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41. A heater coil is cut into two equal parts and only one part is now used in the heater instead of the original one. Heat generated by one half of the coil would be how much in comparison to that of the full length coil?(NTSE Odisha, Stage-I, 2014-15)
4 times
2 times
Half
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42. A student carries out an experiment and plots the V-I graph of three samples of Nicrome wire with resistance R1, R2 and R3 respectively. Which of the following is true? (NTSE Chandigarh, Stage-I, 2014-15)
R1 = R2 = R3
R1 > R2 > R3
R3 > R2 > R1
R2 > R3 > R1
43. While doing their experiment on finding the equivalent resistance of two resistors connected in series, the students A, B and C set up their circuits as shown. The correct set up is that of (NTSE Chandigarh, Stage-I, 2014-15)
Students A and B
Students Band C
Students C and A
All the three students
44. A wire of resistance R is stretched to twice of its original length. Its new resistance will be (NTSE Delhi, Stage-I, 2014-15)
4R
2R
45. In any electrical circuit, the direction of flow of current is (NTSE Tamil Nadu, Stage-I, 2014-15)
Same as that of the flow of electrons
Opposite to the flow of electrons
Parallel to the flow of electrons
Stationary
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