1. CONCISE Physics - Middle School - 8
2. Physical Quantities and Measurement
3. Force and Pressure
5. Light Energy
6. Heat Transfer
1. Objective Questions - I
2. Short/Long Answer Questions - I
3. Objective Questions - II
4. Short/Long Answer Questions - II
Q1) From where does the electricity come to our home?
Q2) What is an electric meter? Where is it fixed in our house?
Q3) State the purpose of kWh meter.
Q4) For which unit do we pay our electricity bill?
Q5) How can you check just by seeing the meter whether the electricity is in use or not?
Q6) The diagram below in the figure shows the reading on the dials of a meter. State what is its reading.
Q7) One day the meter reading is found to be 7643 units while next day, it was 7657 units. What is the consumption of electricity in a day?
Q8) A source of potential difference V volt sends current I ampere in a circuit for time t second.
(a) Write expressions for electrical energy supplied by the source.
(b) Write expressions for electrical power spent by the source.
Q9) Name the unit in which you pay the cost of your electricity bill. How is it related to joule?
Q10) In an appliance of power P watt is used for time 1 hour. How much electrical energy is consumed in kWh.
Q11) What is an electric fuse? State its purpose in the household electric circuit.
Q12) State one property of the material of a fuse wire.
Q13) Name the material of a fuse wire.
Q14) Can we use copper wire as fuse wire? Give reason.
Q15) How does a fuse protect the electric wiring (or an appliance) from being damaged?
Q16) Which fuse wire is thick: 5A or 15A?
Q17) Write the full form of M.C.B.
Q18) How is MCB superior to the fuse wire?
Q19) With which wire: live or neutral is the fuse wire connected?
Q20) What do you mean by short circuiting of a circuit?
Q21) Figure shows two ways of connecting the three bulbs A, B and C to a battery. Name the two arrangements. Which of them do you prefer to use in a household circuit? Give a reason to support your answer.
Q22) How are the electrical appliances connected in a house circuit: in series or in parallel? Give reason.
Q23) In the household electric circuit, if one bulb is fused in a room, the other bulbs keep glowing. Explain the reason.
Q24) State the voltage at which electricity is supplied to our houses.
Q25) Draw a labelled diagram with the necessary switches to connect a bulb, a fan and a plug socket in a room with the mains. In what arrangement will you connect them to the mains?
Q26) State the colour coding of the three wires in a cable used wiring in a household electrical circuit.
Q27) Why is the metal covering of an electrical appliance earthed?
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CONCISE Physics - Middle School - 8
Physical Quantities and Measurement
Force and Pressure
Objective Questions - I
Short/Long Answer Questions - I
Objective Questions - II
Short/Long Answer Questions - II
Race To Space
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