Mukul Sahgal and A C Sahgal Solutions for Exercise 3: EXERCISES
Mukul Sahgal Science Solutions for Exercise - Mukul Sahgal and A C Sahgal Solutions for Exercise 3: EXERCISES
Attempt the practice questions from Exercise 3: EXERCISES with hints and solutions to strengthen your understanding. Living Science 7 solutions are prepared by Experienced Embibe Experts.
Questions from Mukul Sahgal and A C Sahgal Solutions for Exercise 3: EXERCISES with Hints & Solutions
The strength of a magnetic field due to a solenoid can be increased by
Which of these is absolutely necessary in an electric circuit?
The core of an electromagnet can be made up of any metal.
An electric bell has an arrangement to supply intermittent current to the electromagnet in it.
Draw the symbols used in a Circuit for—a battery of four cells, a switch, a lamp.
Draw a circuit diagram of a dry cell connected to a bulb through a switch. Mark the positive and negative terminals of the cell, and the direction of flow of current in the diagram.
You have seen that the heating effect of current can be put to good use. Can you think of situations where this effect results in wastage of energy?
Be a scientist. Which of these circuits will the lamp glow when the switch is on? Explain the reason in each case.
