In the above question, the resistance between the square faces is
|
(a) 3 |
(b) 3 |
(c) 3 |
(d) 3 |
In the above question, the resistance between the square faces is
|
(a) 3 |
(b) 3 |
(c) 3 |
(d) 3 |
(d) 3
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Electric field intensity at a point in between two parallel sheets with like charges of same surface charge densities (σ) is
|
(a) |
(b) |
(c) Zero |
(d) |
The mass of a substance liberated when a charge ‘q’ flows through an electrolyte is proportional to
|
(a) q |
(b) 1/q |
(c) |
(d) 1/ |
If resistance of voltmeter is 10000 W and resistance of ammeter is 2 W then find R when voltmeter reads 12V and ammeter reads 0.1 A
|
(a) 118 W |
(b) 120 W |
(c) 124 W |
(d) 114W |
Three equal resistances each of value R are joined as shown in the figure. The equivalent resistance between M and N is
|
(a) R |
(b) 2R |
(c) |
(d) |
Broadcasting antennas are generally
|
(a) Omnidirectional type |
(b) Vertical type |
(c) Horizontal type |
(d) None of these |
An infinitely long, straight conductor AB is fixed and a current is passed through it. Another movable straight wire CD of finite length and carrying current is held perpendicular to it and released. Neglect weight of the wire

|
(a) The rod CD will move upwards parallel to itself |
|
(b) The rod CD will move downward parallel to itself |
|
(c) The rod CD will move upward and turn clockwise at the same time |
|
(d) The rod CD will move upward and turn anti –clockwise at the same time |
If a slab of insulating material 4 thick is introduced between the plates of a parallel plate capacitor, the separation between plates has to be increased by 3.5
to restore the capacity to original value. The dielectric constant of the material will be
|
(a) 6 |
(b) 8 |
(c) 10 |
(d) 12 |