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physics mcqs with answers
A Moving Coil Galvanometer Of Resistance 100? Gives Half Scale Deflection For A Current Of 20ma. What Will Be The Potential Difference Across It ?
0.4 Volt | |
2 Volt | |
5 Volt | |
4 Volt |
A Mass Spectrograph (Spectrometer) Sorts Out______
Isotopes | |
Elements | |
Molecules | |
Ions |
A Man Standing Near A Fast Moving Train May Fall______
Towards The Train | |
On Himself | |
Away From The Train | |
On The Train |
A Man Of Weight W Is Standing On An Elevator Which Is Ascending With An Acceleration A. The Apparent Weight Of The Man Is______
Mg – Ma | |
Mg + Ma | |
Mg | |
Mg – Ma |
A Man Lifts Vertically A Weight Of 40kg Through 1m In 10s; While A Chile Lifts Vertically A Weight Of 10kg Through A Distance Of 1m In 1s.
Both Do The Same Amount Of Work | |
Child Does More Work Than Man | |
Man Does More Work Than Child | |
It Is A Foolish Question |
A Man Is In A Car Is Moving With Velocity Of 36km/Hr. His Speed With Repect To The Car Is ______
Zero | |
36m/S | |
10m/S | |
Infinite |
A Magnetic Field______
Always Exerts A Force On A Charged Particle | |
Never Exerts A Force On A Charged Particles | |
Exerts A Force If The Charged Particle Is Moving Perpendicular To The Magnetic Field Lines | |
Exerts A Force If The Charged Particle Is Moving In The Direction Of The Magnetic Field Lines |
A Magnetic Compass Will Be Deflected If It Is Kept Near A______
Both | |
Charge At Rest | |
None | |
Charge In Motion |
A Light Ray Traveling Form Rarer To Denser Medium Suffers A Phase Change Of______
60° | |
180° | |
90° | |
45° |
A Lens Which Converges A Beam Of Parallel Rays To A Point Is Called______
Plano Concave Lens | |
Converging (Or Convex) Lens | |
Diverging (Or Concave) Lens | |
Plano Convex Lens |
A Hoop And Disc Have Same Mass And Radius. Their Rotational K.E Are Related By An Equation______
K.E Hoop = 2k.E Disc | |
K.E Hoop = 1/2k.E Disc | |
K.E Hoop = K.E Disc | |
K.E Hoop = 4k.E Disc |
A Galvanometer Basically Is An Instrument Used To ______
Measure Potential Difference Between Two Points In A Circuit | |
Detect Current In A Circuit | |
Measure Current Flowing Through A Circuit | |
Measure Voltage Across A Circuit |
A Fuse Is Placed In Series With The Circuit To Protect Against______
High Current | |
High Power | |
Over Heating | |
High Voltage |
A Field In Which The Work Done In A Moving A Body Along Closed Path Is Zero Is Called______
Electric Field | |
Conservative Field | |
Electromagnetic Field | |
Gravitational Field |
A Ferromagnet Will Become Fully Magnetized At______
D.C Current At Peak Value | |
High Voltage A.C | |
Low Voltage A.C | |
Alternating Current At Its Peak Value |
A Digit Zero In A Measurement______
May Be Significant May Not Significant | |
Always Significant | |
Always Insignificant Sign | |
Significant Only If Left To A Significant Figure |
A Diffraction Grating Has 500 Lines Per Mm. Its Slit Spacing Or Grating Element Will Be Equal To ______
2 X 10-3 Mm | |
500 Mm | |
2 X 10-5 Mm | |
5 X 10-3 Mm |
A Device For Producing High-Velocity Nuclei Is ______
Cloud Chamber | |
Wilson Cloud Chamber | |
Linear Accelerator | |
A Mass Spectrograph |
A Cyclist Cycling Around A Circular Racing Track Skids Because______
The Friction Between The Tyres Of The Cycle And Road Vanishes | |
The Centripetal Force Upon Him Is Greater Than Limiting Friction | |
The Centripetal Force Upon Him Is Equal To The Limiting Friction | |
The Centripetal Force Upon Him Is Less Than Limiting Friction |
A Current Carrying Conductor Is Placed In A Uniform Magnetic Field Parallel To It. The Magnetic Force Experienced By The Conductor Is ______
F/0 | |
F=1/B | |
F=1/Bsinθ | |
F=1/Bcosθ |
A Cup Of Milk Is Placed In A Microwave Oven. Tell Which Statements Is False. (1) Milk Will Be Heated Up Only. (2) Cup Will Remain Cool.
None | |
1 | |
3 | |
2 |
A Convex Lens Of Focal Length F1 And A Concave Lens Of Focal Length F2 Are Placed In Contact. The Focal Length Of The Combination Is______
F1f2/F2+F1 | |
F2 – F1 | |
F1f2/F1-F2 | |
F2 + F1 |
A Convex Lens Gives A Virtual Image Only When The Objects Lies______
Between Principal Focus And Optical Center | |
Between Principal Focus And Center Of Curvature | |
At The Principal Focus | |
Beyond 2 F |
A Convex Lens Acts As A Diverging Lens If The______
If The Object Is With In C | |
Object Is Beyond C | |
If The Object Is Within F | |
Both B And C |
A Completely Filled Band Is Called______
Core Band | |
Forbidden Band | |
Valence Band | |
Conduction Band |