# Magnetic Fields and Forces

## Quiz by Dina T

Feel free to use or edit a copy

includes Teacher and Student dashboards

### Measure skillsfrom any curriculum

Measure skills

from any curriculum

Tag the questions with any skills you have. Your dashboard will track each student's mastery of each skill.

With a free account, teachers can

- edit the questions
- save a copy for later
- start a class game
- automatically assign follow-up activities based on students’ scores
- assign as homework
- share a link with colleagues
- print as a bubble sheet

10 questions

Show answers

- Q1A long solenoid that has 1,030 turns uniformly distributed over a length of 0.425 m produces a magnetic field of magnitude 1.0 × 10⁻⁴ T at its center. What current is required in the windings for that to occur?32.8 mA43.9 mA14.8 mA54.7 mA300s
- Q2Certain experiments must be performed in the absence of any magnetic fields. Suppose such an experiment is located at the center of a large solenoid so that a current of 1.70 A produces a magnetic field that exactly cancels Earth’s 4.30 x 10⁻⁵ T field. Find the solenoid’s number of turns per meter24 turns/m18 turns/m20 turns/m15 turns/m120s
- Q3A long straight wire carries a current of 2.10 A in the direction shown below. What is the direction of the magnetic field at point P below the wire?DownwardOut of the pageInto the pageUpward120s
- Q4The magnetic field at a distance of 2 cm from a current carrying wire is 4 μT. What is the magnetic field at a distance of 8 cm from the wire?16 μT4 μT0.5 μT1 μT120s
- Q5Using the directions of the current and Magnetic field shown in the image, find the direction of the Force on the wireInto the pageOut of the pageTo the rightTo the left120s
- Q6A proton of charge 1.6 x 10⁻¹⁹ C moving at 5.20 x 10⁶ m/s through a magnetic field of magnitude 1.78 T experiences a magnetic force of 7.0 x 10⁻¹³ N. What is the angle between the proton’s velocity and the field?42.9°28.2°20.5°34.8°300s
- Q7A horizontal power line of length 44 m carries a current of 2.9 kA as shown below. Earth’s magnetic field has a magnitude of 5.0 x 10⁻⁵ T and makes an angle of 65° with the power line. Find the magnitude of the magnetic force on the power line.6.88 N3.76 N5.78 N4.25 N120s
- Q8Which of the following changes can be made to make an electromagnet stronger?Decrease the currentReduce the number of turnsPut an iron core inside the solenoidMake the solenoid longer60s
- Q9The path of a charged particle moving parallel to a uniform magnetic field will be a ___________parabolastraight linecirclehelix60s
- Q10The current in a long wire creates a magnetic field in the region around the wire. How is the strength of the field at distance 𝑟 from the wire center related to the magnitude of the field?Field directly proportional to rField directly proportional to r²field inversely proportional to rField inversely proportional to r²60s