Physics Mock Test

What is the SI unit of acceleration? ||| \( \text{m/s} \) ||| \( \text{m/s}^2 \) ||| \( \text{km/h} \) ||| \( \text{N} \) ||| 2 The area under a velocity-time graph represents ||| Acceleration ||| Speed ||| Displacement ||| Jerk ||| 3 Which law states that \( F = ma \)? ||| Newton's First Law ||| Newton's Second Law ||| Newton's Third Law ||| Law of Gravitation ||| 2 Which of the following is a scalar quantity? ||| Velocity ||| Force ||| Work ||| Acceleration ||| 3 The escape velocity from Earth is approximately ||| \( 7.9 \, \text{km/s} \) ||| \( 9.8 \, \text{km/s} \) ||| \( 11.2 \, \text{km/s} \) ||| \( 3.5 \, \text{km/s} \) ||| 3 What is the time period \( T \) of a simple pendulum dependent on? ||| Amplitude ||| Mass ||| Length ||| Initial displacement ||| 3 Work done in an isothermal expansion of an ideal gas is given by ||| \( W = nRT \ln \left( \frac{V_f}{V_i} \right) \) ||| \( W = P \Delta V \) ||| \( W = 0 \) ||| \( W = mgh \) ||| 1 The coefficient of friction is defined as ||| \( \mu = \frac{F}{N} \) ||| \( \mu = \frac{N}{F} \) ||| \( \mu = \frac{mg}{N} \) ||| \( \mu = FN \) ||| 1 Which of the following is not a unit of energy? ||| \( \text{Joule} \) ||| \( \text{Calorie} \) ||| \( \text{Watt} \) ||| \( \text{erg} \) ||| 3 The efficiency \( \eta \) of a Carnot engine operating between \( T_1 = 500\,\text{K} \) and \( T_2 = 300\,\text{K} \) is ||| 0.6 ||| 0.4 ||| 0.2 ||| 0.8 ||| 2 Which mirror always forms a virtual and erect image? ||| Plane ||| Concave ||| Convex ||| Cylindrical ||| 3 The focal length of a convex lens is \( 10\,\text{cm} \). Its power is ||| \( 0.1\,\text{D} \) ||| \( 10\,\text{D} \) ||| \( 100\,\text{D} \) ||| \( 1\,\text{D} \) ||| 2 Critical angle is the angle of incidence for which the angle of refraction is ||| \( 90^\circ \) ||| \( 0^\circ \) ||| \( 45^\circ \) ||| Equal to angle of incidence ||| 1 Photoelectric effect proves the existence of ||| Proton ||| Neutron ||| Photon ||| Electron ||| 3 The energy of a photon is directly proportional to its ||| Frequency ||| Wavelength ||| Speed ||| Amplitude ||| 1 In Bohr’s model, angular momentum \( L \) is quantized as ||| \( nh \) ||| \( \frac{nh}{2} \) ||| \( \frac{nh}{2\pi} \) ||| \( 2\pi nh \) ||| 3 Which particle is used to initiate nuclear fission? ||| Alpha particle ||| Beta particle ||| Neutron ||| Proton ||| 3 The dimension of pressure is same as ||| Force × Area ||| \( \frac{\text{Energy}}{\text{Volume}} \) ||| \( \frac{\text{Momentum}}{\text{Time}} \) ||| Power × Time ||| 2 Which wave property changes when light enters a different medium? ||| Frequency ||| Speed ||| Wavelength ||| Amplitude ||| 3 Which of the following is not an electromagnetic wave? ||| X-ray ||| Gamma ray ||| Sound ||| Infrared ||| 3