|FPSC MCQs Physics Solutions & Question Answers|
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Physics FPSC Online Quiz Test Objective Type MCQs
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Q.1: Image of an object 5 mm high is only 1 cm high. Magnification produced by lens is--------- ?
Q.2: In hydrogen spectrum which one of the following series lies in the ultraviolet region ?
- Balmer series
- Pfund series
- Bracket series
- Lymann series
Q.3: Bracket series is obtained when all transition of electron terminate on--------- ?
- 4th orbit
- 5th orbit
- 3rd orbit
- 2nd orbit
Q.4: Radiation produced from TV picture tube is-------- ?
- Far infrared
Q.5: Which one of the following has the greatest energy gap ?
- semi conductor
- any of above
Q.6: The simplest type of rectification known as half wave rectification is obtained by--------- ?
- using a transistor
- suppressing the harmonics in A.C voltage
- suppressing half wave of A.C supply by using diode
- using a Coolidge tube
Q.7: An OP-AMPs can amplify------- ?
- Both A.
- & D.C.
- None of the above
Q.8: If the pressure of a given gas is held constant its density is inversely proportional to its absolute temperature. We can refer it as another statement of------- ?
- Boyles law
- Charles law
- Ideal gas law
- Avagadros law
Q.9: At what temperature is the Fahrenheit scale reading equal to twice that of the Celsius scale ?
Q.10: An OP-AMP comparator is a circuit that compares the signal voltage on one of its inputs with a -------- ?
- Non-inverting voltage at output
- Virtual input
- Reference voltage on the other
Q.11: The purpose of flywheel in the engines is------- ?
- to smooth out the energy variation
- to add more weight to engine to work it stable
- to start engine
- both A and B
Q.12: A vector can be multiplied by a number. The number may be----- ?
- Dimensional scalar
- All A, B and C are correct
Q.13: A central force is that which-------- ?
- Can produce torque
- Cannot produce torque
- Some time can produce torque some time cannot
- Has no relation with torque
Q.14: An angle between two vectors A and B can be determined by-------- ?
- Their dot product
- Their cross product
- Head to tail rule
- Right-hand rule
Q.15: Antimatter consists of -------- ?
- All of above
Q.16: Which one of the following radiations possesses maximum velocity ?
- All of above have the same speed
Q.17: Which one of following postulate is in accordance with the Rutherfords model ?
- continuous spectra for atoms
- discrete spectra for atoms
- either continuous nor discrete
- no spectrum
Q.18: UV radiation can be produced by-------- ?
- Heating the filament
- Electron excitation in the gas
- Ionization of atoms
- All the above
Q.19: Semi-conductor germanium and silicon are--------- ?
Q.20: Depletion region of a junction is formed------ ?
- during the manufacturing process
- under forward bias
- under reverse bias
- when temperature varies