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Q1. In projectile motion, the object is thrown at an angle

Less than 120º

Greater than 90 degree

Greater than 120 degree

Less than 90 degree

Q2. In pressure cooker the pressure of steam is equal to

2 atmospheric pressure

3 atmospheric pressure

4 atmospheric pressure

1 atmospheric pressure

Q3. In order to see full length. image, a person requires a plane mirror which is .............. of his own height.

Half

One third

One fourth

Twice

Q4. In nuclear chain reaction, the liberated neutrons escapes from the reactor due to .........

Very big size of the fuel

Very small size· of the fuel

Very big mass of the nucleus

Less speed of the neutrons.

Q5. In Fleming’s left hand rule the thumb indicates the direction of

Magnetic field

Motor of conductor

Current

Force

Q6. In electrical power lines, by convention, the live wire is represented by ....... Colour.

Red

Black

Green

White

Q7. In domestic electric circuits the red coloured insulated copper wire is

Earthling

Fuse

Live

Neutral.

Q8. In dispersion, the angle of deviation is minimum for

Red

Violet

Green

Yellow.

Q9. In dispersion, the angle of deviation is maximum for

Green

Yellow

Red

Violet.

Q10. In DC motor, the effect of couple is to

Stop the coil

Rotate the coil

Vibrate the coil

Oscillate the coil.

Q11. In DC motor, the direction of force is given by

Flemming’s left hand rule

Hemming’s right hand rule

Ampere’s swimming rule

Maxwell’s cork screw rule

Q12. In coolidge tube, anode tungsten is embedded in ................

Copper block

Iron block

Nickel block

Aluminium block

Q13. In an electromagnetic wave

Power is equally transferred along electric and magnetic field

Power is transmitted perpendicular to both fields.

Power is transmitted along electric field

Power is transmitted along magnetic field.

Q14. In an electric bell, we use a ......... because the magnetism developed in the rod is

Soft iron rod, permanent

Steel rod, permanent

Soft iron rod, temporary

Steel rod, temporary.

Q15. In all types of chemical combinations, atoms

Never retain their individuality

Are subdivided into smaller particles

Can be created or destroyed

Retain their individuality.

Q16. In all power reactors which one is used as control rods?

Cadmium

Boron

Boron carbide

Cadmium carbon

Q17. In AC generator, the emf varies for every .............

Quarter rotation of the coil

Half rotation of the coil

Complete rotation of the coil·

3/4 th of the rotation of the coil.

Q18. In AC generator, the armature is rotated about its axis .............

Parallel to the magnetic field

Perpendicular to the direction of induce, emf.

Perpendicular to the magnetic field

Parallel to the direction of induced emf

Q19. In a transformer, the transformer ratio k is also called ...........

Voltage ratio

Power ratio

Current ratio

Turn ratio.

Q20. In a transformer due to electromagnetic induction the varying magnetic flux sets up an emf in the ...........

Primary coil

Secondary coil

Both primary and secondary

Neither in primary nor secondary.

Q21. In a thermal power plant which energy is transformed into electrical?

Potential

Heat

Kinetic

Chemical

Q22. In a telescope, the focal length of the objective is .......... than that of eye piece.

Larger

Smaller

Same

None

Q23. In a streamline flow, the pressure within the fluid varies with

Area of cross-section 0 the pipe

Coefficient of viscosity 0 the liquid

Density

Velocity of the fluid

Q24. In a step up transformer, the turn ratio is ...........

K > 1

K = 1

K = 0

Q25. In a step up transformer the input voltage is 440 V and the out put voltage is 2200 V. The ratio of number of turns of secondary to primary is ...........

Voltage increases and current decreases

Voltage decreases and current increases

Both voltage and current increases

Both voltage and current decreases.

Q26. In a step up transformer the input voltage is 440 V and the out put voltage is 2200 V. The ratio of number of turns of secondary to primary is ...........

6: 1

1 : 5

5 : 1

2: 3

Q27. In a step- up transformer .............

n2 = n1

n2 > n1

n1 > n2

none of the above

Q28. In a rainy day, the relative humidity is

0.7

0.5

Q29. In a particle scattering experiment most of the a - particles pass through the foil

Without any deviation

With more deviation

With less deviation

Scatter through large angle.

Q30. In a- particle model, the sub groups of nucleus consists of how many nucleons?

One proton and three neutrons

Two protons and two neutrons

Two protons and one neutron

One proton and two neutrons.

Q31. In a nuclear reactor, the excess neutrons are absorbed with the help of ................

Moderators

Carbon rods

Control rod

Iron rod.

Q32. In a nuclear chain reaction, the number of fissions takes place at each successive stage goes on inducing in ..........

Arithmetic progression

Hormonic progression

Geometrical progression

Arithmetic-geometrie progression

Q33. In a moving coil galvanometer, the phosphor-bronze hair springs provides

Restoring couple

Torque

Rotating force

none of the above.

Q34. In a naturally occurring uranium which element is 0.7%?

92U 235

92U 238

90U 238

91U 235

Q35. In a moving coil galvanometer, the deflection produced is proportional to the

Mechanical force

current in the coil

Potential difference across the coil

Magnetic induction.

Q36. In a hydrogen atom the electron moves around the nucleus with time period of 1.5 × 10-16 S. What is the value of current associated with electron motion?

Zero

1.6 × 10–19 A

0.17 A

1.07 × 10–3 A

Q37. In a given interval of time, the planet covers longer distance near the

Perigee

Apogee

Maximum at the perigee

Minimum at the apogee.

Q38. In a discharge tube cathode displayed by

Rutherford

Becqueral

Chadwick

J.J. Thomson.

Q39. In a coolidge tube, the high potential is applied to .................

Secondary of an induction coil

Primary of induction coil

Primary of a transformer

Secondary of a transformer

Q40. In a compound microscope, the magnification produced by objective is 5 and by eye piece is 12. What is the total magnification?

Q41. In a circuit containing two unequal resistors connected in parallel

Large current flows through the large resistor

The current is same in ‘both resistors

Smaller resistance has smaller conductance

The voltage drop across both the resistance is same

Q42. In a bio mass, which energy is converted into electrical energy?

Potential

Chemical

Kinetic

Muscular

Q43. In 1972 promoted development and application of space science and technology for Socio economic benefits.

ISRO

INSAT

DOS

APPLE.

Q44. In 1912, who designed the modem X-ray tube?

Henry Becqueral

Dr. William Coolidge

W.C. Roentgen

Dr. Ernest Rutherford

Q45. If two stream of protons move parallel to each other in the same direction, then these

Repel each other

Do not exert any force on the another

Attract each other

Get rotated to be perpendicular to each other.

Q46. If the wavelength is large, what is the refractive index?

Less

Zero

Equal to one.

Q47. If time period of one wave is 0.02 see what is its frequency?

0.02 Hz

5 Hz

50 Hz

200 Hz

Q48. If the velocity of the liquid exceeds the limit the flow of liquid is

Streamline

Turbulent

Either streamline or turbulent

Neither streamline nor turbulent.

Q49. If the transformer ratio is KC1, then the transformer is a ...........

Step up

Step down

Step up as .well as step down

Either step up or step down.

Q50. If the sum of all the forces acting on a moving object is zero. the object will

Slow down and stop

Change the direction of its motion

Accelerate uniformly

Continue moving with constant velocity.

Answers Evaluate

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