Physics-
General
Easy
Question
The potential energy of a particle varies with distance x as shown in the graph. The force acting on the particle is zero at :
- C
- B
- B and C
- A and D
The correct answer is: B
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Physics-
From a waterfall, water is falling down at the rate of 100 kg/s on the blades of turbine. If the height of the fall is 100 m, then the power delivered to the turbine is approximately equal to:
From a waterfall, water is falling down at the rate of 100 kg/s on the blades of turbine. If the height of the fall is 100 m, then the power delivered to the turbine is approximately equal to:
Physics-General
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Which of the following is not an example of perfectly inelastic collision:
Which of the following is not an example of perfectly inelastic collision:
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Assertion : Speed of wave = Wave length / Time period
Reason : Wave length is the distance between two nearest particles in phase
Assertion : Speed of wave = Wave length / Time period
Reason : Wave length is the distance between two nearest particles in phase
Physics-General
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Assertion : When we start filling an empty bucket with water, the pitch of sound produced goes on decreasing
Reason : The frequency of man voice is usually higher than that of woman
Assertion : When we start filling an empty bucket with water, the pitch of sound produced goes on decreasing
Reason : The frequency of man voice is usually higher than that of woman
Physics-General
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Decibel is unit of
Decibel is unit of
Physics-General
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A bar magnet of magnetic moment 3.0 A-m2 is placed in a uniform magnetic induction field of 2 × 10–5 T. If each pole of the magnet experiences a force of 6 x 10–4 N, the length of the magnet is
A bar magnet of magnetic moment 3.0 A-m2 is placed in a uniform magnetic induction field of 2 × 10–5 T. If each pole of the magnet experiences a force of 6 x 10–4 N, the length of the magnet is
Physics-General
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If a bar magnet of magnetic moment M is freely suspended in a uniform magnetic field of strength B, the work done in rotating the magnet through an angle 
is
If a bar magnet of magnetic moment M is freely suspended in a uniform magnetic field of strength B, the work done in rotating the magnet through an angle is
Physics-General
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A very small magnet is placed in the magnetic meridian with its south pole pointing north. The null point is obtained 20 cm away from the centre of the magnet. If the earth’s magnetic field (horizontal component) at this point be 0.3 gauss, the magnetic moment of the magnet is
A very small magnet is placed in the magnetic meridian with its south pole pointing north. The null point is obtained 20 cm away from the centre of the magnet. If the earth’s magnetic field (horizontal component) at this point be 0.3 gauss, the magnetic moment of the magnet is
Physics-General
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The figure below shows the north and south poles of a permanent magnet in which n turn coil of area of cross-section A is resting, such that for a current i passed through the coil, the plane of the coil makes an angle q with respect to the direction of magnetic field B. If the plane of the magnetic field and the coil are horizontal and vertical respectively, the torque on the coil will be
The figure below shows the north and south poles of a permanent magnet in which n turn coil of area of cross-section A is resting, such that for a current i passed through the coil, the plane of the coil makes an angle q with respect to the direction of magnetic field B. If the plane of the magnetic field and the coil are horizontal and vertical respectively, the torque on the coil will be
Physics-General
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Magnetic intensity for an axial point due to a short bar magnet of magnetic moment M is given by
Magnetic intensity for an axial point due to a short bar magnet of magnetic moment M is given by
Physics-General
Chemistry-
60% of a first order reaction was completed in 60 min. The time taken for reactants to decompose to half of their original amount will be
60% of a first order reaction was completed in 60 min. The time taken for reactants to decompose to half of their original amount will be
Chemistry-General
Chemistry-
For a hypothetical reaction: 
Products, the rate law is 
. The order of reaction is
For a hypothetical reaction: Products, the rate law is . The order of reaction is
Chemistry-General
Chemistry-
For the chemical reaction 
, the rate of the reaction is doubled when the concentration of B was doubled, and when the concentration, of both A and B was doubled rate become doubled and when the concentration of both B and C was doubled rate become quadrupled. What is the order with respect to A, B, and C and the total order?
For the chemical reaction , the rate of the reaction is doubled when the concentration of B was doubled, and when the concentration, of both A and B was doubled rate become doubled and when the concentration of both B and C was doubled rate become quadrupled. What is the order with respect to A, B, and C and the total order?
Chemistry-General
Chemistry-
In a multistep reaction such as 
,
for the reaction 
which statement is true?
In a multistep reaction such as , for the reaction which statement is true?
Chemistry-General
Chemistry-
The efficiency of an enzyme in catalyzing a reaction is due to its capacity
The efficiency of an enzyme in catalyzing a reaction is due to its capacity
Chemistry-General
