physics WAEC

A. The oil on the dishes repels the soap B. soap and heat decrease the surface tension of oil C. soap increases the surface tension of oil and water D. Hot water increases the surface tension of oil Correct Answer: Option B = soap and heat decrease the surface tension...

$An electrical device has 50 turns in its primary coil and 20 turns in the secondary coil. The device can be a\an?$

The earpiece of a telephone handset converts energy from

by Sunday | Mar 23 | Physics WAEC

A. electrical to sound B. sound to electrical C. sound to electrical D. sound to radio wave Correct Answer: Option A = electrical to sound

$An electrical device has 50 turns in its primary coil and 20 turns in the secondary coil. The device can be a\an?$

The material used to slow down the neutrons in a nuclear reactor is

by Sunday | Mar 23 | Physics WAEC

A. boron B. copper C. graphite D. uranium Correct Answer: Option C – graphite

$An electrical device has 50 turns in its primary coil and 20 turns in the secondary coil. The device can be a\an?$

The depolarising agent in a Leclanche cell is?

by Sunday | Mar 23 | Physics WAEC

A. carbon rod B. ammonium chloride C. manganese (IV) oxide D. zinc plate Correct Answer: Option C – manganese (IV) oxide

$An electrical device has 50 turns in its primary coil and 20 turns in the secondary coil. The device can be a\an?$

Which of the following waves requires a material medium for its propagation?

by Sunday | Mar 23 | Physics WAEC

A. Radio waves B. Light waves C. Sound waves D. X-rays Correct Answer: Option C = Sound waves Explanation – Electromagnetic waves are waves that have no medium to travel whereas mechanical waves need a medium for its transmission. – sound wave is an...

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An electrical device has 50 turns in its primary coil and 20 turns in the secondary coil. The device can be a\an?

Which of the following statements explain why hot soapy water is more effective in cleaning oil-stained dishes?

The earpiece of a telephone handset converts energy from

The material used to slow down the neutrons in a nuclear reactor is

The depolarising agent in a Leclanche cell is?

Which of the following waves requires a material medium for its propagation?

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