VITEEE Sample Paper Physics

VITEEE Sample Questions PHYSICS 1. A rain drop of mass 0.1 g is falling with uniform speed of 10 cm/s. What is the net weight of the drop? [g = 10 m/s 2] A) 0 N B) 2 × 10−3 N C) 10−2 N D) 10−3 N 2. The equation of state corresponding to 8 g of O2 (assume ideal gas) is A) PV = 8RT B) PV = RT/4 C) PV = RT/2 D) PV = RT/8 3. Two very large sheets of plastic are facing each other with a distance 'd' between them. By rubbing them with wool and silk, the sheet on the left gets a uniform surface charge density n1 = −n0 and the other sheet on the right gets n2 = 3n0 , where n0 > 0. What is the magnitude and direction of the electric field in the region between the two sheets? A) n0 /𝜀0 , left B) n0 /𝜀0 , right C) 2n0 /𝜀0 , left D) 2n0 /𝜀0 , right 4. The wire in the potentiometer has a resistance of R0 and the potentiometer is connected to a battery of voltage 'V'. Now a resistor 'R' whose value of resistance has to be measured is connected. When the sliding point is exactly in the middle of the potentiometer, the voltage drop across 'R' is V/4. What is the value of R/R0? A) 1/4 B) 4 C) 2 D) 1/2 5. A charge of 1 C is placed at one end of a non-conducting rod of radius 0.4 m. The rod is rotated in a vertical plane about a horizontal axis passing through the other end of the rod with an angular frequency 2𝜋 × 104 rad/sec. The magnetic field at a point on the axis of rotation at a distance 1 m from the center of the path is A) 5.75 × 10−5 T B) 6.88 × 10−5 T C) 7.25 × 10−5 T D) 8.08 × 10−5 T 6. In an LCR series circuit, the voltage across each of the components L, C and R is 50 V. The voltage across the LC combination will be A) 50 V B) 10 V C) 0 V D) 30 V 7. A convex meniscus lens is made from glass with refractive index n = 1.52. If the radius of curvature of the convex surface is 20 cm and that of the concave surface is 40 cm, then find out the focal length. A) 129 cm B) 94 cm C) 80 cm D) 113 cm 8. The work function of cesium is 2.14 eV. The threshold frequency for cesium is A) 5.16 × 1014 Hz B) 3.20 × 1014 Hz C) 2.14 × 1014 Hz D) 6.50 × 1014 Hz 9. The half life of radium is 1600 years. After how many years 25% of a radium block will remain undecayed? A) 3200 years B) 1500 years C) 2000 years D) 5200 years 10. Intrinsic Si at 300 K has equal electron (𝑛𝑒 ) and hole (𝑛ℎ ) concentrations of 1.5 × 1016 𝑚−3. Doping by indium increases 𝑛ℎ to 4.5 × 1022 𝑚−3. The value of 𝑛𝑒 in the doped Si is A) 5.0 × 109 𝑚−3 B) 1.0 × 109 𝑚−3 C) 8.0 × 109 𝑚−3 D) 4.0 × 109 𝑚−3