MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 200950 Mcqs, each offering curated multiple-choice questions to sharpen your General Knowledge knowledge and support exam preparation. Choose a topic below to get started.
| 1951. |
Newton’s law of cooling is also applicable to ? |
| A. | Convection losses |
| B. | Natural convection losses |
| C. | Forced convection losses |
| D. | None of the above |
| Answer» D. None of the above | |
| 1952. |
Heat energy received by the earth from the sun is due to? |
| A. | Convection |
| B. | Radiation |
| C. | Reflection of light |
| D. | Transmission of light |
| Answer» C. Reflection of light | |
| 1953. |
Emissivity of perfectly black body is ? |
| A. | 1 |
| B. | 2 |
| C. | 5 |
| D. | 0 |
| Answer» B. 2 | |
| 1954. |
Two stars A and B radiate maximum energy at 3600°A and 3600°A respectively. Then the ratio of absolute temperatures of A and B is ? |
| A. | 256: 81 |
| B. | 81: 256 |
| C. | 3: 4 |
| D. | 4: 3 |
| Answer» E. | |
| 1955. |
512 calories of radiation is incident on a body. It absorbs 220 calories Tthe coefficient of emission is? |
| A. | 0.43 |
| B. | 0.57 |
| C. | 0.34 |
| D. | 1.7 |
| Answer» C. 0.34 | |
| 1956. |
A liquid is in equilibrium with its vapour at its boiling point. On average, the molecules in the two phases have equal___ |
| A. | inter-molecular forces |
| B. | potential energy |
| C. | kinetic energy |
| D. | temperature |
| Answer» E. | |
| 1957. |
The average velocity of an ideal gas molecule at27°C is 0.3 m/s. The average speed at 927°C will be? |
| A. | 0.6 m/s |
| B. | .3 m/s |
| C. | .9 m/s |
| D. | 3.0 m/s |
| Answer» B. .3 m/s | |
| 1958. |
The frequency of vibration of a string can be increased by ? |
| A. | Increasing the length of the string keeping the tension constant |
| B. | Decreasing the density of the string keeping the tension constant |
| C. | Increasing the thickness of the string keeping the length constant |
| D. | Decreasing the tension of the string keeping length constant |
| Answer» C. Increasing the thickness of the string keeping the length constant | |
| 1959. |
In the van der Waals equation of state for a non-ideal gas the term that accounts for intermolecular forces is? |
| A. | (V-b) |
| B. | RT |
| C. | (P + a/V²) |
| D. | RT) ‾ ¹ |
| Answer» D. RT) ‾ ¹ | |
| 1960. |
If frequency of vibration of string is increased by a factor two, then tension in string will be ? |
| A. | Half |
| B. | Double |
| C. | One fourth |
| D. | Four times |
| Answer» E. | |
| 1961. |
A sonometer string and a tuning fork when sounded together gives 6 beats/sec, whether the length of sonometer string is 85 cm or 100 cm. The frequency of tuning fork is? |
| A. | 262 Hz |
| B. | 256 Hz |
| C. | 260 Hz |
| D. | 234 Hz |
| Answer» E. | |
| 1962. |
A tuning fork of frequency 480 Hz produces 10 beats per second when sounded with a vibrating sonometer wire. What must have been the frequency of string if a slight increase in tension produces fewer beats per second than before ? |
| A. | 460 Hz |
| B. | 470 Hz |
| C. | 480 Hz |
| D. | 490 Hz |
| Answer» C. 480 Hz | |
| 1963. |
In a stationary wave, the strain is maximum at the? |
| A. | Nodes |
| B. | Antinodes |
| C. | Between the node and the antinodes |
| D. | Between any two nodes and antinodes |
| Answer» B. Antinodes | |
| 1964. |
A sonometer wire of length l1 vibrates with a frequency 250 Hz. If the length of wire is increased then 2 beats per second are heard. What is ratio of the lengths of the wire? |
