NECO Past Questions and Answers - Page 233

1,161.

It is NOT possible to determine exactly and simultaneously the position and momentum of a particle. This statement is known as the

A.

Crompton effect

B.

de Broglie’s laws

C.

Frank-Hertz experimental law

D.

Heisenberg’s uncertainly principle

E.

wave-particle paradox

Correct answer is D

No explanation has been provided for this answer.

1,162.

An a.c. generator can be converted into a d.c. generator by replacing

A.

the slip rings with split-ring commutators

B.

the slip rings with armatures

C.

the split-rings with slip rings

D.

the split-rings with brushes

E.

the brushes with slip-ring commutators.

Correct answer is A

No explanation has been provided for this answer.

1,163.

The wavelength of a stationary wave is 36.0cm. What is the distance between a node and the next anti-node?

A.

6.0cm

B.

9.0cm

C.

18.0cm

D.

360cm

E.

72.0cm

Correct answer is B

No explanation has been provided for this answer.

1,164.

According to the Kinetic Theory, what does NOT occur when the temperature of a constant volume of gas is increased?

A.

a decrease in the mean speed kinetic energy of the molecules

B.

an increase in the mean speed of the molecules

C.

an increase in the momentum change at each collision.

D.

an increase in the number of collisions per second

E.

an increase in the pressure exerted by the gas.

Correct answer is A

No explanation has been provided for this answer.

1,165.

A body of mass M1 moving with a velocity U collides with a stationary body of mass M2 and both move with a common velocity V. If linear momentum is conserved, which expression correctly represents V?

A.

M1 + M2 ÷ M1U

B.

M2U ÷ M1 – M2

C.

M1U ÷ M1 – M2

D.

M1U ÷ M1+ M2

E.

M2U ÷ M1 + M2

Correct answer is D

No explanation has been provided for this answer.