SMART INSTITUTE NMDCAT PHYSICS 2ND HALF
Master NMDCAT Physics Quiz
Test your knowledge and understanding of key physics concepts crucial for the NMDCAT. This engaging quiz features 35 carefully crafted questions that cover essential topics in the second half of the physics syllabus.
Challenge yourself and see how well you know:
- Work and Energy
- Current and Resistance
- Magnetism
- Transformers
- Rectification
- Wave-Particle Duality
1-Work done by the system on its environment is taken as
Positive
Neutral
Negative
None of these
2-If the potential difference across the two plates of a parallel plate is doubled then its energy stored in it will be
2 times
16 times
4 times
Remains same
3-OHow many electrons per second constitute a current of one micro ampere
One electron
10^6 electrons
10^-6 electron
6.25 x 10^12 electrons
4-Out of the two bulbs in a house, one glow brighter than the other. Which of the following has larger resistance
The brighter bulb
Both have same resistance
The dim bulb
Brightness does not depend on resistance
5-If n resistances are connected in series and then parallel the ratio of equivalent resistance from series to parallel is
1:n
1:n^2
N:1
N^2 :1
6-If the potential difference across a conductor is doubled the rate of heat production will become
Double
Half
2 times
Four times
7-Atypical value of drift velocity is
1 mm/s
10 m/s
1 m/s
1000 km/s
8-The direction at a point on the magnetic field lines of force can be taken along
Normal at that point
The tangent at that point
Axis of the magnetic line of force at that point
Can,t be taken
9-Magnetic effect of current was discovered by
Faraday
Kirchhoff
Oersted
Joule
10-Magnetic field is caused by
Stationary charges
A moving positive charge only
A move negative charge only
Moving negative and positive charges both
11-Two parallel wires carrying current in opposite direction
Repel each other
Attract each
No effect on each other
None of these
12-If a charge particle enters a uniform magnetic field, there is a change in its
Kinetic energy
Magnitude of velocity
Direction of velocity
All of these
13-A current flows in a conductor from east to west. The direction of the magnetic field at a point above the conductor
Towards south
Towards east
Towards north
Towards west
14-An electron enters in a uniform magnetic field making an angle 60 with field. The shape of its trajectory in magnetic field is
Circle
Parabola
Straight line
Helix
15-The radius of curvature of the path of the charged particle in a uniform magnetic field is directly proportional to
The energy of the particle
The momentum of the particle
The intensity of the field
The charge on the particle
16-Which remains constant in a transformer?
Current
Power
Potential
Frequency
17-...........is the energy expanded to magnetize and demagnetize the core material in each cycle of the A.C
Power loss
Hysteresis loss
Heat loss
All of above
18-When a wire loop is rotated in a two poles of magnetic, the direction of e.m.f change once in every
1 revolution
2 revolution
1/4 revolution
1/2 revolution
19-Primary secondary coils of a transformer have 50 and 200 turns respectively. When primary is connected to 9 volt battery secondary voltage is
90
36
18
Zero
20- A transformer is also called as
Static device
Rotatory device
Dynamic device
None of these
21-In full wave rectification, the output D.C voltage across the load is obtained for......
The positive half cycle of input A.C
The negative half cycle of input A.C
The complete cycle of input A.C
All of above
22-If a full wave rectifier circuit is operating from 50 Hz mains, the fundamental frequency in the ripple will be
50 Hz
100 Hz
70.7 Hz
25 Hz
23-Output of half wave rectifier is suitable only
To operate radio
For running a D.C motor
Charging batteries
All of these
24-In a bridge rectifier how many diode conduct during each cycle of input A.C
2
3
1
All
25-The diodes work on
A.C
D.C
BOTH
NONE
26-In the process of rectification, the current received across the load resistance is
A.C
D.C
BOTH
27-Lyman series of H-atoms lie in the ................ Region of EM spectrum
Visible
Infrared
Ultraviolet
Red
28-Photon A has twice the energy of photon B. What is the ratio of the momentum of A to that of B?
2 : 1
1 :1
1 :2
NONE
29-The wavelength of matter waves is independent of
Mass
Momentum
Velocity
Charge
30-Of the following moving with same momentum , the one which has largest wavelength is
An electron
A proton
An alpha particle
All have same de-Broglie wavelength
31-Number of emission spectra are
One
Two
Three
Four
32-Ratio of momentum of photons having wavelength 4000 and 8000 angstrom is
2 : 1
20 : 1
1 : 2
1 : 20
33-When a radioactive nucleons emits a Beta-particle the mass number of atom
Increases by 1
Remains same
Decreases by one
Decreases by four
34-A radioactive decay rate of radioactive elements is found to be 10^3 disintegration per sec at a certain time. If the half life of the element is 1 second, the decay rate after one second is ........ And after 3 second is ............
500, 125
1000, 1000
125, 500
100, 10
35- Fe-59 is used as
Plasma volume
Iron in plasma
Kidney tests
Thyroid uptake scans
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