Four equal capacitors, each of capacity C, are arranged as shown. The effective capacitance between A and B is

|
(a) |
(b) |
(c) |
(d) C |
Four equal capacitors, each of capacity C, are arranged as shown. The effective capacitance between A and B is

|
(a) |
(b) |
(c) |
(d) C |
(c)
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Which of the following could not produce a virtual image
|
(a) Plane mirror |
|
(b) Convex mirror |
|
(c) Concave mirror |
|
(d) All the above can produce a virtual image |
The third line of Balmer series of an ion equivalent to hydrogen atom has wavelength of 108.5 nm. The ground state energy of an electron of this ion will be
|
(a) 3.4 eV |
(b) 13.6 eV |
(c) 54.4 eV |
(d) 122.4 eV |
Magnetic induction is a
|
(a) Scalar quantity |
(b) Vector quantity |
(c) Both (a) and (b) |
(d) None of the above |
Heat produced in a wire of resistance R due to current flowing at constant potential difference is proportional to
|
(a) |
(b) |
(c) R |
(d) |
Electric room radiator which operates at 225 volts has resistance of 50 ohms. Power of the radiator is approximately
|
(a) 100 W |
(b) 450 W |
(c) 750 W |
(d) 1000 W |
In the connections shown in the adjoining figure, the equivalent capacity between A and B will be

|
(a) 10.8 μF |
(b) 69 μF |
(c) 15 μF |
(d) 10 μF |