# AP (Advanced Placement) Physics(B-C): Questions 121 - 124 of 921

Access detailed explanations (illustrated with images and videos) to 921 questions. Access all new questions- tracking exam pattern and syllabus. View the complete topic-wise distribution of questions. Unlimited Access, Unlimited Time, on Unlimited Devices!

View Sample Explanation or View Features.

Rs. 450.00 -OR-

## Question 121

### Question

MCQ▾

Four equally charged positive particles are held in position in a square arrangement, so that each side of the square has a length . What is the net electric field at the center of the square due to the four charges?

### Choices

Choice (5)Response

a.

b.

c.

d.

0

e.

All of the above

## Question 122

### Question

MCQ▾

Four equally positively charged particles are placed at the vertex of square. each side of the square has a length . What is the net force on an electron placed at the center of the square?

### Choices

Choice (5)Response

a.

b.

0

c.

d.

e.

Question does not provide sufficient data or is vague

## Question 123

### Question

MCQ▾

A curved path of a radius is banked (angled with the horizontal) at . Suppose that an ice storm hits, and the curved path is covered with ice so that it is effectively frictionless. A car of mass is moving through this curved path with constant velocity. Then, find the velocity of the car.

### Choices

Choice (5)Response

a.

b.

c.

d.

e.

None of the above

## Question 124

### Question

MCQ▾

A string of negligible mass connects three blocks on a level surface, as shown in the illustration. A force of is exerted on the block, and the friction force on each block is . What is the acceleration of block of mass ?

### Choices

Choice (5)Response

a.

b.

c.

d.

e.

None of the above

Developed by: