Work, Energy and Power Test

Result

Work, Energy and Power Test - 76

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Weekly Quiz Competition

Question 1
4 / -1

Assertion Power of machine gun in determined by both, the number of bullet fired per second and kinetic energy of bullets.
Reason Power of any machine is defined as work done (by it) per unit time.

A
If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

B
If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion

C
If Assertion is true but Reason is false.

D
If the Assertion and Reason both are false

E
If Assertion is false but Reason is true.
Question 2
4 / -1

Assertion According to law of conservation of mechanical energy change in potential energy is equal and opposite to the change in kinetic energy.
Reason Mechanical energy is not a conserved quantity.

A
If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

B
If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion.

C
If Assertion is true but Reason is false.

D
If the Assertion and Reason both are false

E
If Assertion is false but Reason is true.
Question 3
4 / -1

Assertion When the force retards the motion of a body, the work down is zero.
Reason Work done depends on angle between force and displacement.

A
If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

B
If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion.

C
If Assertion is true but Reason is false.

D
If the Assertion and Reason both are false

E
If Assertion is false but Reason is true.
Question 4
4 / -1

Assertion In an elastic collision of two bodies, the momentum and energy of each body is conserved.
Reason If two bodies stick to each other, after colliding, the collision is said to be perfectly elastic.

A
If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

B
If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion.

C
If Assertion is true but Reason is false.

D
If the Assertion and Reason both are false

E
If Assertion is false but Reason is true.
Question 5
4 / -1

Assertion In case of bullet fired from gun, the ratio of kinetic energy of gun and bullet is equal to ratio of mass of bullet and gun.
Reason In firing, momentum is conserved.

A
If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

B
If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion.

C
If Assertion is true but Reason is false

D
If the Assertion and Reason both are false

E
If Assertion is false but Reason is true.

Solution
Question 6
4 / -1

Assertion Power developed in circular motion is always zero.
Reason Work done in case of circular motion is zero.

A
If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

B
If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion

C
If Assertion is true but Reason is false.

D
If the Assertion and Reason both are false

E
If Assertion is false but Reason is true.
Question 7
4 / -1

Assertion Kinetic energy of a body is quadrupled, when its velocity is doubled.
Reason Kinetic energy is proportional to square of velocity.

A
If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

B
If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion.

C
If Assertion is true but Reason is false.

D
If the Assertion and Reason both are false

E
If Assertion is false but Reason is true.

Solution
Question 8
4 / -1

Assertion A quick collision between two bodies is more violent than slow collision, even when initial and final velocities are identical.
Reason The rate of change of momentum determines that force is small or large

A
If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

B
If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion.

C
If Assertion is true but Reason is false.

D
If the Assertion and Reason both are false

E
If Assertion is false but Reason is true.
Question 9
4 / -1

Assertion Work done by or against gravitational force in moving a body from one point to another is independent of the actual path followed between the two points.
Reason Gravitational forces are conservation forces.

A
If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

B
If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion.

C
If Assertion is true but Reason is false.

D
If the Assertion and Reason both are false

E
If Assertion is false but Reason is true.
Question 10
4 / -1

Assertion Wire through which current flows gets heated.
Reason When current is drawn from a cell, chemical energy is converted into heat energy.

A
If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

B
If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion.

C
If Assertion is true but Reason is false.

D
If the Assertion and Reason both are false

E
If Assertion is false but Reason is true.

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Question Analysis

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Re-Attempt Weekly Quiz Competition

Work, Energy and Power Test - 76

Result

Work, Energy and Power Test - 76

Score

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Rank

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SHARING IS CARING

Question 1

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion

If Assertion is true but Reason is false.

If the Assertion and Reason both are false

If Assertion is false but Reason is true.

Question 2

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion.

If Assertion is true but Reason is false.

If the Assertion and Reason both are false

If Assertion is false but Reason is true.

Question 3

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion.

If Assertion is true but Reason is false.

If the Assertion and Reason both are false

If Assertion is false but Reason is true.

Question 4

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion.

If Assertion is true but Reason is false.

If the Assertion and Reason both are false

If Assertion is false but Reason is true.

Question 5

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion.

If Assertion is true but Reason is false

If the Assertion and Reason both are false

If Assertion is false but Reason is true.

Solution

Question 6

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion

If Assertion is true but Reason is false.

If the Assertion and Reason both are false

If Assertion is false but Reason is true.

Question 7

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion.

If Assertion is true but Reason is false.

If the Assertion and Reason both are false

If Assertion is false but Reason is true.

Solution

Question 8

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion.

If Assertion is true but Reason is false.

If the Assertion and Reason both are false

If Assertion is false but Reason is true.

Question 9

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion.

If Assertion is true but Reason is false.

If the Assertion and Reason both are false

If Assertion is false but Reason is true.

Question 10

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion.

If Assertion is true but Reason is false.

If the Assertion and Reason both are false

If Assertion is false but Reason is true.

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Question Analysis

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Score

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Rank

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