Q1: Circuit diagram is a simplified conventional pictorial representation of an_______________
Ans: Electrical circuit
Q2: A circuit diagram uses standard symbols for electric components. True/ False.
Ans: True.
Q3: Define electric circuit.
Ans: A closed path formed by connecting electrical components allows electric current to flow. This arrangement is known as an electric circuit.
Q4: What is a cell holder?
Ans: A compartment that holds two or more cells together to form a battery is called a cell holder.
Q5: The combination of two or more cells is called a __________________.
Ans: Battery
Q6: A circuit is said to be open circuit or complete when current flows through it. True/ False.
Ans: False
Q7: What is a battery?
Ans: A combination of two or more cells connected together is called a battery. It is formed by connecting the positive terminal of one cell to the negative terminal of another.
Q8: The symbol for a battery is
a.
b.
c.
d. None of These
Ans: C
Q10: Draw the symbol for an electric bulb in an electric circuit.
Ans: Symbol of Electric bulb
Q9: What is a circuit diagram?
Ans: A circuit diagram is a simplified representation of an electrical circuit using symbols to depict various components.
Q10: Why do we use copper wires in electrical circuits?
Ans: Copper is a good conductor of electricity, which allows the current to flow easily through the wires.
Q11: A Longer line in the symbol for a cell represents its ——- terminal.
Ans: Positive
Q12: What is an electric circuit?
Ans: Electric Circuit: The closed path in which electric current flows.
Q13: What happens when the current is switched ‘on’ in a room heater?
Ans: It becomes red hot and gives out heat.
Q14: Would any of the bulbs glow when the switch is in the ‘OFF’ position in a circuit?
Ans: No, the bulb will not glow when the switch is “OFF” because there is no closed circuit for current to flow.
Q15: What type of electricity is used in homes and industries?
Ans: Alternating Current (AC).
Q16: What happens if the filament in an incandescent lamp breaks?
Ans: The lamp stops glowing because the circuit is broken.
Q17: How does a torchlight produce light?
Ans: By passing current through a lamp powered by electric cells.
Q18: What is the purpose of using insulators in circuits?
Ans: To prevent electric shocks and ensure safety.
Q19: What material is used to make the body of most electric cells?
Ans: Metal.
Q20: What direction does current flow in a circuit?
Ans: From the positive terminal of the cell to the negative terminal.