General Science Jkssb Physics Set 1 Mcqs (448 MCQs) | JKSSB & SSC Quiz

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jkssb physics set 1 mcqs

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Practice Questions

448 Total
Question 401 Discuss
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A body starts from rest and moves with a uniform acceleration. The ratio of the distance covered in the 1st second to the 2nd second is:

A
1:2
B
1:3
C
1:4
D
2:3

Answer & Explanation

Correct Option: B

Distance in $n^{th}$ second is $u + a/2(2n-1)$. For $u=0$, ratio is $(2(1)-1) : (2(2)-1) = 1:3$.
Question 402 Discuss
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The resistance of an ideal ammeter should be:

A
very high
B
very low
C
zero
D
infinite

Answer & Explanation

Correct Option: C

An ideal ammeter must have zero resistance so that it does not alter the current it is meant to measure in the circuit.
Question 403 Discuss
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In the process of nuclear fission, energy is released because:

A
total mass of products is less than parent nucleus
B
total mass of products is more than parent nucleus
C
neutrons are destroyed
D
protons are converted to neutrons

Answer & Explanation

Correct Option: A

The 'mass defect' between reactants and products is converted into energy according to $E=mc^2$.
Question 404 Discuss
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Which of the following electromagnetic waves has the highest frequency?

A
ultraviolet rays
B
gamma rays
C
radio waves
D
microwaves

Answer & Explanation

Correct Option: B

Gamma rays are at the highest frequency (shortest wavelength) end of the electromagnetic spectrum.
Question 405 Discuss
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The property of a material by which it can be drawn into thin wires is called:

A
malleability
B
ductility
C
brittleness
D
elasticity

Answer & Explanation

Correct Option: B

Ductility is the physical property of a metal that allows it to be stretched into a wire without breaking.
Question 406 Discuss
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A magnifying glass comprises a simple:

A
convex lens
B
concave lens
C
convex mirror
D
concave mirror

Answer & Explanation

Correct Option: A

A convex lens acts as a magnifying glass when the object is placed within its focal length, creating a virtual enlarged image.
Question 407 Discuss
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Surface tension in a liquid is due to:

A
adhesive force between molecules
B
cohesive force between molecules
C
gravitational force
D
atmospheric pressure

Answer & Explanation

Correct Option: B

Cohesive forces between like molecules at the surface pull them inward, creating a 'skin' effect.
Question 408 Discuss
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The work done in moving a unit positive charge from one point to another in an electric circuit is called:

A
electric current
B
potential difference
C
resistance
D
capacitance

Answer & Explanation

Correct Option: B

Potential difference ($V$) is defined as $W/Q$, the energy transferred per unit charge.
Question 409 Discuss
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An example of a longitudinal wave is:

A
light wave
B
radio wave
C
sound wave
D
gamma rays

Answer & Explanation

Correct Option: C

In sound waves, the particles of the medium vibrate parallel to the direction of wave propagation.
Question 410 Discuss
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The intensity of an earthquake is measured using a:

A
barometer
B
hydrometer
C
seismograph
D
polygraph

Answer & Explanation

Correct Option: C

A seismograph records the magnitude and duration of seismic waves produced by an earthquake.
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