MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 754 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
When a force is applied at one end of an elastic wire it produces at strain ∝ in the wire. If y is the youngs modulus of the material of the wire the amount of energy stored per unit volume of the wire is given by_________________? |
| A. | Y∝ |
| B. | 2Y∝ |
| C. | Y∝/2 |
| D. | Y∝2 |
| Answer» E. | |
| 102. |
When a force is parallel to the direction of motion of the body, then work done on the body is_____________________? |
| A. | zero |
| B. | minimum |
| C. | infinity |
| D. | maximum |
| Answer» E. | |
| 103. |
When a body moves in a straight line then its displacement coincides with__________________? |
| A. | distance |
| B. | force |
| C. | acceleration is zero |
| D. | both A and B |
| Answer» B. force | |
| 104. |
When a body moves in a circle of radius r with linear speed V its centripetal force is_______________? |
| A. | mV/r2 |
| B. | mV/r |
| C. | mV2/r |
| D. | mV2/r2 |
| Answer» D. mV2/r2 | |
| 105. |
When a body is moving along a circular path it covers a certain angle in a given interval of time. Such type of motion is__________________? |
| A. | Vibratory motion |
| B. | Linear motion |
| C. | Rotatory motion |
| D. | Angular motion |
| Answer» E. | |
| 106. |
When a body is whirled in a horizontal circle by means of a string the centripetal force is supplied by______________? |
| A. | Mass of a body |
| B. | Velocity of body |
| C. | The tension in the string |
| D. | Centripetal acceleration |
| Answer» D. Centripetal acceleration | |
| 107. |
What is the value of the current in a wire of 10cm long at the right angle to a uniform magnetic field of 0.5 Weber/m2 when the force acting on the wire is 5N ? |
| A. | 1A |
| B. | 10A |
| C. | 100A |
| D. | 1000A |
| Answer» D. 1000A | |
| 108. |
What is the SI unit of modulus of elasticity of substance ? |
| A. | Nm-2 |
| B. | Jm-2 |
| C. | Nm-1 |
| D. | Being a number it has no unit. |
| Answer» B. Jm-2 | |
| 109. |
What is the shape of velocity, time graph for constant acceleration ? |
| A. | straight inclined line |
| B. | parabola |
| C. | inclined curve |
| D. | declined curve |
| Answer» B. parabola | |
| 110. |
What is the self-inductance of a coil in which an induced emf of 2V is set up when the current changes at the rate of 4 As-1 ? |
| A. | 0.5 mH |
| B. | 0.5H |
| C. | 2.0H |
| D. | 8.0H |
| Answer» C. 2.0H | |
| 111. |
What is the outward force acting on a mass of 10 kg when rotating at one end an inelastic string 10m long at speed of 1m/s ? |
| A. | 1N |
| B. | 10N |
| C. | 2N |
| D. | 100N |
| Answer» B. 10N | |
| 112. |
What is the angle that the given vector makes with y-axis and A=2i+3j ? |
| A. | 30° |
| B. | 60° |
| C. | 90° |
| D. | 120° |
| Answer» C. 90° | |
| 113. |
What is the angle of projection for which the range and maximum height become equal ? |
| A. | tan-1 ¼ |
| B. | tan-1 4 |
| C. | tan-1 ½ |
| D. | tan-1 2 |
| Answer» C. tan-1 ½ | |
| 114. |
What are the dimensions of stress ? |
| A. | MLT-2 |
| B. | ML-2T-1 |
| C. | ML-1T-2 |
| D. | ML-T-1 |
| Answer» D. ML-T-1 | |
| 115. |
We prefer mercury as a thermometric substance because______________? |
| A. | Over a wide range of temperature its expansion is uniform |
| B. | It does not stick to thermometer glass |
| C. | It opaque to light |
| D. | All of above |
| Answer» E. | |
| 116. |
We can produce heat by________________? |
| A. | Frictional process |
| B. | Chemical processes |
| C. | Electrical processes |
| D. | All of the above |
| Answer» E. | |
| 117. |
Waves emitted from the antenna are__________________? |
