DAILY UPDATES MOCK TEST 62

1. The following is a pseudo-force:

Centrepetal force

Centrifugal reaction force

Centrifugal force

Strong nuclear force

2. What will happen to current passing through a resistor if the potential difference across its ends is doubled and the resistance is halved?

Becomes four times

Becomes halved

Remain unchanged

Becomes one fourth

3. Which of the following has the highest refractive index?

Glass

Water

Pearl

Diamond

4. For a plane mirror, magnification (m)=________

0

1

± 1

≤ 0

5. We can see objects because of which phenomena?

Reflection

Refraction

Transmission

Diffraction

6. Which has no importance for fuse wire –

Specific resistance of wire

Diameter of wire

Length of wire

Current passing through the wire

7. The specific resistance of a wire varies with its –

Length

Cross-section

Mass

Material

8. The unit of specific resistance is –

Ohm

Ohm–1

Ohm-metre

Ohm per metre

9. How many electrons constitute a current of one microampere –

6.25 × 10^6

6.25 × 10^12

6.25 × 10^9

6.25 × 10^15

10. Good conductors have many loosely bound –

Atoms

Protons

Molecules

Electrons

11. The variable resistance is called –

Resistor

Rheostat

Open switch

None of these

12. If the length of a wire is doubled and its cross-section is also doubled, then the resistance will –

Increase eight times

Decrease four times

Become four times

Remain unchanged

13. Instruments can be shielded from outside magnetic effects by surrounding them with

Iron shield

Rubber shield

Brass shield

Glass shield

14. Why ammeter is likely to burn out if you connect it in parallel?

It has high voltage

It has high resistance

It has low resistance

It has low voltage

15. The hydraulic brake used in automobiles is a direct application of

Archimedes’ principle

Torricellean law

Bernoulli’s Theorem

Pascal’s law

16. Which instrument is used to measure sound under water ?

Hygrometer

Hygroscope

Hypsometer

Hydrophone

17. Which instrument is used to measure pressure of gases ?

Manometer

Machmeter

Magnetometer

Micrometer

18. Which instrument is used to measure heat radiation ?

Radar

Salinometer

Refractometer

Radio micrometer

19. Which instrument is used to measure strength of direct current ?

Stroboscope

Streoscope

Tangent Galvanometer

Tachometer

20. K. Macmillan invented

Bicycle

Barometer

Calculating Machine

Centigrade Scale

21. Thomas Alva Edison invented

Cinema

Cine Camera

Computer

Cinematograph

22. Alfred Nobel invented

X ray

Diesel Engine

Dynamite

Dynamo

23. David Hughes invented

Machine Gun

Microphone

Microscope

Motorcycle

24. Marie and Pierre Curie invented

Radio

Radium

Radar

Refrigerator

25. Alexander Graham Bell invented

Telephone

Telescope

Television

Tank

26. Xeric condition refers to-

Low temperature

Low humidity

High evaporation

Extreme temperature

27. The ozone layer absorbs

Infrared radiation

Microwaves

Radio wave

Ultraviolet rays

28. The resistance of a semiconductor on heating

Remains

Decreases

Increases

None of the above

29. The earth's magnetic field is due to

Currents circulating inside the core

Presence of a huge magnet at is centre

Moving charges in space outside

None of the above

30. Which of the following option represents the consumption of power in ascending order-

Television, fan, electronic press, electronic kettle

Television, fan, electronic kettle, electronic press

Fan, television, electronic press, electronic kettle

Electronic press, electronic kettle, fan, television

31. How does the white light produce in the tube?

To Heat up the copper wire

To Heat up the filament

To accelerate the atoms

To oscillate molecule

32. Full form of C.F.I. is-

Compact Fluorescent Lamp

Centrally Fixed Lamp

Chemical Fluorescent Lamp

Condensed Fluorescent Lamp

33. A device which converts chemical energy into electrical energy is called-

Battery

Motor

Generator

Moving coil meter

34. The filament of bulb is of

Mercury

Copper

Tungsten

None of these

35. The tolerable limit of noise for human being is around-

45 decibel

85 decibel

125 decibel

155 decibel

36. What is the decibel level of sound produced by two persons in conversation?

About 5 Decibel

About 10 Decibel

About 30 Decibel

About 100 Decibel

37. Maximum temperature inside pressure cooker depends on:

Area of hole on the top and weight kept on it

Area of hole on the top and food being cooked

Weight kept on hole at top and food being cooked

Area of hole on the top only

38. A fan produces feeling of comfort during hot weather, because-

Fan supplies cold air

Our perspiration evaporates rapidly

Our body radiates more heat

Conductivity of air increase

39. The highest temperature attained by a super conductor is-

24 K

138 K

150 K

300 K

40. What is absolute zero temperature?

The starting point of any temperature scale

Theoretically the lowest possible temperature

