Round 2

Round 2

11th - 12th Grade

15 Qs

quiz-placeholder

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Round 2

Round 2

Assessment

Quiz

Physics, Chemistry, Biology

11th - 12th Grade

Practice Problem

Hard

Created by

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Used 3+ times

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15 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Media Image

The figure above shows a thin, square, nonconducting sheet of positive charge uniformly distributed over its area. The length of each side of the sheet is a. Point C is at the center of the sheet. Point X is a distance d above the center of the sheet, and point Y is a distance 2d above the center of the sheet. Assume a >> d. The effect of gravity is negligible.

E/4

E/2

E

2E

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Media Image

Conductor Y is then moved closer to conductor X until it is just outside a closed cubical surface containing conductor X, as shown in the figure above. How would the total electric flux through the cubical surface change as conductor Y is moving?

It would increase

It would decrease

It would change sign

It would remain constant, with the flux through each side of the surface also remaining constant.

It would remain constant, but the flux through each side of the cubical surface would change.

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which of the following will increase the magnetic field on the axis of a long solenoid?

I. Increasing the current in the solenoid

II. Increasing the cross-sectional area of the solenoid

III. Inserting an iron core into the solenoid

I only

III only

I and III only

II and III only

I, II, and III

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Media Image

Three identical spheres are equally spaced from one another. Spheres 1 and 2 have charge +Q, and sphere 3 has a charge of –Q, as shown in the figure above. Five different positions are labeled A, B, C, D, and E. Positions A, B, and C are all the same distance from sphere 3. Positions C, D, and E are all the same distance from sphere 2. All spheres and points lie in the same plane.

A

B

C

D

E

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Two stationary point charges of unknown magnitude and sign are isolated from all other charges. If the electric field strength is zero at the midpoint of the line joining them, which of the following can be concluded about the charges?

They are equal in magnitude but opposite in sign.

They are equal in magnitude and have the same sign.

They are not necessarily equal in magnitude but have opposite signs.

They are not necessarily equal in magnitude but have the same sign.

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Media Image

A student performs an acid-base titration and plots the experimental results in the graph above. Which of the following statements best explains the experimental findings?

A strong acid was titrated with a strong base, as evidenced by the equivalence point at pH = 7

A strong acid was titrated with a strong base, as evidenced by the equivalence point at pH > 7

A weak acid was titrated with a strong base, as evidenced by the equivalence point at pH > 7

A weak acid was titrated with a weak base, as evidenced by the equivalence point at pH approximately 7

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Based on the Ksp values in the table above, a

saturated solution of which of the following

compounds has the highest [Cl-] ?

PbCl2

CuCl

AgCl

Hg2Cl2

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