| A. | 124: 125 |
| B. | 250: 313 |
| C. | 5: 3 |
| D. | 41: 57 |
| Answer» B. 250: 313 | |
| 1965. |
A standing wave having 3 nodes and 2 antinodes is found between two atoms having a distance of 1.2A°.Between them the wavelength of standing wave will be? |
| A. | 3.63 A° |
| B. | 6.05 A° |
| C. | 1.21 A° |
| D. | 2.42 A° |
| Answer» D. 2.42 A° | |
| 1966. |
A closed organ pipe (closed at one end) is excited so as to support the third overtone. It is then found that in the pipe there are____. |
| A. | Three nodes and three antinodes |
| B. | Three nodes and four antinodes |
| C. | Four nodes and three antinodes |
| D. | Four nodes and four antinodes |
| Answer» E. | |
| 1967. |
A closed organ pipe and an open organ pipe have their first overtones identical in frequency. Their lengths are in the ratio of ? |
| A. | 1: 2 |
| B. | 2: 3 |
| C. | 3: 4 |
| D. | 4: 5 |
| Answer» D. 4: 5 | |
| 1968. |
The linear density of a vibrating string is 1.3 ´ 10-4 kg/m3.A transverse wave is propagating on the string and is described by the equation Y = 0.021 sin (x + 30t)where x and y are measured in meters and t in seconds. The tension in the wire is? |
| A. | 0.12 N |
| B. | 0.48 N |
| C. | 1.20 N |
| D. | 4.80 N |
| Answer» B. 0.48 N | |
| 1969. |
The fundamental frequency of a sting stretched with a weight of 4 kg is 256 Hz. The weight required to produce its octave is? |
| A. | 4 kg wt |
| B. | 12 kg wt |
| C. | 16 kg wt |
| D. | 24 kg wt |
| Answer» D. 24 kg wt | |
| 1970. |
In a stationary wave ? |
| A. | All the particles of the medium vibrate in phase |
| B. | All the particles of antinodes vibrate in phase |
| C. | The particles in successive antinodes vibrate out of phase |
| D. | All the particles between consecutive antinodes vibrate in phase |
| Answer» D. All the particles between consecutive antinodes vibrate in phase | |
| 1971. |
A tuning fork of frequency of 500 c/s is sounded on resonance tube. The first and second resonance are obtained at 17 cm and 50 cm. The velocity of sound in m/sec is ? |
| A. | 170 |
| B. | 350 |
| C. | 520 |
| D. | 850 |
| Answer» C. 520 | |
| 1972. |
A sonometer wire is unison with a tuning fork. Keeping the same tension, the length of the wire between the bridges is doubled. The tuning fork can still be in resonance with the wire, provided the wire now vibrates in ? |
| A. | 4 segments |
| B. | 6 segments |
| C. | 3 segments |
| D. | 2 segments |
| Answer» E. | |
| 1973. |
Transverse position in Meld’s experiment is chanted to parallel position. If length of string remaining the same and tension is made half and if in perpendicular position 4 loops are formed ,number of loops formed in parallel position are? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 1974. |
In a closed organ pipe the fundamental frequency is n. What will be the ratio of frequencies of the next three overtones? |
| A. | 2: 3: 4 |
| B. | 3: 4: 5 |
| C. | 3: 7: 11 |
| D. | 3: 5: 7 |
| Answer» E. | |
| 1975. |
The tension in the sonometer wire is increased by 21%. It's fundamental frequency ____. |
| A. | Increases by 21% |
| B. | Increases by 10% |
| C. | Increases by 5% |
| D. | Increases by 7% |
| Answer» C. Increases by 5% | |
| 1976. |
The sonometer wire is vibrating in the second overtone. We may say that there are ? |
| A. | Two nodes and two antinodes |
| B. | One nodes and two antinodes |
| C. | Four nodes and three antinodes |
| D. | Three nodes and three antinodes |
