Free Physics Questions for Polytechnic Exams

Polytechnic | Physics QBank

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ScholarWorm welcomes our aspirants who are always hungry for more knowledge. We are here with our Free Physics QBank for Polytechnic Entrance Exams to help our students to practice regularly and perform at best of their ability in their exams.

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1. The Test Paper is AI generated.

2. On clicking the button below the AI bot creates a set of 20 Questions from the pool of questions that is being updated regularly by our expert faculties.

3. A Timer is set for each Test Set, once time is up the AI will automatically submit the test.

4. New Question Set can be created by going backwards and repeating the above steps.

Note :- Number of Questions and Timer is not customizable in Free QBanks.

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#1. The basic phenomenon of working of an electric generator is

Electromagnetic Induction

Ferroelectric effect

Photoelectric effect

Hall effect

#2. The resistance of conductor depends on

nature of substance of conductor

area of cross section of conductor

length of conductor

All of above

#3. Drift speed of electron in an electric conductor is

none

70 mm/s

0.07 mm/s

7 mm/s

#4. Ohm's law is valid for

Metal conductors

Isulators

Semiconductors

gaseous conductors

#5. In case Bi concave lens line joining centre of curvatures is of what shape ?

None

curved outside

straight line

curved inside

#6. The device that detects the presence of a current in a circuit is

Voltmeter

Diode

Resistor

Galvanometer

#7. SI unit of potential difference is

Ampere

Coulomb

Joule

Volt

#8. 1 ohm is equal to

1 volt / 1 ampere

Volt × Ampere²

1 ampere / 1 volt

Volt × Ampere

#9. Among the following colours which bends the most when white light undergoes dispersion is

Indigo

Orange

Red

Yellow

#10. According to Flaming’s left hand rule, the fore finger is pointed towards the direction of

Motion of the conductor

Force exerted

Electric current

Magnetic field

#11. The strong magnetic field produced inside a solenoid can be used to magnetise a piece of magnetic material like soft iron when placed inside the coil. The magnet so formed is called as

Paramagnet

Permanent magnet

Diamagnet

Electromagnet

#12. A current through a horizontal power line flows in East to west direction. The direction of magnetic field at a point directly below the power line is

East to west

North to South

South to North

West to East

#13. Which of the following is used to prevent damages due to overloading to the household

semiconductor

Resistance

Switch

Fuse

#14. The imaginary line passing through the center of curvature and pole of a speherical mirror is

Principal focus

Focal length

Principal axis

Parallel ray

#15. If the radius of curvature of mirror and 'f' is focal length, which of the following relation is correct ?

R - 2f = 0

R +2f =0

R= f

2R = f

#16. If the length of the metallic wire is doubled then the resistance of the wire

Reduces by ¼

Quadruples

Doubles

Reduces by half

#17. Which of the following converts mechanical energy into eletrical energy ?

switch

Motor

Battery

Generator

#18. The phenomeno of electro-magnetic induction is

The process of rotating a coil of an electric motor

Process of charging a body

Process of generating magnetic field due to a current passing through a coil

Inducing electric current in a coil due to relative motion between a magnet and a coil

#19. Image formed by a plane mirror is always

Virtual and erect

Virtual and inverted

Real and inverted

Real and erect

#20. Which of the following indicates the lens formula ?

1/f = 1/v -1/u

f = 1/v -1/u

1/f = v -u

f = 1/(v-u)

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