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प्रश्न
An electrical gadget can give an electric shock to its user under certain circumstances. Mention any two of these circumstances.
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उत्तर
When the live wire comes in contact with the metal body of the electrical gadget.
संबंधित प्रश्न
If the charge on an electron is 1.6 × 10−19 coulombs, how many electrons should pass through a conductor in 1 second to constitute 1 ampere current?
If the lamps are both the same in the figure given below and if A1 reads 0.50 A, what do A2, A3, A4 and A5 read?
What happens to the other bulbs in a parallel circuit if one bulb blows off?
The following circuit diagram shows three resistors 2 Ω, 4 Ω and R Ω connected to a battery of e.m.f 2V and internal resistance 3 Ω. If the main current of 0.25 A flows through the circuit, find:
- the p.d. across the 4 Ω resistors,
- the p.d. across the internal resistance of the cell,
- the p.d. across the R Ω or 2 Ω resistors, and
- the value of R.
Explain with the help of a diagram how does 'short circuiting' occur in an electric kettle.
Problems for practice:
If 3A current flows through a circuit, then convert the current in terms of a milliampere.
