Adaptive Practice
Electricity and Magnets
10 questions • Earn up to 104 XP • First attempt — go for 100%!
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Question 1 of 10
⏱ 0:30
Easy
What is the unit of electric current?
Easy
Which material is commonly used as the filament in electric bulbs due to its high melting point?
Medium
In a series circuit with three resistors of 2 Ω, 3 Ω, and 5 Ω, what is the total resistance?
Easy
Which of the following devices converts electrical energy into mechanical energy?
Medium
What happens to the magnetic field around a current-carrying wire if the current is reversed?
Hard
Which law explains the force experienced by a current-carrying conductor in a magnetic field?
Medium
In an electric circuit, if the voltage is doubled and resistance remains constant, what happens to the current?
Medium
Which of the following is a property of magnetic field lines?
Hard
What is the main reason for using a step-up transformer in power transmission?
Easy
A solenoid carrying current produces a magnetic field similar to that of a: