The temperature coefficient for a reaction is two. How many times does the rate of reaction increase if the temperature... View Article
Water is falling on the blades of a turbine from a height of 40m. If the speed of the river... View Article
Microwave oven acts on the principle of a) giving rotational energy to water molecules b) giving translational energy to water... View Article
Which of the following is incorrect? (a) The dimension of a derived quantity is never zero in any base quantity... View Article
Which of the following is not true? (a) At large distances, the electric dipole potential varies as 1/r. (b) Electrostatic... View Article
A student is performing an experiment using a resonance column and a tuning fork of frequency 244 s-1. The student... View Article
The system shown below is in equilibrium. What is the acceleration of block m1, immediately after spring k2 is cut?... View Article
The rectangular loop shown in the figure is co-planar with the straight infinitely long wire carrying current 5 A. The... View Article
If work done in increasing the size of rectangular soap film with dimensions 8 cm × 3.75 cm to 10... View Article
Four cubes of side “a” each of mass 40gm, 20gm,10gm and 20gm are arranged in xy plane as shown in... View Article
A plane em wave travels in free space along x direction. If the value of \(\begin{array}{l}vec{B}\end{array} \) at a particular... View Article
The magnetic field becomes 1/8th of the magnetic field at (a) \(\begin{array}{l}3\sqrt{2}r\end{array} \) (b) \(\begin{array}{l}2^{3/2}r\end{array} \) (c) \(\begin{array}{l}r\sqrt{3}\end{array} \) (d)... View Article
The bag reaches the ground in (a) 18 s (b) 16 s (c) 10 s (d) 20 s Answer: (c)... View Article
Surface density of the plate is equal to (a) \(\begin{array}{l}17.7\times 10^{-10}\,C/m^2\end{array} \) (b) \(\begin{array}{l}-17.7\times 10^{-10}\,C/m^2\end{array} \) (c) \(\begin{array}{l}-8.85\times 10^{-10}\,C/m^2\end{array} \)... View Article
Its terminal voltage is (a) 23.4 V (b) 33.4 V (c) 66.4 V (d) 78.5 V Answer: (a) 23.4 V
The time in which it lands back on the incline is (a) \(\begin{array}{l}t=\frac{vcos\Theta}{g}\end{array} \) (b) \(\begin{array}{l}t=\frac{vsin\Theta}{g}\end{array} \) (c) \(\begin{array}{l}t=\frac{g}{vsin\Theta}\end{array} \)... View Article
The drift velocity (vd) of electrons in the wire is (a) 1.25 mm/sec (b) 1.75 mm/sec (c) 1.5 mm/sec (d)... View Article
Solution: We can find the distance, by using the following formula: \(\begin{array}{l}s=ut+\frac{1}{2}at^2\end{array} \) Substituting the values in the equation, we... View Article
The given properties are examples of covalent solids. Examples of covalent solids are diamond and quartz.
The activity of a radioactive substance is 4700 per minute. Five minutes later the activity is 2700 per minute. The... View Article
