NAT II Physical Science Physics With Answers

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NAT II Physical Science Physics

Sr. # Questions Answers Choice
1 Shunt required in an ammeter of resistance R to decrease its deflection from 30 ampere to 10 ampere is R/4 R/3 R/2 R
2 The magnetic moment of a circular coil carrying current is Directly proportional to the length of the wire in the coil Inversely proportional to the length of the wire in the coil Directly proportional to the square of the length of the wire in the coil Inversely proportional to the square of the length of the wire in the coil
3 Choose the correct statement Both an ammeter and voltmeter should have small resistance Both an ammeter and a voltmeter should have large resistance An ammeter should have large resistance and a voltmeter should have small resistance An ammeter should have small resistance and a voltmeter should have large resistance
4 The incorrect statement regarding the lines of force of the magnetic field B is Magnetic intensity is a measure of lines of force passing through unit area held normal to it Magnetic lines of force form a close curve Inside a magnet, its magnetic lines of force move from north pole of a magnet towards its south pole Due to a magnet magnetic lines of force never cut each other
5 The unit of electric current 'ampere' is the amount of current flowing through each of two parallel wires 1 m apart and of infinite length will give rise to a force between them equal to 1 N/m 2 x 10<sup>-7</sup>N/m 1 x 10<sup>-2</sup>N/m 4 x 10<sup>2</sup>N/m
6 A moving charge will gain energy due to the application of Electric field Magnetic field Both of these None of these
7 If a diamagnetic substance is brought near north or south pole of a bar magnet it is Attracted by the poles Repelled by the poles Repelled by north pole and attracted by the south pole Attracted by the north pole and repelled by the south pole
8 A voltmeter has resistance of 2000 ohms and it can measure up to 2V. If we want to increase its range to 10V then required resistance in series will be 2000 ohm 4000 ohm 6000 ohm 8000 ohm
9 In a voltmeter the conduction takes place due to Electrons only Holes only Electrons and holes Electrons and ions
10 A conducting wire is drawn to double its length. Final resistivity of the material will be Double of the original one Half of the original one One-fourth of the original one Same as original one
11 A piece of fuse wire melts when a current of 15 ampere flows through it.
With this current, if it dissipates 22.5 W, the resistance of fuse wire will be
 Zero 10 ohm 1 ohm 0.10 ohm
12 The conductivity of a superconductor is Infinite Very large Very small Zero
13 If 2.2 kilowatt power is transmitted through a 10 ohm line at 22000 volt, the power loss in the form of heat will be 0.1 watt 1 watt 10 watt 100 watt
14 A 50-volt battery is connected across 10-ohm resistor. The current is 4.5 A. The internal resistance of the battery is Zero 0.5 ohm 1.1 ohm 5.0 ohm
15 A (100 W, 200 V) bulb is connected to a 160 V power supply. The power consumption would be 64 W 80 W 100 W 125 W
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