physics

When the human eye loses its power of accommodation; the defect is known as?

A. short-sightedness B. presbyopia C. astigmatism D. long-sightedness Correct Answer: Option B - presbyopia Explanation Presbyopia is loss of accommodation

5 years ago

Three similar cells each of e.m.f 2V and internal resistance 2Ω are connected in parallel; the total e.m.f and total internal resistance are respectively?

A. 6V, 6.0Ω B. 2V, 0.7Ω C. 2V, 6.0Ω D. 6V, 0.7Ω Correct Answer: Option B - 2V, 0.7Ω Explanation…

5 years ago

which of the processes above can be explained using the kinetic theory?

I. change of state II. Diffusion III. Radiation IV. Osmosis A. I, II,III and IV B. I, II and III…

5 years ago

Steam burn is more severe than that of boiling water because?

A. steam burn is independent of relative humidity B. steam possesses greater heat energy per unit mass C. water boils…

5 years ago

In measuring high frequency in A.C; the instrument used is the?

A. d.c ammeter B. moving coil ammeter C. moving iron ammeter D. hot wire ammeter Correct Answer: Option D -…

5 years ago

Which of the following is a property of steel?

A. it cannot retain its magnetism longer than iron B. it can be used for making temporary magnets C. it…

5 years ago

The eclipse of the sun occurs when the?

A. moon is between the sun and the earth B. earth is between the sun and the moon C. moon…

5 years ago

The capacitance of a parallel plate capacitor is 20 μf in air and 60 μf in the presence of a dielectric. What is the dielectric constant?

A. 0.3 B. 6.0 C. 3.0 D. 2.0 Correct Answer: Option C - 3.0 Explanation Dielectric constant = (c)/c° =…

5 years ago

Which of the following electromagnetic waves has the highest frequency?

A. ultraviolet rays B. radio waves C. X-rays D. infrared - rays Correct Answer: Option C = X-rays Explanation X…

5 years ago