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A potentiometer consists of a wire of length 4 m and resistance 10Ω. It is connected to a cell of e.m.f. 2 V. The potential difference per unit length of the wire will be
|
(a) 0.5 V/m |
(b) 2 V/m |
(c) 5 V/m |
(d) 10 V/m |
Two conductors made of the same material are connected across a common potential difference. Conductor A has twice the diameter and twice the length of conductor B. The power delivered to the two conductors 
and 
respectively is such that 
equals to
|
(a) 0.5 |
(b) 1.0 |
(c) 1.5 |
(d) 2.0 |
Four capacitors of each of capacity 3μF are connected as shown in the adjoining figure. The ratio of equivalent capacitance between A and B and between A and C will be
|
(a) 4 : 3 |
(b) 3 : 4 |
(c) 2 : 3 |
(d) 3 : 2 |
Positive rays consists of
|
(a) Electrons |
(b) Neutrons |
|
(c) Positive ions |
(d) Electro magnetic waves |