- AOn heating with ac
- BOn heating with de
- ✓Same in both
- DNone of the above two
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How does the red shift confirms that the universe is expanding
|
(a) Due to Wien's law |
(b) Due to Stefan's law |
|
(c) Due to Kirchhoff's law |
(d) Due to Doppler's effect |
A pencil dipped partially in water appears bent because of:
The slit of a collimator is illuminated by a source as shown in the adjoining figures. The distance between the slit S and the collimating lens L is equal to the focal length of the lens. The correct direction of the emergent beam will be as shown in figure

|
(a) 1 |
(b) 3 |
|
(c) 2 |
(d) None of the figures |
The magnetic field due to a straight conductor of uniform cross section of radius a and carrying a steady current is represented by
|
(a) |
(b) |
(c) |
(d) |
A nucleus ruptures into two nuclear parts which have their velocity ratio equal to 2 : 1. What will be the ratio of their nuclear size (nuclear radius)
|
(a) |
(b) 1 : |
(c) |
(d) 1 : |
A parallel plate condenser with oil between the plates (dielectric constant of oil K = 2) has a capacitance C. If the oil is removed, then capacitance of the capacitor becomes
|
(a) |
(b) 2C |
(c) |
(d) |
A circular coil of 500 turns of wire has an enclosed area of
per turn. It is kept perpendicular to a magnetic field of induction 0.2 T and rotated by 180° about a diameter perpendicular to the field in 0.1 sec. How much charge will pass when the coil is connected to a galvanometer with a combined resistance of 50 ohms
|
(a) 0.2 C |
(b) 0.4 C |
(c) 2 C |
(d) 4 C |