Physics-
General
Easy
Question
An endless inextensible string passes over two small smooth pegs A and B, AB being horizontal, two particles of mass M and m (M > m) are attached to the string. The particle of mass m is released when it is in level with the pegs. As it comes down M rises up vertically. If and when they cross each other
- the speed of M > the speed of m
- the speed of M = the speed of m
- the speed of M < the speed of m
- the ratio of their speeds is
The correct answer is: the speed of M = the speed of m
Related Questions to study
physics-
A ray of light parallel to the axis of a converging lens (having focal length f) strikes it at a small distance ‘h’ from its optical centre. A thin prism having angle q and refractive index m is placed normal to the axis of lens at a distance ‘d’ from it. What should be the value of m so that the ray emerges parallel to the lens axis.
A ray of light parallel to the axis of a converging lens (having focal length f) strikes it at a small distance ‘h’ from its optical centre. A thin prism having angle q and refractive index m is placed normal to the axis of lens at a distance ‘d’ from it. What should be the value of m so that the ray emerges parallel to the lens axis.
physics-General
physics-
An observer looks down on two glass plates, one placed on top of the other. The top plate pivots about a line of contact at its edge as shown in the figure. The angle created by the pivoting motion increases in time. Which is true?
An observer looks down on two glass plates, one placed on top of the other. The top plate pivots about a line of contact at its edge as shown in the figure. The angle created by the pivoting motion increases in time. Which is true?
physics-General
Physics-
Gap between two positions of the lens is
Gap between two positions of the lens is
Physics-General
physics-
The load versus elongation graph for four wires of the same material is shown in the figure. The thinnest wire is represented by the line
The load versus elongation graph for four wires of the same material is shown in the figure. The thinnest wire is represented by the line
physics-General
physics-
From the circuit shown below, the maximum and minimum values of zener diode current are
From the circuit shown below, the maximum and minimum values of zener diode current are
physics-General
physics-
In the figure shown, the potential drop across each capacitor is (assume diodes to be ideal)
In the figure shown, the potential drop across each capacitor is (assume diodes to be ideal)
physics-General
Physics-
The I-V characteristic of an LED is
The I-V characteristic of an LED is
Physics-General
physics-
In the figure, the input is across terminals A and C and the output is across B and D. Then the output is
In the figure, the input is across terminals A and C and the output is across B and D. Then the output is
physics-General
physics-
A p–n junction (D) shown in the figure can act as a rectifier. An alternating current source (V) is connected in the circuit
A p–n junction (D) shown in the figure can act as a rectifier. An alternating current source (V) is connected in the circuit
physics-General
physics-
The equivalent resistance between A and B is
The equivalent resistance between A and B is
physics-General
physics-
The equivalent resistance of the circuit across AB is given by
The equivalent resistance of the circuit across AB is given by
physics-General
physics-
Find the effective resistance between A & B
Find the effective resistance between A & B
physics-General
physics-
4 ideal diodes are connected as shown in the circuit the current through 50W is
4 ideal diodes are connected as shown in the circuit the current through 50W is
physics-General
physics-
The circuit shown in figure (A) Contains two diodes each with a forward resistance of 50 ohm and with infinite reverse resistance. If the battery voltage is 6 V, the current through the 100 ohm resistance is.
The circuit shown in figure (A) Contains two diodes each with a forward resistance of 50 ohm and with infinite reverse resistance. If the battery voltage is 6 V, the current through the 100 ohm resistance is.
physics-General
physics-
A PN junction diode when forward biased has a drop of 0.5V which is assumed to be independent of current. The current in excess of 10mA through the diode produces large joule heating which damages the diode. If we want to use a 1.5V battery to forward bias the diode, the resistor used in series with the diode so that the maximum current does not exceed 5mA is
A PN junction diode when forward biased has a drop of 0.5V which is assumed to be independent of current. The current in excess of 10mA through the diode produces large joule heating which damages the diode. If we want to use a 1.5V battery to forward bias the diode, the resistor used in series with the diode so that the maximum current does not exceed 5mA is
physics-General
