Advertisements
Advertisements
Question
What do the following symbols mean in circuit diagrams?
Solution
Variable resistance or rheostat. A rheostat is used to change the resistance in a circuit.
APPEARS IN
RELATED QUESTIONS
Draw circuit symbols for variable resistance
Draw the labelled diagram of an electric circuit comprising of a cell, a resistance, an ammeter, a voltmeter and a closed switch (or closed plug key). Which of the two has a large resistance : an ammeter or a voltmeter?
Match the column ‘A’ with column ‘B’.
|
Column ‘A’
|
Column ‘B’ |
|
(1) Eka - boron
|
(a) Germanium
|
|
(2) Eka - Aluminium
|
(b) Scandium
|
|
(3) Eka - Silicon
|
(c) Gallium |
What is the potential difference?
Tabulate the different components of an electric circuit and their respective symbols.
Rahul wants to make an electric circuit. He has a bulb, two wires, a safety pin, and a piece of copper. He does not have any electric cell or battery. Suddenly he gets some idea. He uses lemon instead of a battery and makes a circuit. Will the bulb glow?
Study the electric circuit below. Which of the following switches should be closed so that only two bulbs will light up
Three bulbs are connected end to end from the battery. This connection is called _______.
Choose the statement which is not correct in the case of an electric fuse.
