- AA
- BB
- CC
- DAll have equal masses.
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Which one of the following phenomena is not explained by Huygen's construction of wavefront
|
(a) Refraction |
(b) Reflection |
(c) Diffraction |
(d) Origin of spectra |
A dip needle vibrates in the vertical plane perpendicular to the magnetic meridian. The time period of vibration is found to be 2 seconds. The same needle is then allowed to vibrate in the horizontal plane and the time period is again found to be 2 seconds. Then the angle of dip is
|
(a) 0o |
(b) 30o |
(c) 45o |
(d) 90o |
A capacitor with air as the dielectric is charged to a potential of 100 volts. If the space between the plates is now filled with a dielectric of dielectric constant 10, the potential difference between the plates will be
|
(a) 1000 volts |
(b) 100 volts |
(c) 10 volts |
(d) Zero |
The charge on a capacitor of capacitance 10 μF connected as shown in the figure is

|
(a) 20 μC |
(b) 15 μC |
(c) 10 μC |
(d) Zero |
The spectrum of radiation 1.0
is in the infrared region. The energy of one photon of this in joules will be
|
(a) 6.62 |
(b) 6.62 |
(c) |
(d) 3 |