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Question 1.
The heating element of the heater is made up of alloy which has very high resistance so when current flows through the heating element, it becomes too hot and glows red. But the resistance of cord which is usually of copper and aluminum is very low so it doesn't glow.
Question 2.
Right hand thumb rule is used to determine the direction of magnetic field produced around a straight current carrying conductor
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Answer:
1. Because the electric cord is not made up off pure metal so it does not glow after heating.
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