The temperature at which the vapour of any liquid substance is condensed

The temperature at which all material are in vapour form

41. Which zone of a candle flame is the hottest?

Dark innermost zone

Outermost zone

Middle luminous zone

Central zone

42. The image of the object that we see, forms on the retina of our eyes is—

Always erect

Always inverted

Erect or inverted depends upon the intensity of light

Erect or inverted depends upon the age of the person

43. Evening Sun is not as hot as the midday sun. What is the reason?

In the evening, radiation travel slowly

In the evening, the temperature of the sun decreases

Ozone in atmosphere absorbs more light in the evening

In the evening, radiations travel larger distance through atmosphere

44. A body is thrown vertically upwards and then falls back on the ground. When its potential energy is maximum?

On the ground

At the maximum height

During the return journey

Both on the ground and at the maximum height

45. The magnet is strongest near the-

On equator point from the poles of the magnet

Ends of the magnet

Centre of magnet

None of the above

46. A body travelling with a speed of more than the velocity of sound in air is said to travel with—

Supersonic speed

Hypersonic speed

Ultrasonic speed

Infrasonic speed

47. Which of the special technique is used in ships to calculate the depth of ocean beds?

LASER

SONAR

Sonic boom

Reverberation

48. What is the SI unit of electrical conductance?

Volt

Watt

Siemens

Ampere

49. Which of the following is a conductor of electricity?

Silver

Copper

Aluminium

All of the above

50. Why is tungsten used exclusively for the filament of an incandescent lamp?

Tungsten can be drawn into thin wires which in turn offer high resistance

Tungsten has a fairly good resistivity

The melting point of tungsten is very high

All of these

Daily Updates Mock Test 62

1. The following is a pseudo-force:

2.

What first name or nickname would you like us to use?

2. What will happen to current passing through a resistor if the potential difference across its ends is doubled and the resistance is halved?

3. Which of the following has the highest refractive index?

4. For a plane mirror, magnification (m)=________

5. We can see objects because of which phenomena?

6. Which has no importance for fuse wire –

7. The specific resistance of a wire varies with its –

8. The unit of specific resistance is –

9. How many electrons constitute a current of one microampere –

10. Good conductors have many loosely bound –

11. The variable resistance is called –

12. If the length of a wire is doubled and its cross-section is also doubled, then the resistance will –

13. Instruments can be shielded from outside magnetic effects by surrounding them with

14. Why ammeter is likely to burn out if you connect it in parallel?

15. The hydraulic brake used in automobiles is a direct application of

16. Which instrument is used to measure sound under water ?

17. Which instrument is used to measure pressure of gases ?

18. Which instrument is used to measure heat radiation ?

19. Which instrument is used to measure strength of direct current ?

20. K. Macmillan invented

21. Thomas Alva Edison invented

22. Alfred Nobel invented

23. David Hughes invented

24. Marie and Pierre Curie invented

25. Alexander Graham Bell invented

26. Xeric condition refers to-

27. The ozone layer absorbs

28. The resistance of a semiconductor on heating

29. The earth's magnetic field is due to

30. Which of the following option represents the consumption of power in ascending order-

31. How does the white light produce in the tube?

32. Full form of C.F.I. is-

33. A device which converts chemical energy into electrical energy is called-

34. The filament of bulb is of

35. The tolerable limit of noise for human being is around-

36. What is the decibel level of sound produced by two persons in conversation?

37. Maximum temperature inside pressure cooker depends on:

38. A fan produces feeling of comfort during hot weather, because-

39. The highest temperature attained by a super conductor is-

40. What is absolute zero temperature?

41. Which zone of a candle flame is the hottest?

42. The image of the object that we see, forms on the retina of our eyes is—

43. Evening Sun is not as hot as the midday sun. What is the reason?

44. A body is thrown vertically upwards and then falls back on the ground. When its potential energy is maximum?

45. The magnet is strongest near the-

46. A body travelling with a speed of more than the velocity of sound in air is said to travel with—

47. Which of the special technique is used in ships to calculate the depth of ocean beds?

48. What is the SI unit of electrical conductance?

49. Which of the following is a conductor of electricity?

50. Why is tungsten used exclusively for the filament of an incandescent lamp?