A person is having hypermetropic eye whose near point is at 125 cm. What is the power of the spectacles required for that person?
A person is having hypermetropic eye whose near point is at 100 cm. What is the power of the spectacles... View Article
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When a positively charged particle enters a uniform magnetic field with uniform velocity is trajectory can be
When a positively charged particle enters a uniform magnetic field with uniform velocity is trajectory can be (a) A circle... View Article
Two satellites are orbiting around the earth in circular orbits of same radii. one of them
Two satellites are orbiting around the earth in circular orbits of same radii. One of them is 10 times greater... View Article
An engine supplies a constant power ‘p’ to automobile of mass m starting from rest. At an instant of time t
An engine supplies a constant power ‘p’ to the automobile of mass m starting from rest. At an instant of... View Article
A uniform electric field e exists between the plates a and b and a uniform magnetic field b exists between plates c and d
A uniform electric field e exists between the plates a and b and a uniform magnetic field b exists between... View Article
A sinusoidal voltage v = 200 sin 314t is applied to a resistor of 10ω resistance. Calculate (i) rms value of the voltage (ii) rms value of the current (iii) power dissipated as heat in watt
A sinusoidal voltage v = 200 sin 314t is applied to a resistor of 10ω resistance. Calculate (i) RMS value... View Article
The surface energy of a liquid drop is u it is sprayed into 1000 equal droplets, then total surface energy becomes – (1) u (2) 10 u (3) 100 u (4) 1000 u
The surface energy of a liquid drop is u it is sprayed into 1000 equal droplets, then total surface energy... View Article
The magnetic susceptibility of a medium is 0.825
The magnetic susceptibility of a medium is 0.825. Its relative permeability is (a) 1.825 (b) 2.085 (c) 4.885 (d) 0.825... View Article
The electron drift speed is small and stars of the electron is also small but still we obtain a large current in the conductor this is due to
The electron drift speed is small and stars of the electron is also small but still we obtain a large... View Article
In a particular system the units of length, mass and time are chosen to be 10 cm, 10 g, and 0.1 s respectively. The units of force in this system will be equal to ?
The units of force in this system will be equal to? (a) 1 N (b) 100 N (c) 10 N... View Article
Assertion: It is not possible to see a virtual image by eye. Reason: The rays that seem to emanate from a virtual image do not in fact emanates from the image.
(a) Both assertion and reason are true (b) Both assertion and reason are false (c) Assertion is true but reason... View Article
A fireman wants to slide down a rope.the ropee can bear a tensiomn of 80% of the weight of the man. With what minmuum acclearation shoud the foreman slide down?
A fireman wants to slide down a rope. The ropee can bear a tension of 74% of the weight of... View Article
A force f = 3x+4 displaces an object of mass 10kg from x=0 to x=4m if the speed of the object at x=0 is 2m/sec it’s speed at x=4m will be
It’s speed at x=4m will be (a) \(\begin{array}{l}\sqrt{3}\end{array} \) m/s (b) \(\begin{array}{l}2\sqrt{3}\end{array} \) m/s (c) 3 m/s (d) 4 m/s... View Article
12 identical rods made of same material are arranged in the form of a cube. The temperature of ‘p’ and ‘r’ are maintained at 90 and 30 repsectively. The temperature of ‘v’ in steady state is
12 identical rods made of the same material are arranged in the form of a cube. The temperature of ‘p’... View Article
A step down transformer reduces the voltage of transmission line from 2200 V to 220 V. The power delivered by it is 8800 W and its efficiency is 88%. The input current is
A step-down transformer reduces the voltage of the transmission line from 2200 V to 220 V. The power delivered by... View Article
A solid conducting sphere having a charge q is surrounded by an uncharged concentric conducting hollow spherical shell
A solid conducting sphere having a charge q is surrounded by an uncharged concentric conducting hollow spherical shell. Let the... View Article
An aircraft moves 400m towards north 300m towards west and then 1200m vertically upward then its displacement from the initial position is
An aircraft moves 400m towards the north, 300m towards the west, and then 1200m vertically upward. Then its displacement from... View Article
Is it easier to push or pull a body over a rough surface? Explain your answer.
We push or pull an object on a surface against the friction between the surface and the object. The frictional... View Article
In a wheatstone’s bridge all the four arms have equal resistance r. If the resistance of the galvanometer arm is also r, the equivalent resistance of the combination as seen by the battery is
In a Wheatstone’s bridge, all four arms have equal resistance r. If the resistance of the galvanometer arm is also... View Article
The emf of a cell is always greater than its terminal voltage. Why?
The EMF of a cell is greater than its terminal voltage because there is some potential drop across the cell... View Article
