What does the given symbol represent in an electric circuit diagram?
A wire joint
In a standard circuit diagram, a solid filled dot drawn at the point where two conducting lines meet is used to show that the wires are electrically connected at that node, i.e. a wire joint.
Variable resistance (rheostat) is drawn as a resistor rectangle with an arrow through it, so that symbol does not fit.
A plug key or switch is shown as a break in the line with a small circle or a lever, not as a dot.
When two wires simply cross without joining, either a small hop (semicircle) is drawn or the crossing is shown without any dot at all.
Hence, the symbol represents a wire joint.
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Important Questions from Current Electricity
- In a parallel combination of resistors, which of the following quantities remains the same across all the resistors?
- Which of the following statements is/are true for a domestic circuit?
(i) All the appliances are connected in parallel.
(ii) The live wire in the domestic circuit has green insulation on it.
(iii) A fuse connected to the circuit allows excessive current to pass through the appliances.
(iv) The neutral wire in the domestic circuits has black insulation on it. A science teacher asks students to measure the current through a bulb using an ammeter. What precaution must the students follow?
- Which characteristic of parallel circuits makes them advantageous over series circuits for connecting multiple electrical gadgets in a house?
- In a domestic electric circuit, the main purpose of a FUSE is ________.
