DSSSB PGT Physics Mock Test - 3 - DSSSB TGT/PGT/PRT MCQ
30 Questions MCQ Test - DSSSB PGT Physics Mock Test - 3
A smooth block is released at rest on a 45° incline and then slides a distances d. The time taken to slide is n time as much to slide on rough incline than on a smooth incline. The coefficient of friction is
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Consider a car moving on a straight road with a speed of 100 ms-1. The distance at which car can be stopped, is 
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A block is kept on a frictionless inclined surface with angle of inclination a. The incline is given an acceleration a to keep the block stationary. Then a is equal to
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It is advised to drive along the slippery road slowly, because:
The angular acceleration is known as the rate of change of _________.
A body dropped from height H reaches the ground with a speed of 
A ball of mass 10 g hits a hard surface vertically with a speed of 5 m/s and rebounds with the same speed. The ball remains in contact with the surface for 0.01 s. The average force exerted by the surface on the ball is
An earth satellite is moving around the earth in a circular orbit. In such case, what is conserved?
To complete one revolution around Earth, communication satellites take
A circular steel wire 2.00 m long must stretch no more than 0.25 cm when a tensile force of 400 N is applied to each end of the wire. What minimum diameter is required for the wire?
A mild steel wire of length 1.0 m and cross-sectional area 0.50 × 10−2 cm2 is stretched, well within its elastic limit, horizontally between two pillars. A mass of 100 g is suspended from the mid-point of the wire. Calculate the depression at the midpoint.
The property by virtue of which the free surface of a liquid at rest behaves like an elastic stretched membrane tending to contract so as to occupy minimum surface area is known as
In an adiabatic process gas is reduced to quarter of its volume. What would happen to its pressure? Given ratio of specific heats γ= 2
A 7 kg disc is free to rotate about a horizontal axis passing through its centre O (see figure). The radius of the disc is 10 cm and spring constant of both the spring is 600 Nm-1 There is no slipping between the disc and the string. The time period of small oscillations of the disc is
Electric flux will be maximum if the angle between the field lines and area vector is ______
What is the angle between the electric dipole moment and the electric field on the equatorial line of the dipole?
On moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points is
What will be the effect on capacitance, if the distance between the parallel plates reduced to one-third of its original value?
What should be the radius of an isolated spherical conductor so that it has a capacity of 2μF?
Shown in figure is a Post Office box. In order to calculate the value of external resistance, it should be connected between
Kamla peddles a stationary bicycle the pedals of the bicycle are attached to a 100 turn coil of area 0.10m2. The coil rotates at half a revolution per second and it is placed in a uniform magnetic field of 0.02 T perpendicular to the axis of rotation of the coil. What is the maximum voltage generated in the coil?
A pair of adjacent coils has a mutual inductance of 1.5 H. If the current in one coil changes from 0 to 20 A in 0.5 s, change of flux linkage with the other coil is
The magnetic field between the Horizontal poles of an electromagnet in is uniform at any time, but its magnitude is increasing at the rate of 0.020 T/s.The area of a loop made of perfect insulating material is 120cm2.This loop is kept horizontally in the magnetic field. Induced emf and the induced current in the circuit are
A radio can tune over the frequency range of a portion of MW broadcast band: (800 kHz to 1200 kHz). If its LC circuit has an effective inductance of 200 μH, what must be the range of its variable capacitor?
A light bulb is rated at 50W for a 220 V supply. The resistance of the bulb, the peak voltage of the source and the rms current through the bulb are
A convex lens forms a real image of an object on a screen; the magnification of the image being 3/2. The object and the screen are kept fixed and the lens is moved through a distance of 16 cm when a sharp image is again formed on the screen; the magnification now being 2/3. What is the focal length of the lens?
For a rectangular slab, refraction takes place at
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