Question
If a resistive wire is uniformly stretched, what will be a change in its resistance?
✓
Answer
- Its resistance will increase.
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→$\qquad$Prashant, one of the children, suddenly put his ear to the line and tried to know whether a train is coming or not. He knew a train is coming. He asked his friends to inform the railway cabin crew and he himself put off his red shirt and started running towards the train, waving his red shirt. The driver and cabin man got the alert signal in time and thus a major accident was averted.
(1) Name the two physical phenomena of science used by Prashant.
(2) Why did Prashant use his red shirt instead of any other coloured shirts?
(3) What moral values do you learn from Prashant?
Name the current-carrying conductor, whose magnetic field is represented by the following diagram :
