Let's revise

Author:K K Gupta & Stalin Malhotra

K K Gupta Science Solutions for Exercise - Let's revise

Simple step-by-step solutions to Let's revise questions of Electric Current and its Effects from Frank Everyday Science. Also get 3D topic explainers, cheat sheets, and unlimited doubts solving on EMBIBE.

Questions from Let's revise with Hints & Solutions

EASY
7th CBSE
IMPORTANT

This works on the principle of heating effect of current

EASY
7th CBSE
IMPORTANT

To make a battery of two cells, the negative terminal of one cell is connected to the negative terminal of the other cell.

EASY
7th CBSE
IMPORTANT

When the electric current through the fuse exceeds a certain limit, the fuse wire melts and breaks.

EASY
7th CBSE
IMPORTANT

The magnetic strength in a conductor decreases with the increase in current.

MEDIUM
7th CBSE
IMPORTANT

In which of the figures will the bulb glow and why?

MEDIUM
7th CBSE
IMPORTANT

In which of the following circuits will the bulb glow the brightest? Given that all the cells used supply equal current.

MEDIUM
7th CBSE
IMPORTANT

Which one of the following is a stronger electromagnet? Why?

EASY
7th CBSE
IMPORTANT

_____ works on the heating effect of current.