NAT I Computer Science Physics With Answers

image
image
image

NAT I Computer Science Physics

Sr. # Questions Answers Choice
1 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 Ω 1 Ω 0.10 Ω
2 The conductivity of a superconductor is Infinite Very large Very small Zero
3 If 2.2 kilowatt power is transmitted through a 10 ohm line at 22000 volt, the power loss in he form of heat will be 0.1 watt 1  watt 10 watt 100 watt
4 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 Ω 1.1 Ω 5.0 Ω
5 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
6 Two electric bulbs of 200 W and 100 W have same voltage.If R1 and R2 be their resistance respectively then R<sub>1</sub> = 2R<sub>2</sub> <span style="font-size: 14.44444465637207px;">R</span><sub>2</sub><span style="font-size: 14.44444465637207px;">&nbsp;= 2R</span><sub>1</sub> <span style="font-size: 14.44444465637207px;">R</span><sub>2</sub><span style="font-size: 14.44444465637207px;">&nbsp;= 4R</span><sub>1</sub> <span style="font-size: 14.44444465637207px;">R</span><sub>1</sub><span style="font-size: 14.44444465637207px;">&nbsp;= 4R</span><sub>2</sub>
7 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
8 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 10-19 N is 25 225 625 1250
9 Two points charges A and B separated by a distance R attract each other with a force of 12 x 10-3 N. 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
10 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
Download This Set
×