The current in the electric bulb of 100 W and 200 V electric circuit is _____.
- A5 A
- ✓0.5 A
- C50 A
- D500 A.
Answer: B.
View full solution →Question types
Electricity question types
82 questions across 7 question groups — pick any mix to generate a Science paper with step-by-step answer keys.
82
Questions
7
Question groups
5
Question types
01
Choose the most appropriate answer from the given alternatives and write the option code and the corresponding answer.
32 Q→02Fill in the blank
21 Q→03True-False
3 Q→04[1 Mark Questions]
8 Q→05[2 Mark Questions]
11 Q→06[4 Mark Questions]
2 Q→07Match The Following.
5 Q→Sample Questions
Electricity questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
When resistances are connected in parallel current is more as effective resistance is:
- Amaximum
- ✓less
- Cmore
- Dminimum
Answer: B.
View full solution →One way of overcoming the energy crisis is to use more _______ bulbs.
- Afilament
- Bglass
- CLCD
- ✓LED.
Answer: D.
View full solution →The colour of the LED will depend on the type of _____ used.
- Acircuit
- ✓materials
- Cdisplay
- Dsegment.
Answer: B.
View full solution →What is the unit of conductivity?
- Aohm m-1
- Bmho m
- Cohm m
- ✓mho m-1
Answer: D.
View full solution →A _____ is the display device used to give an output in the form of _____.
An array of LEDs act as ______.
LCD is _____.
LED is _____.
The important components of main box are _____ and _____.
The fuse wire is made up of a material whose melting point is relatively high.
Nichrome is an alloy of copper and chromium.
When resistors are connected in series, a current is less as effective resistance is more.
Define electric current.
Define one kilowatt-hour? Give its value?
Define the unit of electric power.
What is the relationship between conductance and resistance? State the Unit of conductance.
Draw a graph between V and I for a conductor by ohm’s law?
Find the effective resistance between A and B in the given circuit.
Calculate the resistivity of the material of wire $10$ m long, $0.4$ mm in diameter and having a resistance of $20\ Ω.$
View full solution →How many electrons pass through a lamp in one minute, if the current is 300 mA?
Show that one ampere is equivalent to a flow of 6.25 × 1018 elementary charges per second.
What is the unit of resistance? Define its unit of resistance is ohm.
Explain the parallel connection of series resistors.
Explain the series connection of parallel resistors.
| 1. ρ=RAl | (a) watt |
| 2. σ=1ρ | (b) Ωm |
| 3. E = P × t | (c) coulomb |
| 4. P = VI | (d) $m ^{-1} \Omega^{-1}$ |
| 5. q = It | (e) Kilowatt-hour |
| 1. Ammeter | (a) To measure resistance |
| 2. Voltmeter | (b) Direction of current |
| 3. Galvanometer | (c) To measure voltage |
| 4. Ohmmeter | (d) To measure current |
| 1. Power | (a) V = IR |
| 2. Joule’s law | (b) ρ=RAl |
| 3. Ohm’s law | (c) P = VI |
| 4. Specific Resistance | (d) I = Qt |
| 5. Electric energy | (e) $H = I^2$ |
| 1. LED | (a) heating device |
| 2. Fuse wire | (b) alloy |
| 3. Tungsten | (c) semiconductor device |
| 4. Nichrome | (d) Filament |
| 5. Electric heater | (e) MCB |
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