| A. | Sound waves |
| B. | Electromagnetic waves |
| C. | Radio waves |
| D. | Modulated waves |
| Answer» C. Radio waves | |
| 118. |
Waves transmit ________________ from one place to another? |
| A. | energy |
| B. | mass |
| C. | both |
| D. | none |
| Answer» B. mass | |
| 119. |
Waves produced at the surface of water by a pencil executing vibrating motion if held vertically at a frequency of 50Hz are__________________? |
| A. | Longitudinal |
| B. | Transverse |
| C. | Periodic |
| D. | both A and C |
| Answer» E. | |
| 120. |
Wavelength of X-rays falling at glancing angle of 30? on a crystal with atmic spacing 2 x 10-10 for the fist order diffraction is________________? |
| A. | 4 x 10-10 m |
| B. | 2 x 10-10 m |
| C. | 0.02×10-10m |
| D. | 20×10-10m |
| Answer» C. 0.02×10-10m | |
| 121. |
Wave-like characteristic of electron is demonstrated by______________? |
| A. | Line spectrum of atoms |
| B. | Production of x-rays. |
| C. | Diffraction by crystalline solids |
| D. | Photoelectric effect |
| Answer» D. Photoelectric effect | |
| 122. |
Very weak magnetic fields are detected by___________________? |
| A. | Squids |
| B. | Magnetic resonance imaging (MRI) |
| C. | Magnetometer |
| D. | Oscilloscope |
| Answer» B. Magnetic resonance imaging (MRI) | |
| 123. |
Venturi meter is used to measure_________________? |
| A. | Fluid pressure |
| B. | Fluid density |
| C. | Fluid speed |
| D. | None |
| Answer» B. Fluid density | |
| 124. |
Velocity of sound in vacuum is ____________________? |
| A. | 332 ms-1 |
| B. | 320 ms-1 |
| C. | Zero |
| D. | 224 ms-1 |
| Answer» D. 224 ms-1 | |
| 125. |
Velocity of fluid increases where the pressure is________________? |
| A. | Low |
| B. | High |
| C. | Constant |
| D. | Changes continuously |
| Answer» B. High | |
| 126. |
Various types of cancer are treated by_________________? |
| A. | Cobalt-60 |
| B. | Strontium-90 |
| C. | Carbon-14 |
| D. | Nickel-63 |
| Answer» B. Strontium-90 | |
| 127. |
Value of permeability of free space in SI units is___________________? |
| A. | 4πx10-9 WbA-1m-1 |
| B. | 4πx10-7 WbA-1m-1 |
| C. | 4πx10-10 WbA-1m-1 |
| D. | 4πx10-8 WbA-1m-1 |
| Answer» C. 4πx10-10 WbA-1m-1 | |
| 128. |
UV radiation can be produced by______________? |
| A. | Heating the filament |
| B. | Electron excitation in the gas |
| C. | Ionization of atoms |
| D. | All the above |
| Answer» C. Ionization of atoms | |
| 129. |
Unit vector n^ is along______________? |
| A. | X-axis |
| B. | Normal on a surface |
| C. | Y-axis |
| D. | Z-axis |
| Answer» C. Y-axis | |
| 130. |
Unit of power of a lens is________________? |
| A. | meter |
| B. | watt |
| C. | diopter |
| D. | horsepower |
| Answer» D. horsepower | |
| 131. |
Unit of G is ______________? |
| A. | Nm2Kg2 |
| B. | Nm2Kg |
| C. | Nm2Kg-2 |
| D. | None |
| Answer» C. Nm2Kg-2 | |
| 132. |
Ultrasonic have__________________? |
| A. | frequency in the audible range |
| B. | frequency is greater than 20 kHz |
| C. | frequency lower than 20 Hz |
| D. | all of above |
| Answer» C. frequency lower than 20 Hz | |
| 133. |
Two vectors are A = 3i^+2j^ -k^& B = 3i^-2j^ +k^ , then_____________? |
| A. | B is anti-parallel to A |
| B. | B is a negative vector of A |
| C. | B has a negative magnitude |
| D. | B is perpendicular to A |
| Answer» C. B has a negative magnitude | |
| 134. |
Two vectors A and B are making angle θ with each other. The scalar projection of vector B on vector A is written as____________? |
| A. | A.B/A |
| B. | A.B/B |
| C. | A.cosθ |
| D. | Both a and b are correct |
| Answer» B. A.B/B | |
| 135. |
