- Total number of questions: 65
- 30 questions carry one mark each
- 35 questions carry two marks each
- Negative marking: 1/3 of the marks allotted to the question
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Physics (PH) 2017
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Identical charges q are placed at five vertices of a regular hexagon of side a. The magnitude of the electric field and the electrostatic potential at the centre of the hexagon are respectively
A parallel plate capacitor with square plates of side 1 m separated by 1 micro meter is filled with a medium of dielectric constant of 10. If the charges on the two plates are 1 C and -1 C, the voltage across the capacitor is _______ kV. (up to two decimal places). (ε0 = 8.854×10−12 F/m)
Light is incident from a medium of refractive index n = 1.5 onto vacuum. The smallest angle of incidence for which the light is not transmitted into vacuum is _______ degrees. (up to two decimal places).
A monochromatic plane wave in free space with electric field amplitude of 1 V/m is normally incident on a fully reflecting mirror. The pressure exerted on the mirror is _______×10−12 Pa. (up to two decimal places) (ε0 = 8.854×10−12 F/m).
The best resolution that a 7 bit A/D convertor with 5 V full scale can achieve is _______ mV. (up to two decimal places).
In the figure given below, the input to the primary of the transformer is a voltage varying sinusoidally with time. The resistor R is connected to the centre tap of the secondary. Which one of the following plots represents the voltage across the resistor R as a function of time?
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