SMART INSTITUTE NMDCAT PHYSICS-3 TS
SMART Institute NMDCAT Physics Quiz - Level 3
Test your knowledge with our comprehensive quiz covering fundamental concepts in physics as they relate to the NMDCAT syllabus. This quiz consists of 35 carefully crafted multiple-choice questions designed to challenge your understanding and reinforce your learning.
Key Features:
- 35 Multiple Choice Questions
- Covers important physics topics
- Instant feedback on answers
1-The magnetic induction B is also called the
Flux
Density
Flux density
Tesla
2-Which quantity is increased in step-down transformer?
Current
Voltage
Power
Frequency
3-A straight copper wire is moved in a uniform magnetic field such that it cuts the magnetic lines of force. Then
Emf will not be induced
Emf will be induced
Sometimes emf will be induced and sometimes not
Nothing can be predicted
4-When a coil of cross-sectional area A and number of turns N is rotated in a uniform magnetic field B with an angular velocity w, then the maximum emf induced in the coil will be
BNA
Baw/N
BNAw
Zero
5-Which remains constant in a transformer?
Current
Power
Potential
Frequency
6-Which of the following does not affect the magnitude of induce emf in electromagnetic induction?
The strength of the magnetic field linkage the cell
The resistance of the coil cutting the magnetic field
The speed with which the coil cuts the magnetic field
The number of turns in the coil
7-The ratio of the secondary to the primary turns in a transformer is 3:2 and the output power is P. Neglecting all power losses, the input power must be:
P/2
2P/3
P
3P/2
8-In a half wave wave rectifier, the frequency of the input is N, the frequency and form of output will be
N/2 and pulsating
N and pulsating
2N and steady
N and continuous
9-The most common device used as a filter in rectification is
Capacitor
Resistor
Transformer
Transistor
10-Rectification is possible by
Transistor
Amplifier
Diode
Capacitor
11-The diodes works on
A.C
D.C
Both A and B
None of these
12-If no external voltage is applied across P-N junction, there would be
No electric field across the junction
An electric field pointing from P-type to N-type side across the junction
An electric field pointing from N-type to P-type side across the junction
A temporary electric field during formation of P-N junction that would subsequently disappear
13-Diode can work as
Oscillator
Generator
Transformer
Rectifier
14-The semiconductor diode can be used as a rectifier because
It has low resistance to the current flow when forward biased and high resistance when reverse biased
It has high resistance to the current flow when reversed biased
It has low resistance to the current flow when forward biased
Its conductivity increases with rise of temperature
15-Lyman series of H-atom lie in the ..... Region of EM spectrum.
Visible
Infrared
Ultraviolet
Red
16-The hydrogen atoms are excited to the stationary state designated by the principle quantum number n=4. The number of maximum spectral lines are observed
2
3
4
6
17-The maximum energy of the electrons released in a photo cell is independent of
Frequency of incident light
Intensity of incident light
Nature of cathode rays
None of these
18-Light of frequency 1.5 times the threshold frequency is independent on a photo sensitive material. If the frequency is halved and intensity is doubled, the photoelectric current becomes
Four times
Double
Half
Zero
19-If the intensity of incident light is made double, then the maximum number of emitted electrons will become
Double
Eight times
Four times
Half
20-The Davison and Germer experiment indicates
Interference
Polarization
Electron diffraction
Refraction
21-Two photons of energy 2.5 eV each are incident on a metal plate whose work function is 4.0 eV, then the number of electrons emitted from the metal surface will be
One
More than two
Two
Electron emission is not possible
22-A photoelectric cell is illuminated by a point source of light 1 m away. When the source is taken 2 m away
The number of electrons emitted is quarter of the initial number
The number of electrons emitted is half the initial number
Each electron emitted carries one quarter of initial energy
Each emitted electron carries half the initial energy
23-Stopping potential does not depend upon
Frequency of light
Intensity of light
Wavelength of light
All of these
24-A photon whose energy is Ep joules strikes a photosensitive surface whose work function is phi joule. The maximum energy of the ejected photoelectron is equal to
Ep
Phi - Ep
Phi + Ep
Ep - phi
25-The number of emission spectra are
One
Two
Three
Four
26-The classical theory cannot explain the dependence of photo emission on
Frequency of light
Threshold frequency of light
Speed of light
None of these
27-A radio station emits 10 kW power of 90.8 MHz. Find the number of photon emitted per second
1.6 X 10^28
1.6 X 10^30
1.6 X 10^29
1.6 X 10^32
28-Wave nature of light appears in
Pair production
Photoelectric
Compton effect
Interference
29-During a negative Beta decay
An atomic electron is ejected
A neutron in the nucleous decays emitting an electron
An electron which already present with in the nucleus is ejected
A part of binding energy of nuclei is converted into electron
30-The phenomenon of radioactivity is associated with
Fission of nuclei
Emission of spectral lines
Disintegration of neutrons
Spontaneous disintegration of nucleous of atoms
31-After 2 hours (1/16th) of a initial amount of a certain radioactive isotope remains undecayed, the half-life of the isotope is
60 min
30 min
45 min
15 min
32-Half life of radioactive element depends upon
Amount of element present
Pressure
Temperature
None of these
33-What is not conserved in nuclear processes?
Energy and mass together
Nucleon number
Neutron number
Charge
34-One Curie is.......Bq.
3.70 x 10^10
3.70 x 10^10
3.7 x 10^16
3.7 x 10^25
35-The best place to store/dump nuclear waste
Under the sea
Into the soil
Under the old salt mines
All of these
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