Question 1 What is an electromagnet? How can we make an electromagnet? Question 2 Mention two advantages of electromagnet over a permanent magnet? Question 3 Describe the construction and working of electromagnet? Question 4 What is meant by magnetic effect of current? Question 5 Why do we use iron for making an electromagnet and not steel? Question 6 State few … [Read more...] about Magnetic Effect of Electric Current
Class 7
Heating Effect of Electric Current
Question 1 What is meant by heating effect of current? Question 2 Name few appliances which work on heating effect of current? Question 3 Explain why filament type electric bulb are not power efficient? Question 4 What will happen if fuse is not inserted in household electric wiring? Question 5 Why any metal wire or metal strip cannot be used in place of fuse … [Read more...] about Heating Effect of Electric Current
Electric Circuit
Question 1 What is an electric circuit? Draw an open and closed circuit? Question 2 What is meant by a battery? How will you arrange two cells to make a battery? Question 3 Give the names and symbols for common electrical components? Question 4 Draw a circuit diagram with an open and closed switch? Question 5 What are storage cells? Electric Current The flow of … [Read more...] about Electric Circuit
Pendulum
Question 1 What is simple pendulum? Question 2 Define the term time period, length of pendulum, oscillations and amplitude of a pendulum? Question 3 What are digital quartz clock? Question 4 What are non-digital quartz clock? Question 5 What are atomic clocks? Question 6 What are pendulum clocks? Simple Pendulum A simple pendulum consists of a small metal … [Read more...] about Pendulum
Time
Question 1 Name the standard units of time? Question 2 Name the devices which were used in ancient times for measuring time? Question 3 How was the time measured in ancient times? Question 4 How sundial helps to find the time during ancient period? Question 5 How sand clock helps to find the time during ancient period? Question 6 How water clock helps to find the … [Read more...] about Time