Understanding Circuit Symbols and Components

The video tutorial covers essential circuit symbols and components needed for understanding current electricity. It explains the function of a cell, battery, and the importance of connecting them with leads. The tutorial also discusses various types of resistors, including variable resistors, thermistors, and light-dependent resistors (LDRs). Additionally, it introduces tools like ammeters and voltmeters for measuring electricity, and briefly mentions diodes and fuses.

What is formed when two or more cells are combined?

• A switch

• A resistor

• A diode

• A battery

Which component is used to turn a circuit on and off?

• A cell

• A lead

• A switch

• A bulb

What does a rectangle symbol in a circuit represent?

• A resistor

• A switch

• A battery

• A diode

Which type of resistor changes resistance with temperature?

• Variable resistor

• Thermistor

• LDR

• Diode

What does an LDR depend on to change its resistance?

• Voltage

• Light

• Heat

• Current

Which instrument is used to measure current in a circuit?

• Ammeter

• Voltmeter

• LDR

• Thermistor

What is the purpose of a voltmeter in a circuit?

• To measure current

• To measure resistance

• To measure voltage

• To measure light intensity