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Question

The given symbol stands for a/an _________ in an electric circuit.

This question was previously asked in
RRB ALP 2018 CBT 2 Fitter Question Paper (21-Jan-2019) (Shift 3)
The correct answer is

electric bulb

The correct answer is electric bulb.

  Key Points

  • Electric bulb
    • An electric bulb is connected to the circuit. 
    • It glows as the current passes through the circuit. 
    • However, it cannot detect very small currents.

  Additional Information

  • Tungsten:  The metal tungsten is  used for the filaments in bulbs . It has a  high melting point  and retains its strength when heated.
  • Filaments of the light bulbs are made up of the Tungsten element.
  • Its symbol is ‘W’ because of its scientific name ‘Wolfram’ and its atomic number is 74. 
  • Properties of filament:
  1. It should have a very  high melting point.
  2. It  should not burn at room temperature.
  3. It should have  high resistivity.
  •  If the  resistance is less, heat energy is produced is very low  which is  not sufficient for an electric bulb to glow  so the resistance is kept high.
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Similar Questions

  1. Two resistors, one of 12 Ω and the other of 24 Ω, are connected in parallel. This combination is connected in series with a 22 Ω resistor and a 12 V battery. The current in 24 Ω resistor is:

  2. If an electric load draws a current of 2 A for 1 second, then calculate the number of electrons (with charge 1.6 × 10⁻¹⁹ C) passing through the load.

  3. How is a voltmeter connected in a circuit to measure potential difference?

  4. A voltmeter with a resistance of 10,000 ohms is connected across a circuit that has a voltage of 50 V. What is the current flowing through the voltmeter?

  5. An electric lamp with a resistance of 35 ohms and a conductor with a resistance of 6 ohms are connected to an 8 V battery in series. Calculate the current flowing through the circuit.

  6. The ______ across the ends of a resistor is directly proportional to the current through it, provided its temperature remains the same.

  7. Which of the following gives the correct relation between power ‘P’, resistance ‘R’ and charge ‘Q’ flowing through a wire in ‘t’ seconds?

  8. Two resistors of R Ω and 15 Ω are connected in parallel to get an effective resistance of 12 Ω. Find R.

  9. Which of the following correctly describes the direction of electric current?

  10. If an electric heater draws a current of 5 A when the potential difference across its terminals is 75 V, what current will it draw when the potential difference is increased to 150 V?


Important Questions from Current Electricity

  1. Which of the following is a bad conductor of electricity?

  2. In general, in an alternating current circuit

  3. The laws of electromagnetic induction have been used in the construction of a

  4. A 220 volt and 100 watt bulb is connected to a 110 volt source. The power consumption by the bulb is

  5. In the series combination of resistance in current electricity, which of the following is correct?

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