- ABiot-Savart law.
- BCoulomb’s law
- CFaraday’s law.
- DKirchhoff’s law.
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Focal length of a convex lens of refractive index 1.5 is 2 cm. Focal length of lens when immersed in a liquid of refractive index of 1.25 will be
|
(a) 10 cm |
(b) 2.5 cm |
(c) 5 cm |
(d) 7.5 cm |
In the circuit diagram shown in the adjoining figure, the resultant capacitance between P and Q is

|
(a) 47 μF |
(b) 3 μF |
(c) 60 μF |
(d) 10 μ F |
The typical ionisation energy of a donor in silicon is
|
(a) 10.0 eV |
(b) 1.0eV |
(c) 0.1 eV |
(d) 0.001 eV |
For non-conductors, the energy gap is
|
(a) 6 eV |
(b) 1.1 eV |
(c) 0.8 eV |
(d) 0.3 eV |
$\text{3V}\cos\theta$
$2\text{V}\cos\theta$
$\frac{3}{2}\text{V}\cos\theta$
$\text{V}\cos\theta$
A wheel with ten metallic spokes each 0.50 m long is rotated with a speed of 120 rev/min in a plane normal to the earth’s magnetic field at the place. If the magnitude of the field is 0.4 Gauss, the induced e.m.f. between the axle and the rim of the wheel is equal to
|
(a) |
(b) |
(c) 1.256 |
(d) 6.28 |