NAT II Physical Science Physics With Answers

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NAT II Physical Science Physics

Sr. # Questions Answers Choice
1 A wire of radius r has resistance R, It it is stretched to a wire of r/2 radius, then the resistance becomes 2R 4R 16R Zero
2 Two electric bulbs of 200 W and 100 W have same voltage. If R1and R2be their resistance respectively then R<sub>1</sub>=2R<sub>2</sub> R<sub>2</sub>=2R<sub>1</sub> R<sub>2</sub>=4R<sub>1</sub> R<sub>1</sub>=4R<sub>2</sub>
3 A ten-ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts: 1310 W 670 W 810 W 1210 W
4 The excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart, with force of repulsion between the spheres to be 10-19N, is 25 225 625 1250
5 Two point charges A and B separated by a distance R attract each other with a force of 12 x 10-3N. The force between A and B when the charges on them are doubled and distance is halved 1.92 N 19.2 N 12 N 0.192 N
6 A charge Q is divided into two parts q and Q - q and separated by a distance R. The force of repulsion between them will be maximum when: q = Q/4 q = Q/2 q = Q None of these
7 A point charge Q is placed at the mid-point of a line joining two charges, 4q and q. If the net force on charge q is zero, then Q must be equal to -q +q -2q +4q
8 In a Millikan's oil drop experiment the charge on an oil drop is calculated to be 6.35 x 10-19C. The number of excess electrons on the drop is 3.9 4 4.2 6
9 The force between two charges 0.06 m apart is 5 N. If each charge is moved towards the other by 0.01 m, then the force between them will become 7.20 N 11.25 N 22.50 N 45.00
10 What is the average energy of N molecules of monoatomic gas? 1/2 NKT NKT 3/2 NKT 5/2 NKT
11 At 0°K which of the following properties of a gas will be zero? Kinetic energy Potential energy Vibrational energy Density
12 The product of the pressure and volume of an ideal gas is A constant Approximately equal to the universal gas constant Directly proportional to its temperature Inversely proportional to its temperature
13 Boyle's law is applicable in Isochoric process Isothermal process Isobaric process Isotonic process
14 Absolute temperature can be calculated by Mean square velocity Motion of the molecule Both A and B None of these
15 Which of the following is not thermo dynamical function? Enthalpy Work done Gibb's energy Internal energy
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