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 11 Discuss
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How long will a sound wave take to travel 1.5 km, which has a frequency of 5 kHz and wavelength of 6 cm?

A
2.5 seconds
B
50 seconds
C
5 seconds
D
25 seconds

Answer & Explanation

Correct Option: C

Velocity = frequency × wavelength (5000 Hz × 0.06 m = 300 m/s); time = distance / velocity (1500 m / 300 m/s = 5 seconds).
Question 12 Discuss
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Which of the following is the correct relationship?

A
F = a/m
B
F = m/a
C
F = m2a
D
F = ma

Answer & Explanation

Correct Option: D

Newton's Second Law of Motion states that force is the product of mass and acceleration, mathematically expressed as F=ma.
Question 13 Discuss
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Which is the nearest planet to the Sun?

A
Uranus
B
Jupiter
C
Mercury
D
Saturn

Answer & Explanation

Correct Option: C

Mercury is the smallest and innermost planet in our Solar System, orbiting the Sun at an average distance of about 58 million kilometers.
Question 14 Discuss
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Which of the following units is NOT associated with the work of these scientists regarding force?

A
John Dalton
B
Amedeo Avogadro
C
Albert Einstein
D
James Watt

Answer & Explanation

Correct Option: D

James Watt is associated with the unit of Power (Watt), whereas force is measured in Newtons; the question refers to unit applicability.
Question 15 Discuss
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Which of the following statements is correct?

A
Mars is the warmest planet.
B
The size of Jupiter and Mars is similar.
C
The size of Earth and Venus is almost similar.
D
The density of Saturn is similar to that of Earth.

Answer & Explanation

Correct Option: C

Venus is often called Earth's twin because of its similar size, mass, and density, though its atmosphere and surface temperature differ significantly.
Question 16 Discuss
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For which of the following discoveries in 1827 was the German physicist, Georg Simon Ohm best known?

A
For clarifying the mathematical relationship between electrical current, resistance and voltage
B
For measuring the magnetic properties of nuclear particles
C
For invention of the magnetometer, which is a device capable of measuring the direction and strength of a magnetic field
D
For developing a device capable of amplifying and modulating electromagnetic signals that could also function as an oscillator

Answer & Explanation

Correct Option: A

In 1827, Ohm published 'The Galvanic Circuit Investigated Mathematically,' establishing the law (V=IR) that bears his name.
Question 17 Discuss
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Which device is used to measure the current flow using needle deflection caused by a magnetic field force acting upon a current carrying wire?

A
Galvanometer
B
Psophometer
C
Potentiometer
D
Ammeter

Answer & Explanation

Correct Option: A

A galvanometer is a sensitive instrument that detects and measures small electric currents by utilizing the magnetic torque produced by the current.
Question 18 Discuss
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In an electrical circuit, the ammeter reading decreases to when the length of the wire is doubled.

A
one-sixth
B
one-half
C
one-fourth
D
one-third

Answer & Explanation

Correct Option: B

Resistance is directly proportional to length; doubling the length doubles the resistance, which halves the current (ammeter reading) according to Ohm's Law.
Question 19 Discuss
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Who proposed that 'Light is made up of waves propagating perpendicular to the direction of its movement'?

A
Newton
B
Huygens
C
Kepler
D
Pauli

Answer & Explanation

Correct Option: B

Christiaan Huygens proposed the wave theory of light in 1678, arguing that light behaves like a wave traveling through a medium.
Question 20 Discuss
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What is the wavelength range of visible light?

A
0.2 to 0.3𝜇 m
B
0.7 to 0.9𝜇 m
C
0.4 to 0.7𝜇 m
D
1 to 2𝜇 m

Answer & Explanation

Correct Option: C

The human eye is sensitive to electromagnetic radiation in the range of approximately 400 nm to 700 nm (0.4 to 0.7 micrometers).
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