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Science Write the Correct Alternative.

Work and Energy · Maharashtra Board STD 9 (MSBSHSE - Semi English Medium). 24 questions.

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Write the Correct Alternative.

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24 questions · auto-graded multiple-choice test.

MCQ 11 Mark
When some unstable atoms break up, they release a tremendous amount of …………………… energy.
  • A
    chemical
  • B
    potential
  • ✓
    nuclear
  • D
    mechanical
Answer
Correct option: C.
nuclear
nuclear
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MCQ 21 Mark
The work done by a force is said to be …………………… when the applied force does not produce displacement.
  • A
    positive
  • B
    negative
  • ✓
    zero
  • D
    none of these
Answer
Correct option: C.
zero
zero
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MCQ 31 Mark
$1 kWh =$ …………………… joules.
  • A
    $3.6 \times 10^3$
  • ✓
    $3.6 \times 10^6$
  • C
    $6.3 \times 10^6$
  • D
    $6.3 \times 10^3$
Answer
Correct option: B.
$3.6 \times 10^6$
$3.6 \times 10^6$
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MCQ 41 Mark
…………………… is the commercial unit of power.
  • A
    kilowatt second
  • B
    dyne
  • ✓
    kilowatt
  • D
    erg
Answer
Correct option: C.
kilowatt
kilowatt
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MCQ 51 Mark
1 hp = ………………….. .
  • A
    476 watts
  • ✓
    746 watts
  • C
    674 watts
  • D
    764 watts
Answer
Correct option: B.
746 watts
746 watts
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MCQ 61 Mark
Potential energy of a body is given by $(P.E.) =$ ………………….. .
  • A
    $Fs$
  • ✓
    $mgh$
  • C
    $ma$
  • D
    $mv^2$
Answer
Correct option: B.
$mgh$
mgh
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MCQ 71 Mark
Kinetic energy of a body $(KE) = ………………….. .$
  • A
    $mv^2$
  • ✓
    $\frac{1}{2} mv^2$
  • C
    $mgh$
  • D
    $Fs$
Answer
Correct option: B.
$\frac{1}{2} mv^2$
$\frac{1}{2} mv^2$
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MCQ 81 Mark
…………………… is the capacity to do work.
  • ✓
    Energy
  • B
    Force
  • C
    Power
  • D
    Momentum
Answer
Correct option: A.
Energy
Energy
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MCQ 91 Mark
S.I. unit of work is ………………….. .
  • A
    dyne
  • B
    newton-meter or erg
  • C
    N/m2 or joule
  • ✓
    newton-meter or joule
Answer
Correct option: D.
newton-meter or joule
newton-meter or joule
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MCQ 101 Mark
Work is the product of ………………….. .
  • A
    force and distance
  • B
    displacement and velocity
  • C
    kinetic and potential energy
  • ✓
    force and displacement
Answer
Correct option: D.
force and displacement
force and displacement
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MCQ 111 Mark
S.I. unit of energy is ………………….. .
  • ✓
    Joule
  • B
    Ergs
  • C
    m/s
  • D
    Both A and B
Answer
Correct option: A.
Joule
Joule
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MCQ 121 Mark
Work and …………………… have the same unit.
  • ✓
    Energy
  • B
    Electricity
  • C
    Force
  • D
    Both B and C
Answer
Correct option: A.
Energy
Energy
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MCQ 131 Mark
Energy can neither be ………………. nor ……………… .
  • A
    Destroyed
  • B
    Created
  • C
    Saved
  • ✓
    Both A and B
Answer
Correct option: D.
Both A and B
Both A and B
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MCQ 141 Mark
For a freely falling body, kinetic energy is ………………. at the ground level.
  • ✓
    Maximum
  • B
    Minimum
  • C
    Neutral
  • D
    Reversed
Answer
Correct option: A.
Maximum
Maximum
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MCQ 151 Mark
………………. is the unit of force.
  • ✓
    Both B and C
  • B
    Newton
  • C
    Dyne
  • D
    Volts
Answer
Correct option: A.
Both B and C
Both B and C
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MCQ 161 Mark
By stretching the rubber strings of a we store ………………. energy in it.
  • ✓
    Potential
  • B
    Chemical
  • C
    Electric
  • D
    Kinetic
Answer
Correct option: A.
Potential
Potential
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MCQ 171 Mark
Flowing water has ………………. energy.
  • A
    Potential
  • B
    Chemical
  • C
    Solar
  • ✓
    Kinetic
Answer
Correct option: D.
Kinetic
Kinetic
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MCQ 181 Mark
The work done is zero if there is no ……………… .
  • A
    Direction
  • ✓
    Displacement
  • C
    Mass
  • D
    Angle
Answer
Correct option: B.
Displacement
Displacement
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MCQ 191 Mark
The energy stored in the dry cell is in of ………………. energy.
  • A
    Light
  • ✓
    Chemical
  • C
    Solar
  • D
    Kinetic
Answer
Correct option: B.
Chemical
Chemical
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MCQ 211 Mark
Work is said to be done on a body when a …………………… is applied on object causes displacement of the object.
  • A
    Direction
  • B
    Area
  • C
    Volume
  • ✓
    Force
Answer
Correct option: D.
Force
Force
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MCQ 221 Mark
Example of Non-contact force is ………………….. .
  • A
    Mechanical Force
  • B
    Frictional Force
  • C
    Muscular Force
  • ✓
    Electrostatic Force
Answer
Correct option: D.
Electrostatic Force
Electrostatic Force
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MCQ 231 Mark
Example of Contact force is ………………….. .
  • A
    Gravitational Force
  • B
    Magnetic Force
  • C
    Electrostatic Force
  • ✓
    Muscular Force
Answer
Correct option: D.
Muscular Force
Muscular Force
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Write the Correct Alternative. - Science STD 9 Questions - Vidyadip