Which of the following has negative temperature coefficient of resistivity?
Anonymous Quiz
16%
Metal
27%
Metal and semiconductor
41%
Semiconductor
16%
Metal and alloy
Tow parallel conductors carrying current of 4.0 A and 10.0 A are placed 2.5 cm apart in vacuum. The force per unit length between them is:
Anonymous Quiz
22%
6.4 x 10-5 N/m
43%
6.4 x 10-12 N/m
23%
4.6 x 10-4 N/m
13%
3.2 x 10-4 N/m
If an ammeter is to be used in place of a voltmeter, then we mush connect with the ammeter a:
Anonymous Quiz
33%
Low resistance in parallel
32%
Low resistance in series
24%
High resistance in parallel
12%
High resistance in series
The magnetic field at the centre of a current carrying circular loop of radius R, is B1. The magnetic field at a point on its axis at a distance R from the centre of the loop is B2. Then the ratio (B1/B2) is:
Anonymous Quiz
25%
2 under root 2
40%
1 upon under root 2
23%
under root 2
12%
2
The self-inductance of a solenoid of 600 turns is 108 mH. The self-inductance of a coil having 500 turns with the same length, the same radius and the same medium will be:
Anonymous Quiz
31%
95 mH
42%
90 mH
20%
85 mH
8%
75 mH
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