Physics-
General
Easy
Question
A ray of light strikes a corner reflector as shown in figure. As the angle of incidence q is increased, the angle between the final reflected ray and the incident ray
- increases
- decreases
- remains the same
- Information are insufficient to decide
The correct answer is: increases
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A ball of mass m is attached to a rigid vertical rod by means of two massless strings with length L. The strings are attached to the rod at points a distance L apart (see Figure). The system is rotating about the axis of the rod, both strings being taut and forming an equilateral triangle. The tension in the upper string is T1
A ball of mass m is attached to a rigid vertical rod by means of two massless strings with length L. The strings are attached to the rod at points a distance L apart (see Figure). The system is rotating about the axis of the rod, both strings being taut and forming an equilateral triangle. The tension in the upper string is T1
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Two identical resistors with resistance R are connected in the two circuits drawn. The battery in both circuits is a 12 volt ideal battery. Which statement is correct?
Two identical resistors with resistance R are connected in the two circuits drawn. The battery in both circuits is a 12 volt ideal battery. Which statement is correct?
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The equivalent resistance between the terminal points A and B in the network shown in figure is
The equivalent resistance between the terminal points A and B in the network shown in figure is
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A hollow conducting sphere of inner radius R and outer radius 2R has resistivity '
' a function of the distance 'r' from the centre of the sphere: 
. The inner and outer surfaces are painted with a perfectly conducting 'paint' and a potential difference 
is applied between the two surfaces. Then, as 'r' increases from R to 2R, the electric field inside the sphere
A hollow conducting sphere of inner radius R and outer radius 2R has resistivity '' a function of the distance 'r' from the centre of the sphere: . The inner and outer surfaces are painted with a perfectly conducting 'paint' and a potential difference is applied between the two surfaces. Then, as 'r' increases from R to 2R, the electric field inside the sphere
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If I = 80 mA, determine the magnitude of the current in the 
resistor
If I = 80 mA, determine the magnitude of the current in the resistor
physics-General
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Four wires A, B, C and D are made of different materials. They each carry the same current I. Wire B has twice the length of other wires. Wire C has twice the internal electric field of other wires. Wire D has twice the diameter of other wires. Other than these differences, all wires share identical characteristics. Rank the conductivities of these materials, from greatest to least
Four wires A, B, C and D are made of different materials. They each carry the same current I. Wire B has twice the length of other wires. Wire C has twice the internal electric field of other wires. Wire D has twice the diameter of other wires. Other than these differences, all wires share identical characteristics. Rank the conductivities of these materials, from greatest to least
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A hollow cylinder with inner radius R, outer radius 2R mass M is rolling with speed of its axis v. Its kinetic energy is
A hollow cylinder with inner radius R, outer radius 2R mass M is rolling with speed of its axis v. Its kinetic energy is
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Four identical bulbs each rated 100 watts, 220 volts are connected across a battery as shown. The power consumed by them is:
Four identical bulbs each rated 100 watts, 220 volts are connected across a battery as shown. The power consumed by them is:
physics-General
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Resistors R1 and R2 have an equivalent resistance of 6 ohms when connected in the circuit shown below. The resistance of R1 could be
Resistors R1 and R2 have an equivalent resistance of 6 ohms when connected in the circuit shown below. The resistance of R1 could be
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In the two circuits shown, all the light bulbs and batteries are identical. If A, B and C respectively denotes the brightness of light bulbs A, B & C then
In the two circuits shown, all the light bulbs and batteries are identical. If A, B and C respectively denotes the brightness of light bulbs A, B & C then
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Two strings support a uniform rod as shown. String at end B is cut. Which of the following is true just after cut
I] initial acceleration of A is vertical
II] initial acceleration of A is horizontal
III] initial acceleration of centre of mass of rod is vertical
IV] initial acceleration of centre of mass of rod is horizontal
Two strings support a uniform rod as shown. String at end B is cut. Which of the following is true just after cut
I] initial acceleration of A is vertical
II] initial acceleration of A is horizontal
III] initial acceleration of centre of mass of rod is vertical
IV] initial acceleration of centre of mass of rod is horizontal
physics-General
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The potential of point O in the steady state circuit shown on the right is
The potential of point O in the steady state circuit shown on the right is
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A mass is at the center of a square, with four masses at the corners as shown.
Rank the choices according to the magnitude of the gravitational force on the center mass.
A mass is at the center of a square, with four masses at the corners as shown.
Rank the choices according to the magnitude of the gravitational force on the center mass.
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In the figure shown the electric potential energy of the system is (q is at the centre of the conducting neutral spherical shell of inner radius a and outer radius b)
In the figure shown the electric potential energy of the system is (q is at the centre of the conducting neutral spherical shell of inner radius a and outer radius b)
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The diagram shows three concentric conducting spherical shells having radii T, 2R and 3R. The initial potential of each shell is as mentioned in the figure. If the inner most shell is earth then the charge present on its outer surface would be equal to
The diagram shows three concentric conducting spherical shells having radii T, 2R and 3R. The initial potential of each shell is as mentioned in the figure. If the inner most shell is earth then the charge present on its outer surface would be equal to
physics-General
