NAT I Engineering Physics

MCQ's Test For NAT I Engineering Physics

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NAT I Engineering Physics

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Question # 1

A 50-volt battery is connected across 10-ohm resistor.The current is 4.5 A.The internal resistance of the battery is

Question # 2

A cable breaks if stretched by more than 2 mm it is cut into two equal parts how much either part can be stretched without breaking?

Question # 3

Which of the following lists of physical quantities consists only of vectors:

Question # 4

The distance between node and anti-node is

Question # 5

Angular momentum is

Question # 6

At a certain instant a stationary transverse wave is found to have maximum kinetic energy the appearance of string of that instant is:

Question # 7

The mass defect for the nucleus of helium is 0.0303 a.m.u What is the binding energy per nucleon for helium in MeV?

Question # 8

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

Question # 9

The dot product of two vectors is negative when

Question # 10

Velocity of sound in a diatomic as is 300 m/sec what is its rms velocity

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NAT-I Physics Chapter 22 Important MCQ's

Sr.# Question Answer
1 When n-type of semiconductor is heated
A. Number of electrons increases while that of holes decreases
B. Number of holes increases while that of electrons decreases
C. Number of electrons and holes remains same
D. Number of electrons and holes increases equally
2 A sun rise or sun set, the sun looks reddish because.
A. The sun is coldest at these times
B. Of the effects of reflection and refraction
C. The sun is hottest at these times
D. Of the scattering of light
3 Band spectrum in produced by
A. H
B. He
C. H2
D. Na
4 The primary winding of transformer has 500 turns whereas its secondary has 5000 turns The primary is connected to an a.c supply of 20 V, 50 Hz The secondary will have an output of
A. 200 V, 50 Hz
B. 2 V, 50 Hz
C. 200 V, 500 Hz
5 Which quantity is increased in step-down transformer?
A. Current
B. Voltage
C. Power
D. Frequency
6 Which one of the following phenomena is not explained by Huygen's construction of wavefront?
A. Refraction
B. Reflection
C. Diffraction
D. Origin of spectra
7 What will be the ratio of the distance moved by a freely falling body from rest in 4th and 5th seconds of journey?
A. 4 : 5
B. 7 : 9
C. 16 : 25
D. 1 : 1
8 Planck's constant has the dimensions of:
A. Energy
B. Momentum
C. Frequency
D. Angular momentum
9 Which of the following particle would experience the largest magnetic force when projected with the same velocity perpendicular to a magnetic field?
A. Proton
B. Electron
C. He+
D. Li+
10 Ultra-violet radiation of 6.2 eV falls on an aluminium surface K.E of fastest electrons emitted is(work function = 4.2 eV)
A. 3.2 x 10-21 J
B. 3.2 x 10-19 J
C. 7 x 10-25 J
D. 9 x 10-32 J

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