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physics mcqs with answers
An Alternating Current Of The R.M.S Value Of 4.0 A And Frequency 50hz Flows In A Circuit Containing A 10ω Resistor. The Peak Current Is Then ?
20.66a | |
20a | |
6.66a | |
5.66a |
An Alternating Current Is Represented By The Equation I = I∫Sinπt Which Of The Following Equation Represents An Alternating Current Of Frequency And
I = 2i∫Sin(2πt) | |
I = 2isinπt | |
I = 2i∫Sin(Πt/2) | |
I = I∫Sin(2πt) |
An Alpha Particle Is Emitted From 88ra226. What Is The Mass And Atomic Number Of The Daughter Nucleus ?
224 – 84 | |
220 – 80 | |
222 – 86 | |
226 – 87 |
An Alpha Particle In A Single Encounter______
Loses A Small Fraction Of Its Energy | |
Losses Most Of Its Energy | |
Loses All Of Its Energy | |
Loses No Energy At All |
An Alpha Particle Can Produce Fluorescence In______
Barium Platinocyanide | |
All Of Above | |
Zns | |
Calcium Tungstate |
An A.C Series Circuit Containing 4ω Resistance And 3ω Inductive Reactance. The Impedance Of The Circuit Is______
7ω | |
5ω | |
1ω | |
7ω |
Ammeter Connected In An Ac Circuit Measures______
Rms Value Of The Current | |
The Net Value Of The Current | |
The Peak Value Of The Current | |
The Exact Value Of The Current |
Alpha Particles Possess Greater Penetration Power Than That Of Beta Particles Due To Its______
Neither Greater Nor Smaller Ionization Power | |
Greater Ionization Power | |
Smaller Ionization Power | |
Same Ionization Power |
Alpha Particle Ionizes An Atom______
Through Electrostatic Repulsion | |
All Of Above | |
Through Electrostatic Attraction | |
Through Direct Collision |
All Electrical Appliances Are Connected In Parallel To Each Other Between The Main Line And Neutral Wire To Get ______
Same Current And Potential Difference | |
Different Current But Same Potential Difference | |
Same Current | |
Different Current And Potential Differences |
After Traveling Through A Vacuum A Photon Of Light Entering Into Some Transparent Denser Medium. Thus The Energy Of Light______
Decreases Because Speed Decreases | |
Increases Then Decrease | |
Increases Because Wavelength Decreases | |
Remains Same |
Adiabatic Process Is Also Called______
Heating Process | |
Heat Exchange Process | |
All Of The Above | |
Isentropic Process |
Addition Of Vector Obeys______
Associative Law | |
Distributive Law | |
All Given Laws In A, B And C | |
Commutative Law |
According To Which One Of Following Law The Density Of Atom Is Uniform ?
Rutherfords Model | |
All Of The Above Laws Contradict The Statement | |
J.J.Thomson Model | |
Bohrs Model |
According To Pascals Law The Pressure Of Gas In A Vessel Is______
Same In All Direction | |
Same Only Along Normal Directions | |
Different In Different Direction | |
Same Only Along Opposite Directions |
According To Newton Sound Travel In Air Under The Conditions Of______
Isochoric | |
Isobaric | |
Isothermal | |
Adiabatic |
According To Equation Of Continuity A1v1 = A2v2 = Constant. The Constant Is Equal To______
The Density Of The Fluid | |
Flow Rate | |
Mass Of Fluid | |
Volume Of Fluid |
According To Einstein, The Gravitational Interaction Is Possible Between______
Electromagnetic Radiations | |
Material Objects Only | |
Material Objects And Electromagnetic Radiation Only | |
None Of The Above |
According To Einstein Light Travels Form One Place To Another In The Form Of ______
Particles | |
Photons | |
Waves | |
It Was Not His Discovery |
Acceptor And Donor Impurities Donate______
N-Carriers Only | |
N-Carriers And P-Carriers Respectively | |
P-Carriers Only | |
P-Carriers And N-Carriers Respectively |
Absolute Uncertainty In A Measurement Depends Upon______
The Magnitude Of The Measurement | |
Least Count Of The Instrument | |
All Of A, B And C | |
Percentage Error In The Measurement |
A Wire Suspended Vertically From One End Is Stretched By Attaching A Weight Of 20n To The Lower End. The Weight Stretches The Wire By 1mm.
0.02j | |
0.04j | |
0.01j | |
1.0j |
A Wire Of Uniform Area Of Cross-Section A Length L And Resistance R Is Cut Into Two Parts. Resistivity Of Each Part ______
Becomes Zero | |
Is Doubled | |
Is Halved | |
Remains The Same |
A Wire Of Resistance R Is Coiled Inductively So That Its Inductance Is L. The Impedance Of The Coil At A Frequency Of F Is______
(R2+4Ï€2f2l2) | |
R+1/2Ï€fl | |
(R+2Ï€fl) | |
(R2+F2l2) |
A Wire Of Length L Is Stretched By A Length E When A Force F Is Applied At One End.
Fe | |
Fe2/L | |
(Fe) | |
Fe2 |