physics

Which of the following is true of an electrical charge?

A. Positive charge means deficit electrons B. Negative charge means excess of electrons C. electric current means movement of electrons…

5 years ago

Natural radioactivity consists of the emission of?

A. α- particles and β-rays B. α- particles and X-rays C. α- particles, β - rays and γ-rays D. γ-…

5 years ago

A narrow beam of white light can be split up into different Colours by a glass prism. The correct explanation is that?

A. white light Is an electromagnetic wave B. the prism has all the colours of the white light C. different…

5 years ago

Cathode rays are?

A. High-energy electromagnetic waves B. protons C. neutrons D. streams of electrons Correct Answer: Option D - streams of electrons…

5 years ago

Which of the following best describes the energy changes which take place when a steam engine drives a generator which lights a lamp?

A. heat → Light → Sound → Kinetic B. Kinetic → Light → Heat → Electricity C. heat → Kinetic…

5 years ago

What is the resultant resistance of the circuit in the image shown?

A. 8Ω B. 11Ω C. 4Ω D. 3.6Ω Correct Answer: Option A - 8Ω

5 years ago

During the same interval, it is observed that a train travels the same distance as does a lorry. The two vehicles therefore have the same?

A. uniform accelation B. instateneous velocity C. initial velocity D. average speed E. average velocity Correct Answer: Option D -…

5 years ago

The unit of inductance is the?

A. farad B. henry C. hertz D. ampere E. coulomb Correct Answer: Option B = henry

5 years ago

Which of the following is not an electromagnetic radiation?

A. X-ray B. Radio waves C. Sunlight D. Sound waves E. Infra-red radiation Correct Answer: Option D - Sound waves

5 years ago