| Answer» D. Three nodes and three antinodes | |
| 1977. |
Two wires made up of the same material are of equal lengths but their diameters are in the ratio 1: 2.On stretching each of these two strings by the same tension, the ratio between the fundamental frequencies of these strings is ? |
| A. | 1: 4 |
| B. | 1: 2 |
| C. | 2: 1 |
| D. | 4: 1 |
| Answer» D. 4: 1 | |
| 1978. |
Air is blown at the mouth of a tube (Length 25 cm and diameter 3 cm) closed at one end. Velocity of sound is 330 m/s. The sound which is produced will correspond to the frequencies __. |
| A. | 330 Hz |
| B. | Combination of frequencies 330, 660, 990, 120, 1650 Hz |
| C. | Combination of frequencies 330, 990, 1650, 2310, Hz |
| D. | Combination of frequencies 300, 900, 1500, 2100, Hz |
| Answer» D. Combination of frequencies 300, 900, 1500, 2100, Hz | |
| 1979. |
The type of wave produced in a SITAR wire are ? |
| A. | Progressive transverse wave |
| B. | Progressive longitudinal wave |
| C. | Stationary transverse wave |
| D. | Stationary longitudinal wave |
| Answer» D. Stationary longitudinal wave | |
| 1980. |
The harmonics which are present in a pipe open at one end are? |
| A. | Odd harmonics |
| B. | Even harmonics |
| C. | Even as we as odd harmonics |
| D. | None of these |
| Answer» B. Even harmonics | |
| 1981. |
The speed of sound in air is 350 meter per second. The fundamental frequency of an open pipe 50 cm long will be ? |
| A. | 175 Hz |
| B. | 350 Hz |
| C. | 700 Hz |
| D. | 50 Hz |
| Answer» C. 700 Hz | |
| 1982. |
A glass tube of 1.0 m length is filled with water. The water can be drained out slowly at the bottom of the tube. If a vibrating tuning fork of frequency 500 Hz is brought at the upper end of the tube and the velocity of sound is 330 m/s, then the total number of resonance obtained will be ? |
| A. | 4 |
| B. | 3 |
| C. | 2 |
| D. | 1 |
| Answer» C. 2 | |
| 1983. |
The ratio between the amplitudes of two superposing waves is 3: 2.The ratio between the maximum and minimum intensities of the resultant wave will be ? |
| A. | 9: 4 |
| B. | 25: 1 |
| C. | 13: 5 |
| D. | 5: 1 |
| Answer» C. 13: 5 | |
| 1984. |
Two stretched wires of same material of lengths l and 2 l vibrate with frequencies 100 and 150 Hz respectively. The ratio of their tension is? |
| A. | 2: 3 |
| B. | 3: 2 |
| C. | 1: 9 |
| D. | 1: 3 |
| Answer» D. 1: 3 | |
| 1985. |
An open pipe is suddenly closed with the result that, the second overtone on the closed pipe is found to be higher in frequency by 100 Hz, then the first overtone of the original pipe. Tthe fundamental frequency of open pipe will be? |
| A. | 100 Hz |
| B. | 300 Hz |
| C. | 150 Hz |
| D. | 200 Hz |
| Answer» E. | |
| 1986. |
The end correction of a resonance column is 1.0 cm. If the shortest length resonating with a tuning fork is 15.0 cm, the next resonating length is? |
| A. | 31 cm |
| B. | 45 cm |
| C. | 46 cm |
| D. | 47 cm |
| Answer» E. | |
| 1987. |
A string is vibrating in first overtone then point formed exactly at the middle is ? |
| A. | Node |
| B. | Antinodes |
| C. | Sometimes node and sometimes antinodes |
| D. | None of these |
| Answer» B. Antinodes | |
| 1988. |
String is in fundamental mode of vibration, then velocity is directly proportional to _______ |
| A. | Square root of tension |
| B. | Square root of length |
| C. | Square of tension |
| D. | Square root of linear density |
| Answer» B. Square root of length | |
| 1989. |
