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Accelerate NEET 2020: Current Electricity Class 3 (15.10.2019)
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Question 1
When a 20 m long wire having resistance 15 Ω is uniformly stretched by 50%, then what will be the change in resistance?
Question 2
The voltage and current ratings of a mobile phone charger are 5 V & 2 A respectively. Now, if we replace the resistor of the charger with another resistor having thrice the resistance and keep the voltage same, then what will be the new current rating of charger?
Question 3
If a current of 4 A is passed through an electric bell having internal resistance of 10 Ω, then at what voltage the bell would ring perfectly?
Question 4
What will be the approximate resistance setting of a rheostat in which 350 mA of current flows with a 300 V source?
Question 5
What will be the percentage change in resistance of a wire, if it is stretched in Universal Testing Machine in order to change its diameter by 0.5%?
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Oct 15NEET & AIIMS
