VSAQ for Chapter 3 Electricity: Circuits and their Components Class 7 Science NCERT
Important Questions1
Q1: Circuit diagram is a simplified conventional pictorial representation of an_______________
Answer
Electrical circuit
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2
Q2: A circuit diagram uses standard symbols for electric components. True/ False.
Answer
True.
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3
Q3: Define electric circuit.
Answer
A closed path formed by connecting electrical components allows electric current to flow. This arrangement is known as an electric circuit.
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4
Q4: What is a cell holder?
Answer
A compartment that holds two or more cells together to form a battery is called a cell holder.
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5
Q5: The combination of two or more cells is called a __________________.
Answer
Battery
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6
Q6: A circuit is said to be open circuit or complete when current flows through it. True/ False.
Answer
False
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7
Q7: What is a battery?
Answer
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.
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8
Q8: The symbol for a battery is
a.
b.
c.
d. None of These
a.
b.
c.
d. None of These
Answer
C.
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9
Q9: Draw the symbol for an electric bulb in an electric circuit.
Answer
Symbol of an Electric bulb
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10
Q10: What is a circuit diagram?
Answer
A circuit diagram is a simplified representation of an electrical circuit using symbols to depict various components.
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11
Q11: Why do we use copper wires in electrical circuits?
Answer
Copper is a good conductor of electricity, which allows the current to flow easily through the wires.
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12
Q12: A Longer line in the symbol for a cell represents its ------- terminal.
Answer
Positive
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13
Q13: What is an electric circuit?
Answer
Electric Circuit: The closed path in which electric current flows.
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14
Q14: What happens when the current is switched ‘on’ in a room heater?
Answer
It becomes red hot and gives out heat.
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15
Q15: Would any of the bulbs glow when the switch is in the ‘OFF’ position in a circuit?
Answer
No, the bulb will not glow when the switch is "OFF" because there is no closed circuit for current to flow.
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16
Q16: What type of electricity is used in homes and industries?
Answer
Alternating Current (AC).
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17
Q17: What happens if the filament in an incandescent lamp breaks?
Answer
The lamp stops glowing because the circuit is broken.
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18
Q18: How does a torchlight produce light?
Answer
By passing current through a lamp powered by electric cells.
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19
Q19: What is the purpose of using insulators in circuits?
Answer
To prevent electric shocks and ensure safety.
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20
Q20: What material is used to make the body of most electric cells?
Answer
Metal.
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21
Q21: What direction does current flow in a circuit?
Answer
From the positive terminal of the cell to the negative terminal.
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