Physics-
General
Easy
Question
The position–time (x–t) graphs for two children A and B returning from their school O to their homes P and Q respectively along straight line path (taken as x axis) are shown in figure below. Choose the correct statement (s):
- A lives closer to the school than B
- A starts from the school earlier than B
- A and B have equal average velocities from 0 to t0
- B overtakes A on the way
The correct answer is: A and B have equal average velocities from 0 to t0
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The graph shows position as a function of time for two trains running on parallel tracks Which statement is true?
The graph shows position as a function of time for two trains running on parallel tracks Which statement is true?
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Two blocks are arranged as shown in the figure. The relation between acceleration a1 and a2 is :
Two blocks are arranged as shown in the figure. The relation between acceleration a1 and a2 is :
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In figure shown on the right, the mass of the trolley is 100 kg, and it can move without friction on the horizontal floor. Its length is 12m. The mass of the girl is 50 kg. Friction exists between the shoes of the girl and the trolley’s upper surface, with 
= 1/3. The girl can run with a maximum speed = 9 m/s on the surface of the trolley, with respect to the surface. At t = 0 the girl starts running from rest to the right. The trolley was initially stationary.(g = 
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At a certain moment when the girl was accelerating, the earth frame acceleration of the trolley is found to be 1 m/s2 At this moment, the friction force between the girl’s shoes and the trolley’s surface is
In figure shown on the right, the mass of the trolley is 100 kg, and it can move without friction on the horizontal floor. Its length is 12m. The mass of the girl is 50 kg. Friction exists between the shoes of the girl and the trolley’s upper surface, with = 1/3. The girl can run with a maximum speed = 9 m/s on the surface of the trolley, with respect to the surface. At t = 0 the girl starts running from rest to the right. The trolley was initially stationary.(g = )
At a certain moment when the girl was accelerating, the earth frame acceleration of the trolley is found to be 1 m/s2 At this moment, the friction force between the girl’s shoes and the trolley’s surface is
physics-General
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In figure shown on the right, the mass of the trolley is 100 kg, and it can move without friction on the horizontal floor. Its length is 12m. The mass of the girl is 50 kg. Friction exists between the shoes of the girl and the trolley’s upper surface, with = 1/3. The girl can run with a maximum speed = 9 m/s on the surface of the trolley, with respect to the surface. At t = 0 the girl starts running from rest to the right. The trolley was initially stationary.(g = )
The minimum time in which the girl can stop from 9 m/s relative speed, to zero relative speed, without causing her shoes to slip is
In figure shown on the right, the mass of the trolley is 100 kg, and it can move without friction on the horizontal floor. Its length is 12m. The mass of the girl is 50 kg. Friction exists between the shoes of the girl and the trolley’s upper surface, with = 1/3. The girl can run with a maximum speed = 9 m/s on the surface of the trolley, with respect to the surface. At t = 0 the girl starts running from rest to the right. The trolley was initially stationary.(g = )
The minimum time in which the girl can stop from 9 m/s relative speed, to zero relative speed, without causing her shoes to slip is
physics-General
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In figure shown on the right, the mass of the trolley is 100 kg, and it can move without friction on the horizontal floor. Its length is 12m. The mass of the girl is 50 kg. Friction exists between the shoes of the girl and the trolley’s upper surface, with = 1/3. The girl can run with a maximum speed = 9 m/s on the surface of the trolley, with respect to the surface. At t = 0 the girl starts running from rest to the right. The trolley was initially stationary (g 
)
The total kinetic energy of system (trolley + girl) at the instant the girl acquires her maximum relative speed with respect to trolley, is
In figure shown on the right, the mass of the trolley is 100 kg, and it can move without friction on the horizontal floor. Its length is 12m. The mass of the girl is 50 kg. Friction exists between the shoes of the girl and the trolley’s upper surface, with = 1/3. The girl can run with a maximum speed = 9 m/s on the surface of the trolley, with respect to the surface. At t = 0 the girl starts running from rest to the right. The trolley was initially stationary (g )
The total kinetic energy of system (trolley + girl) at the instant the girl acquires her maximum relative speed with respect to trolley, is
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In figure shown on the right, the mass of the trolley is 100 kg, and it can move without friction on the horizontal floor. Its length is 12m. The mass of the girl is 50 kg. Friction exists between the shoes of the girl and the trolley’s upper surface, with = 1/3. The girl can run with a maximum speed = 9 m/s on the surface of the trolley, with respect to the surface. At t = 0 the girl starts running from rest to the right. The trolley was initially stationary.(g )
The minimum time in which the girl can acquire her maximum speed, for no slipping, is
In figure shown on the right, the mass of the trolley is 100 kg, and it can move without friction on the horizontal floor. Its length is 12m. The mass of the girl is 50 kg. Friction exists between the shoes of the girl and the trolley’s upper surface, with = 1/3. The girl can run with a maximum speed = 9 m/s on the surface of the trolley, with respect to the surface. At t = 0 the girl starts running from rest to the right. The trolley was initially stationary.(g )
The minimum time in which the girl can acquire her maximum speed, for no slipping, is
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Logic gates X and Y have the truth tables shown below
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Logic gates X and Y have the truth tables shown below
When the output of X is connected to the input of Y, the resulting combination is equivalent to a single.
physics-General
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The logic circuit shown below has the input waveforms ‘A’ and ‘B’ as shown. Pick out the correct output waveform
The logic circuit shown below has the input waveforms ‘A’ and ‘B’ as shown. Pick out the correct output waveform
physics-General
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Truth table for system of four NAND gates as shown in figure is :
Truth table for system of four NAND gates as shown in figure is :
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Which of the following truth tables is true?
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The following configuration of gates is equivalent to
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Figure shows the transfer characteristics of a base biased CE transistor Which of the following statements are true ?
A) At V1=0.4V transistor is in active state
B) At V1=1V it can be used as an amplifier
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D) At V1=2.5V, it can be used as a switch turned on
Figure shows the transfer characteristics of a base biased CE transistor Which of the following statements are true ?
A) At V1=0.4V transistor is in active state
B) At V1=1V it can be used as an amplifier
C) At V1=0.5V, It can be used as a switch turned off
D) At V1=2.5V, it can be used as a switch turned on
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I don’t like sports, _____________ does my dad.
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In the circuit, transistor has a current 
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In the diagram D an ideal diode and an alternating voltage of peak value 10V is connected as input V1 Which of the following diagram represents the correct waveform of output voltage 
?
In the diagram D an ideal diode and an alternating voltage of peak value 10V is connected as input V1 Which of the following diagram represents the correct waveform of output voltage ?
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