Class 7

Electric Current and its Effects question bank (Science)

Practice 72 free Class 7 Science - Electric Current and its Effects questions with answers and step-by-step solutions.

Start free Book a demo
All Easy Hard Medium
Q1.

An electric fuse works primarily on which principle of electric current?


(A)
Magnetic effect
(B)
Heating effect
(C)
Chemical effect
(D)
Optical effect
Show answer & solution
Verified Answer & Solution Locked
Sign in to your free student account to reveal verified answers, instant hints, and detailed explanations.
Sign in to view
Q2.

An electromagnet is formed by winding an insulated wire around an iron nail. Which property describes an electromagnet?


(A)
It is a permanent magnet that cannot be switched off
(B)
It only attracts plastic and wood
(C)
It behaves as a magnet only while electric current flows through its coil
(D)
Its magnetic strength cannot be altered
Show answer & solution
Verified Answer & Solution Locked
Sign in to your free student account to reveal verified answers, instant hints, and detailed explanations.
Sign in to view
Protected Questions

Unlock All 72 Questions in Electric Current and its Effects

Log in or sign up free to access every question with complete solutions, create chapter practice tests, and track your performance.

Sign in to unlock Create free account

Sign up free to access all 72 questions

Unlock every Electric Current and its Effects question, generate papers, and practice at your own pace.

Start free