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physics mcqs with answers
A Wire Obeys Hooks Law Is Of Length 11 When It Is In Equilibrium Under A Tension F1. Its Length Becomes 12 When The Tension Is Increased To F2.
(F1+F2) (12-11) | |
(F1+F2) (122-112) | |
(F1+F2) (12-11) | |
(F1+F2) (121+122) |
A Wire Is Stretched By A Force F Which Causes An Extension 1. The Energy Stored In The Wire Is______
The Cross Sectional Area Of The Wire Remains Constant | |
The Extension Of The Wire Is Proportional To The Force Applied | |
The Weight Of The Wire Is Negligible | |
The Wire Is Not Stretched Beyond Its Elastic Limit |
A Wire Having Very High Value Of Conductance Is Said To Be______
Very Good Conductor | |
No Specific Criterion Available | |
Moderately Good Conductor | |
An Insulator |
A Wheat Stone Bridge Is Said To Be Balanced When______
Minimum Current Flows Through The Galvanometer Branch | |
Maximum Current Flows Through The Galvanometer Branch | |
Potential Difference Across Galvanometer Branch Is Zero | |
Potential Difference Across Galvanometer Branch Is Maximum |
A Voltage V = V0 Cos Ωt Is Applied Across A Resistor Of Resistance R The Average Power Dissipated Per Cycle In The Resistor Is Given By______
V√/√2r | |
V/√2√R | |
V02/√2r | |
2/√2√R |
A Vector Can Be Multiplied By A Number. The Number May Be______
Negative | |
Dimensionless | |
Dimensional Scalar | |
All A, B And C Are Correct |
A Vacant Or Partially Filled Band Is Called ______
Empty Band | |
Valence Band | |
Forbidden Band | |
Conduction Band |
A Uniform Steel Wire Of Length 4m And Area Of Cross-Section 3×10-6m2 Is Extended By 1mm By The Application Of A Force.
0.75j | |
0.100j | |
0.025j | |
0.50j |
A Transmitting Station Emits Radio Waves Of Wavelength Λ At Power P.
Λ | |
Speed Of Sound | |
H | |
Speed Of Light |
A Three-Dimensional Image Is Obtained By______
Electron Microscope | |
Scanning Electron Microscope | |
Magnetic Imaging | |
None Of The Above |
A Thing That Emits Its Own Light Is______
Non- | |
Incandescent | |
Bright | |
Luminous |
A Stone Is Whirled In A Vertical Circle At The End Of A String. When The Stone Is At The Highest Position The Tension In The String Is______
Equal To The Weight Of The Stone | |
Maximum | |
Zero | |
Less Than The Weight Of The Stone |
A Stone Is Thrown Upward From The Top Of A 59.4m High Cliff With An Upward Velocity Component Of 19.6m/S How Long Is The Stone In The Air?
4.00 S | |
7.00 S | |
6.00 S | |
5.00 S |
A Stationary Wave Is Set Up In The Air Column Of A Closed Pipe. At The Closes End Of The Pipe ______
Neither Node Nor Antinode Is Formed | |
Always An Antinode Is Formed | |
Always An Node In Formed | |
Sometimes A Node And Sometimes An Antinode Is Formed |
A Simple Pendulum Suspended From The Ceiling Of A Lift Has Time Period T When The Lift Is At Rest.
G/T | |
Zero | |
Infinite | |
T/G |
A Simple Pendulum Has A Bob Of Mass M And Its Frequency Is F.
Frequency Lower Than 20 Hz | |
1/4f | |
1/2f | |
2f |
A Sensitive Galvanometer Gives Full-Scale Deflection With 100 Mv. If The Resistance Of The Galvanometer Is 50?
2.0 Ma | |
20 Ma | |
0.2 Ma | |
200 Ma |
A Satellite Moving Around The Earth Constitutes______
Non-Inertial Frame | |
Both Inertial And Non-Inertial | |
Neither Inertial Nor Non-Inertial | |
An Inertial Frame Of Reference |
A Rubber Cord Of Cross-Sectional Area 2cm2 Has A Length Of 1m. When A Tensile Force Of 10n Is Applied The Length Of The Cord Increases By 1cm.
2×108 Nm-2 | |
0.5×10-6 Nm-2 | |
0.2×10-6nm-2 | |
5×106 Nm-2 |
A Point Where The Incident Parallel Rays Of Light Converge Or Appear To Diverge After Passing Through A Lens Is Called______
Optical Center | |
Center Of Curvature | |
Focus | |
Aperture |
A Point Source Of Light Placed In A Homogeneous Medium Gives Rise To ______
An Elliptical Wave Front | |
A Plane Wave Front | |
A Cylindrical Wave Front | |
A Spherical Wave Front |
A Photon Of Wavelength 900nm Behaves Like A Particle Of Mass______
5.53 X 10-36kg | |
0 Kg. | |
1.84 X 10-44kg | |
2.46 X 10-36kg |
A Photon Is______
A Positively Charged Particle | |
A Unit Of Wavelength | |
A Quantum Of Electromagnetic Radiation | |
A Unit Of Energy |
A Particle Of Mass M Charge Q And Speed V Enters A Uniform Magnetic Radius R. The Radius R Of The Circle Is______
Directly Proportional To B | |
Directly Proportional To Q | |
Directly Proportional To M | |
Independent Mass M |
A Particle Having The Mass Of An Electron And The Charge Of A Proton Is Called A______
Antiproton | |
Positron | |
Photon | |
Gamma Rays |