Two sources of light are coherent if they emit rays of_______________? |
| A. | same wavelength |
| B. | same amplitude of vibration |
| C. | same wave length with constant phase difference |
| D. | same amplitude and wavelength |
| Answer» D. same amplitude and wavelength | |
| 136. |
Two parallel wires carrying currents in the opposite directions____________________? |
| A. | repel each other |
| B. | attract each other |
| C. | have no effect upon each other |
| D. | they cancel out their individual magnetic fields |
| Answer» B. attract each other | |
| 137. |
Two identical coaxial circular loops carry equal currents in the same direction. If the loops approach each other the current in______________? |
| A. | Each increase |
| B. | Each decrease |
| C. | Each remains the same |
| D. | One increases whereas that in the other decreases |
| Answer» C. Each remains the same | |
| 138. |
Two fog droplets have radius 2:3 their terminal velocities are_______________? |
| A. | 4:06 |
| B. | 4:09 |
| C. | 2:09 |
| D. | 4.3 |
| Answer» C. 2:09 | |
| 139. |
Two convex lenses of equal focal length f are placed in contact the resultant focal length of the combination is______________? |
| A. | zero |
| B. | focus |
| C. | 2 f |
| D. | f/2 |
| Answer» E. | |
| 140. |
T.V sets and microwave ovens emit ___________________? |
| A. | X-rays |
| B. | α-rays |
| C. | β-rays |
| D. | γ-rays |
| Answer» B. α-rays | |
| 141. |
Triple point of water is_____________________? |
| A. | 273°C at 6.11 Kpa |
| B. | 273K at 61.6 Kpa |
| C. | 273.16°C at 0.611 Kpa |
| D. | 273.16K at 750 Kpa |
| Answer» D. 273.16K at 750 Kpa | |
| 142. |
Transuranic elements have an atomic number_______________? |
| A. | Greater than 72 |
| B. | Greater than 82 |
| C. | Greater than 92 |
| D. | Greater than 102 |
| Answer» D. Greater than 102 | |
| 143. |
Total uncertainty, in the result obtained from the subtraction of two measurements, is equal to_______________? |
| A. | Sum of their absolute uncertainties |
| B. | The difference of their absolute uncertainties |
| C. | The product of their absolute uncertainties |
| D. | Division of their absolute uncertainties |
| Answer» B. The difference of their absolute uncertainties | |
| 144. |
Total number of series in hydrogen spectrum is_____________? |
| A. | three |
| B. | four |
| C. | five |
| D. | six |
| Answer» D. six | |
| 145. |
Total distance travelled by a bob of the simple pendulum in one vibration is equal to________________? |
| A. | Amplitude |
| B. | Square of the amplitude |
| C. | 2 x amplitude |
| D. | 4 x amplitude |
| Answer» E. | |
| 146. |
Torque is defined as______________? |
| A. | Turning effect of force |
| B. | Cross product of position vector and force |
| C. | Product of force and moment arm |
| D. | All A, B and C are correct |
| Answer» E. | |
| 147. |
Torque acting on a body determines_______________? |
| A. | Acceleration |
| B. | Linear acceleration |
| C. | Angular acceleration |
| D. | Direction of motion of the body |
| Answer» D. Direction of motion of the body | |
| 148. |
To reduce the uncertainty in the timing experiment______________? |
| A. | Highly precise instrument |
| B. | Conduct at room temperature |
| C. | Count number of vibration |
| D. | Both a and C |
| Answer» E. | |
| 149. |
To obtain an n-type semiconductor germanium crystal it must be doped with foreign atoms whose valency is_____________? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» E. | |
| 150. |
To obtain a p-type semi-conductor Si Crystal must be doped with foreign atoms whose valency is_____________? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» C. 4 | |