Physics questions and answers

Physics Questions and Answers

If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.

3,601.

An electron of charge 1.6 x 1019C is accelerated in vacuum from rest at zero volt towards a plate of 40KV. Calculate the kinetic energy of the electron.

A.

4 x 10 25J

B.

4 x 1021 J

C.

6.4 x 1020 J

D.

6.4 x 10-15 J

E.

2.5 x 1020 J

Correct answer is D

No explanation has been provided for this answer.

3,602.

Which of the following is/are not affected by a magnetic field?
I. Neutrons
II. Cathode rays
III. Alpha particles

A.

I only

B.

II only

C.

III only

D.

I & III only

E.

I, II & III

Correct answer is A

No explanation has been provided for this answer.

3,603.

Which of the following is/are not correct about isotopes of an element? The have

A.

the same neutron number

B.

the same proton number

C.

same number of electrons

D.

same chemical properties

E.

different physical poperties.

Correct answer is A

No explanation has been provided for this answer.

3,604.

The unit of inductance is the

A.

farad

B.

henry

C.

hertz

D.

ampere

E.

coulomb

Correct answer is B

No explanation has been provided for this answer.

3,605.

Which of the following explains the concave meniscus of water in a glass tube?

A.

The adhesion between water and glas is greater than the cohesion between water molecules

B.

The cohesion between water molecule is greater than the adhesion between glass and water

C.

The molecules of water in the glass are moving faster than the molecules in the other parts

D.

The molecules of water at the water-air boundary are often attracted to the center of the tube

E.

The weight of the water pulls the central part of the surface down

Correct answer is A

No explanation has been provided for this answer.