Physics-
General
Easy
Question
Statement-1 : A spherical surface of radius of curvature R separates two media of refractive index n1 and n2 as shown. If an object O (a thin small rod) is placed upright on principal axis at a distance R from pole (i.e., placed at centre of curvature), then the size of image is same as size of object.
Statement-2 : If a point object is placed at centre of curvature of spherical surface separating two media of different refractive index, then the image is also formed at centre of curvature, i.e., image distance is equal to object distance.
- Statement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-1
- Statement-1 is True, Statement-2 is True; Statement-2 is NOT a correct explanation for Statement-1
- Statement-1 is True, Statement-2 is False
- Statement-1 is False, Statement-2 is True.
The correct answer is: Statement-1 is False, Statement-2 is True.
Related Questions to study
physics-
Statement-1 : A ray is incident from outside on a glass sphere surrounded by air as shown. This ray may suffer total internal reflection at second interface.
Statement 2 : For a ray going from denser to rarer medium, the ray may suffer total internal reflection.
Statement-1 : A ray is incident from outside on a glass sphere surrounded by air as shown. This ray may suffer total internal reflection at second interface.
Statement 2 : For a ray going from denser to rarer medium, the ray may suffer total internal reflection.
physics-General
physics-
Statement-1 : A white parallel beam of light is incident on a plane glass-vacuum interface as shown. The beam may not undergo dispersion after suffering deviation at the interface (The beam is not incident normally on the interface.)
Statement 2 : Vacuum has same refractive index for all colours of white light
Statement-1 : A white parallel beam of light is incident on a plane glass-vacuum interface as shown. The beam may not undergo dispersion after suffering deviation at the interface (The beam is not incident normally on the interface.)
Statement 2 : Vacuum has same refractive index for all colours of white light
physics-General
physics-
For an LCR series circuit, phasors of current i and applied voltage 
are shown in diagram at t =0. Which of the following is/are correct?
For an LCR series circuit, phasors of current i and applied voltage are shown in diagram at t =0. Which of the following is/are correct?
physics-General
physics-
For the given circuit
For the given circuit
physics-General
physics-
A periodic voltage V varies with time t as shown in the figure. T is the time period. The r.m.s. value of the voltage is:-
A periodic voltage V varies with time t as shown in the figure. T is the time period. The r.m.s. value of the voltage is:-
physics-General
physics-
Figure shows a conducting rod of negligible resistance that can slide on smooth U-shaped rail made of wire of resistance 1
/m. Position of the conducting rod at t = 0 is shown. A time t dependent magnetic field B = 2t Tesla is switched on at t = 0
Figure shows a conducting rod of negligible resistance that can slide on smooth U-shaped rail made of wire of resistance 1/m. Position of the conducting rod at t = 0 is shown. A time t dependent magnetic field B = 2t Tesla is switched on at t = 0
physics-General
physics-
STATEMENT–1 : Consider the arrangement shown below. A smooth conducting rod, CD, is lying on a smooth U-shaped conducting wire making good electrical contact with it. The U-shape conducting wire is fixed and lies in horizontal plane. There is a uniform and constant magnetic field B in vertical direction (perpendicular to plane of page in figure). If the magnetic field strength is decreased, the rod moves towards right.
STATEMENT–2 : In the situation of statement-1, the direction in which the rod will slide is that which tends to maintain constant flux through the loop. Providing a larger loop area counteracts the decrease in magnetic flux. So the rod moves to the right independent of the fact that the direction of magnetic field is into the page or out of the page.
STATEMENT–1 : Consider the arrangement shown below. A smooth conducting rod, CD, is lying on a smooth U-shaped conducting wire making good electrical contact with it. The U-shape conducting wire is fixed and lies in horizontal plane. There is a uniform and constant magnetic field B in vertical direction (perpendicular to plane of page in figure). If the magnetic field strength is decreased, the rod moves towards right.
