4161.A car moving on a horizontal road may be thrown out of the road is taking a turn
by the gravitational force
due to the lack of proper centripetal force
due to the lack of frictional force between the tire and the road
due to the reaction of the ground
4168.A fighter aeroplane flying in the sky dives with a speed of 360 km/hr in a vertical circle of radius 200 m. Weight of the pilot sitting in it is 75 kg. What will be the value of force with which the pilot presses his seat when the aeroplane is at highest position (g = 10 m/s2)
3000 N
1500 N
(75 × g)N
300 N
4179.A body in a room cools from 90°C to 80°C in 5 minutes. the time taken to cool from 70°C to 60°C is
Less than 5 minute
5 minute
More than 5 minutes
Less or more than 5 minutes depending upon the nature of the body
4185.The process of heat transfer in which heat is transferred with actual migration of medium particles is known as
Conduction
Convection
Radiation
Reflection
4187.Which of the following will radiate heat to large extent?
Rough surface
Polished surface
Black rough surface
Black polished surface
4191.Two sphere of the same material have radii 1 m and 4 m and temperature 4000 K and 2000 K respectively. the energy radiated per second by the first sphere is
Greater then by the second
Less than that by the second
Equal in both cases
The information is incomplete to draw and conclusion
4196.Two spheres made of same material have radii in the ratio 2:1. if both the spheres are at same temperature, then what is the ratio of heat radiation energy emitted per second by them
1: 4
4: 1
3: 4
4: 3
11594.Match the columns:
List I List II
Forms Quantities
A. Cu sec 1. Pressure
B. Byte 2. Intensity of earthquakes
C. Richter 3. Rate of flow
D. Bar 4. Computer memory
List I List II
Forms Quantities
A. Cu sec 1. Pressure
B. Byte 2. Intensity of earthquakes
C. Richter 3. Rate of flow
D. Bar 4. Computer memory
4 1 2 3
2 4 3 1
3 4 2 1
3 2 1 4
11607.Which of the following laws was passed during the second half of the nineteenth century under the Social and Religious Reform Movement?
Formation of Theosophical Society
Sanction of inter caste and inter communal marriages
Opening of Aligarh Muslim University’
None of the above
11608.If the distance that a radio wave can travel in the time of one complete cycle is 10 metres, then the frequency of the radio wave in cycles per second is
3×108 m/sec
3×106 m/sec
3×109 m/sec
3×107 m/sec
11615.What is the increasing order of the wavelengths of the following colours?
1. Orange
2. Indigo
3. Yellow
4. Violet
1. Orange
2. Indigo
3. Yellow
4. Violet
1, 2, 3 and 4
3, 1, 4 and 2
1, 3, 2 and 4
4, 2, 3 and 1
11625.If the radius of the earth were to shrink by one per cent, its mass remaining the same, the value of g on the earth’s surface would:
increase by 0.5%
increase by 2%
decrease by 0.5%
decrease by 2%
11627.Four wires of same material and of dimensions as under are stretched by a load of same magnitude separately. Which one of them will be elongated maximum?
Wire of 1m length and 2 mm diameter
Wire of 2 m length and 2 mm diameter
Wire of 3 m length and 1.5 mm diameter
Wire of 1 m length and 1 mm diameter
11633.A hollow sphere of radius R, a hollow cube of side R and a thin circular plate of radius R, made up of the same material, are all heated to 20°C above room temperature. When left to cool in the room, which of them will reach the room temperature first?
Circular plate
Cube
Sphere
All of them will reach the room temperature at the same time
11635.Cloudy nights are warmer compared to clear cloudless nights, because clouds:
prevent clod waves from the sky from descending on earth
reflect back the heat given off by earth
produce heat and radiate it towards earth
absorb heat from the atmosphere and send it towards earth
11646.Consider the following statements:
1. A flute of smaller length produces waves of lower frequency.
2. Sound travels in rocks in the form of longitudinal elastic waves only.
Which of the statements given above is/are correct?
1. A flute of smaller length produces waves of lower frequency.
2. Sound travels in rocks in the form of longitudinal elastic waves only.
Which of the statements given above is/are correct?
1 only
2 only
Both 1 and 2
Neither 1 nor 2
11652.Consider the following statements:
An ordinary light bulb has a rather short life because the:
1. filament wire is not uniform.
2. bulb cannot be evacuated completely.
3. wires supporting the filament melt at high
temperatures.
Which of the above statements are correct?
An ordinary light bulb has a rather short life because the:
1. filament wire is not uniform.
2. bulb cannot be evacuated completely.
3. wires supporting the filament melt at high
temperatures.
Which of the above statements are correct?
1 and 3
2 and 3
1 and 2
1, 2 and 3
11655.Graphene is frequently in news recently. What is its importance?
1. It is a two-dimensional material and has good electrical conductivity.
2. It is one of the thinnest but strongest materials tested so far.
3. It is entirely made of silicon and has high optical transparency.
4. It can be used as ‘conducting electrodes’ required for touch screens, LCDs and organic LEDs.
Which of the statements given above are correct?
1. It is a two-dimensional material and has good electrical conductivity.
2. It is one of the thinnest but strongest materials tested so far.
3. It is entirely made of silicon and has high optical transparency.
4. It can be used as ‘conducting electrodes’ required for touch screens, LCDs and organic LEDs.
Which of the statements given above are correct?
1 and 2 only
3 and 4 only
1, 2 and 4 only
1, 2, 3 and 4
11659.Which of the following physical phenomena are responsible for the formation of Rainbow when sunlight falls on drops of rain?
Refraction
Dispersion
Internal Reflection
All of the Above
11662.Which one of the following does a TV remote control unit use to operate a TV set?
Light waves
Sound waves
Microwaves
Radio waves