Two identical straight wires are stretched so as to produce 6 beats per second when tension slightly in one of them, the beat frequency remains unchanged. Denoting by T1 and T2 the higher and lower initial tension in the strings, then it could be said that while making the above changes in tension____ |
| A. | T2 was decreased |
| B. | T2 was increased |
| C. | T1 was decreased |
| D. | Both (b) and (c) |
| Answer» E. | |
| 1990. |
In stationary waves____. |
| A. | Energy is uniformly distributed |
| B. | Energy is minimum at nodes and maximum at antinodes |
| C. | Energy is maximum at nodes and minimum at antinodes |
| D. | None of these |
| Answer» C. Energy is maximum at nodes and minimum at antinodes | |
| 1991. |
As an empty vessel is filled with water, its frequency __. |
| A. | Increases |
| B. | Decreases |
| C. | Remains the same |
| D. | None of above |
| Answer» B. Decreases | |
| 1992. |
A resonating column of air contains ______. |
| A. | Stationary longitudinal waves |
| B. | Stationary transverse waves |
| C. | Transverse progressive waves |
| D. | Longitudinal progressive waves |
| Answer» B. Stationary transverse waves | |
| 1993. |
Two closed pipe produces 10 beats per second when emitting their fundamental nodes. If their lengths are in the ratio of 25: 26 their fundamental frequency in Hz are ? |
| A. | 270, 280 |
| B. | 260, 270 |
| C. | 260, 250 |
| D. | 240, 250 |
| Answer» D. 240, 250 | |
| 1994. |
Four wires of identical lengths, diameters and material are stretched on a sonometer box. The ratio of their tension is 1: 4: 9: 16. The ratio of their fundamental frequencies is ? |
| A. | 1: 6: 9: 16 |
| B. | 4: 3: 2: 1 |
| C. | 1: 2: 3: 4 |
| D. | 1: 4: 9: 16 |
| Answer» D. 1: 4: 9: 16 | |
| 1995. |
An organ pipe open at both ends and another organ pipe closed at one end will resonate with each other, if their lengths are in the ratio of |
| A. | 1: 1 |
| B. | 1: 4 |
| C. | 2: 1 |
| D. | 1: 2 |
| Answer» D. 1: 2 | |
| 1996. |
If n1 is the resonance frequency of a pipe open at both ends and n2 is the resonance frequency of pipe open at one ends only, and both are vibrating in the fundamental mode and the pipes are of the same length, then ? |
| A. | n1 = 2n2 |
| B. | n1 = n2 |
| C. | 2n1 = n2 |
| D. | 3n2 = 4n2 |
| Answer» B. n1 = n2 | |
| 1997. |
The frequency of the note produced by plucking a given string increases as _____. |
| A. | The length of the string increases |
| B. | The tension in the string increases |
| C. | The tension in the string decreases |
| D. | The mass per unit length of the string increases |
| Answer» C. The tension in the string decreases | |
| 1998. |
Velocity of sound in air is 320 m/s. A pipe closed at one end has length of 1 m. Neglecting end corrections, the air column in the pipe can resonates for sound of frequency _____. |
| A. | 80 Hz |
| B. | 320 Hz |
| C. | 400 Hz |
| D. | All (a), (b) u0026 (c) |
| Answer» E. | |
| 1999. |
An open organ pipe has a fundamental frequency of 300 Hz. The first overtone of this organ pipe is the same as the first overtone of a closed organ pipe. The length of the closed organ pipe is ? |
| A. | 10 cm |
| B. | 41 cm |
| C. | 82 cm |
| D. | 164 cm |
| Answer» C. 82 cm | |
| 2000. |
A tube closed at one end and containing air, produces, when excited, the fundamental note of frequency 512 Hz. If the tube is open at both ends, the fundamental frequency that can be excited is (in Hz)? |
| A. | 1024 |
| B. | 512 |
| C. | 256 |
| D. | 128 |
| Answer» B. 512 | |