STATEMENT–2 : In the situation of statement-1, the direction in which the rod will slide is that which tends to maintain constant flux through the loop. Providing a larger loop area counteracts the decrease in magnetic flux. So the rod moves to the right independent of the fact that the direction of magnetic field is into the page or out of the page.
physics-General
physics-
Statement-1 : A resistance R is connected between the two ends of the parallel smooth conducting rails. A conducting rod lies on these fixed horizontal rails and a uniform constant magnetic field B exists perpendicular to the plane of the rails as shown in the figure. If the rod is given a velocity v and released as shown in figure, it will stop after some time. The total work done by magnetic field is negative.
Statement-2 : If force acts opposite to direction of velocity its work done is negative.
Statement-1 : A resistance R is connected between the two ends of the parallel smooth conducting rails. A conducting rod lies on these fixed horizontal rails and a uniform constant magnetic field B exists perpendicular to the plane of the rails as shown in the figure. If the rod is given a velocity v and released as shown in figure, it will stop after some time. The total work done by magnetic field is negative.
Statement-2 : If force acts opposite to direction of velocity its work done is negative.
physics-General
physics-
In the circuit diagram shown
In the circuit diagram shown
physics-General
physics-
A circuit consisting of a constant e.m.f. 'E', a self-induction 'L' and a resistance 'R' is closed at t = 0. The relation between the current I in the circuit and time t is as shown by curve 'a' in the figure. When one or more of parameters E, R & L are changed, the curve 'b' is obtained. The steady state current is same in both the cases. Then it is possible that
A circuit consisting of a constant e.m.f. 'E', a self-induction 'L' and a resistance 'R' is closed at t = 0. The relation between the current I in the circuit and time t is as shown by curve 'a' in the figure. When one or more of parameters E, R & L are changed, the curve 'b' is obtained. The steady state current is same in both the cases. Then it is possible that
physics-General
physics-
In the figure shown ‘R’ is a fixed conducting fixed ring of negligible resistance and radius ‘a’. PQ is a uniform rod of resistance r. It is hinged at the centre of the ring and rotated about this point in clockwise direction with a uniform angular velocity 
. There is a uniform magnetic field of strength ‘B’ pointing inwards. 
is a stationary resistance
In the figure shown ‘R’ is a fixed conducting fixed ring of negligible resistance and radius ‘a’. PQ is a uniform rod of resistance r. It is hinged at the centre of the ring and rotated about this point in clockwise direction with a uniform angular velocity . There is a uniform magnetic field of strength ‘B’ pointing inwards. is a stationary resistance
physics-General
physics-
A conducting rod of length 
is moved at constant velocity 
on two parallel, conducting, smooth, fixed rails, that are placed in a uniform constant magnetic field B perpendicular to the plane of the rails as shown in figure. A resistance R is connected between the two ends of the rail. Then which of the following is/are correct
A conducting rod of length is moved at constant velocity on two parallel, conducting, smooth, fixed rails, that are placed in a uniform constant magnetic field B perpendicular to the plane of the rails as shown in figure. A resistance R is connected between the two ends of the rail. Then which of the following is/are correct
physics-General
physics-
The P.E. of a particle executing SHM at a distance x from its equilibrium position is
The P.E. of a particle executing SHM at a distance x from its equilibrium position is
physics-General
physics-
A horizontal platform vibrates with simple harmonic motion in the horizontal direction with a period 2 s. A body of mass 0.5 kg is placed on the platform. The coefficient of static friction between the body and platform is 0.3. What is the maximum frictional force on the body when the platform is oscillating with amplitude 0.2 m? Assume 
A horizontal platform vibrates with simple harmonic motion in the horizontal direction with a period 2 s. A body of mass 0.5 kg is placed on the platform. The coefficient of static friction between the body and platform is 0.3. What is the maximum frictional force on the body when the platform is oscillating with amplitude 0.2 m? Assume
physics-General
physics-
In the figure, the vertical sections of the string are long. A is released from rest from the position shown. Then
In the figure, the vertical sections of the string are long. A is released from rest from the position shown. Then
physics-General
