List of top Questions asked in RPET

A parallel plate capacitor of value 1.77 $ \mu $ F is to be designed using a dielectric material (dielectric constant = 200), breakdown strength of $ 3\times {{10}^{6}} $ V/m. In order to make such a capacitor which can withstand a potential difference of 20 V across the plates, the separation between the plates d and area A of the plates respectively are
Two lamps of powers $ {{P}_{1}} $ and $ {{P}_{2}} $ are placed on either side of a paper having an oil spot. The lamps are at distances of 1 m and 2 m respectively on either side of the paper and the oil spot is invisible. What is the value of $ {{P}_{1}}/{{P}_{2}} $ ?
At what temperature is rms speed of air molecules double of that at NTP?
On a massless rod four masses are fixed as shown in figure. What is the moment of inertia about an axis passing through centre of rod
The rate of outflow of liquid through an orifice does not depend upon
The two waves, whose intensities are $ 9:16 $ are made to interfere. The ratio of maximum and minimum intensities in the interference pattern is
A bullet moving with speed 200 m/s is just able to pierce a wooden block of 6 cm thickness. What velocity is required to just pierce a block of 8 cm?
A bullet of 5 g is fired with a velocity of 800 m/s. The velocity of bullet becomes 200 m/s when it pierces a wooden block 2 m thick. What is the average resistance offered by the wooden block?
A small object placed on a rotating horizontal turn-table just slips when it is placed at a distance of 4 cm from the axis of rotation. If the angular velocity of the turn-table is doubled the object slips when its distance from the axis of rotation is
What is the relation between particle velocity (v), the wave velocity (c) and the slope (s) of the wave?
A ball is projected on the strain from the horizontal with velocity u. The maximum number of strains that can be completed crossed is
If the escape velocity at the earth is 11.2 km/s, then what will be the escape velocity of planet having mass 4 times of earth and gravitational acceleration equal to earth?
If the range and time period of projectile are related to $ R=5{{T}^{2}}, $ then the angle of projection will be
The ratio of radii to the gravitational acceleration of planets X and Y are R and a respectively. The ratio of escape velocities at them, is
If $ Z=\frac{a{{b}^{2}}}{{{c}^{3}}} $ , then what is the error in Z? The errors in a, b, c are $ \alpha $ , $ \beta $ and $ \gamma $ respectively
The acceleration a of moving body from rest is 2 (t - 1). Then, the velocity at 5 s will be
The momenta of two particles of masses m and 2m are 2p and p respectively. The ratio of their kinetic energies will be
The positive charged ball is suspended by thread of silk. If we place a positive charge $ {{q}_{0}} $ at one point and measure the $ F/{{q}_{0}}, $ then this can say that electric field E