Given, \(\begin{array}{l}\frac{tan \theta}{1 – cot \theta}+ \frac{cot \theta}{1 – tan \theta} = 1 +sec \theta cosec \theta\end{array} \) L.H.S =... View Article
An object is moving in a straight line with constant acceleration. It covers 65 m distance in 5th second and... View Article
A body has a charge of –2µC. If it has 2.5 × 10^13 protons, then how many electrons the body... View Article
In which one of the following regions of the electromagnetic spectrum will the vibrational motion of molecules give rise to... View Article
The figure here shows a smooth ‘looping-the-loop’ track. A particle, of mass m, is released from point A, as shown... View Article
The standard reduction electrode potential of four elements A, B, C and D are 0.8 V, 0.2 V, –1.8 V... View Article
A batsman hits back a ball straight in the direction of the bowler without changing its initial speed of 12... View Article
A cyclotron’s oscillating frequency is 10 MHz. The radius of dee is 60 cm. What is the kinetic energy of... View Article
Two point charges 8q and -2q are located at x = 0 and x = L respectively. The point on... View Article
Earth’s magnetic field at the magnetic equator is approximately 0.4 g. Earth’s dipole moment is (re = 6.4 × 106... View Article
Two tuning forks having frequencies 450 Hz and 448 Hz are tuned together. The time interval between successive instants of... View Article
Two resistors of resistance r and 3r have thermal coefficients of resistance α and 2α respectively. The equivalent thermal coefficient... View Article
A particle is subjected to two simple harmonic motions (both along the x-axis) which are given by \(\begin{array}{l}x=2sin\omega t\end{array} \)... View Article
Even when rain is falling vertically downwards the front screen of a moving car gets wet. On the other hand,... View Article
An electric heater having a heating coil of 150 ohms connected with a supply voltage of 220 V is used... View Article
A laser beam of a plane monochromatic radiation has an intensity of 2.5 × 10^14 Wm−2. The amplitude of the... View Article
If the equation of sound wave is y = 0.0015sin(62.4x + 316t), then its wavelength will be Answer: If the... View Article
The half-life of \(\begin{array}{l}_{238}^{92}\textrm{U}\end{array} \) undergoing α-decay is 4.5 * 10-9. What is the true activity initial 1 gm of... View Article
A car is moving on a circular track of radius of 150 m, and at some time, its speed is... View Article
A balloon of weight w newton descends with an acceleration f m/s2. The weight that must be thrown out in... View Article
