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The power of a lens, ' P', is quantitatively defined as the reciprocal of its focal length, ' f', when 'f' is expressed in meters. Which of the following is the SI unit for the power of a lens?
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Correct Answer: Dioptre
Explanation:
The power of a lens P is defined as the reciprocal of its focal length f:
The SI unit of lens power is Dioptre (D).
Why other options are incorrect:
Watt – unit of power (mechanical/electrical), not lens power.
Candela – unit of luminous intensity.
Joule – unit of energy.
Therefore, the correct answer is Dioptre.
A boy throws a ball, applying an average force of 60 N at an angle of 60∘ to the horizontal. If the ball travels a horizontal distance of 20 m before being caught, what is the work done by this force on the ball?
Work done is calculated as:
So:
Convert Joules to Erg
In a MOSFET, if the gate and source terminals are swapped, then
Swapping gate and source in a MOSFET does not affect its operation as it is symmetric with respect to these terminals.
According to the National Crime Records Bureau (NCRB) report for 2022, which Union Territory or state registered the highest rate of cognizable crimes per one lakh (100,000) population, significantly surpassing the national average?
Correct Answer: Delhi
According to the NCRB Crime in India Report 2022,
Delhi recorded the highest rate of cognizable crimes per 1 lakh population, far above the national average.
This makes Delhi the correct answer among the given options.
Let's solve it clearly.
Given:
So,
Construct a right triangle:
Opposite = 2
Adjacent = 3
Therefore,
Now evaluate:
Compute numerator:
So numerator:
Denominator doesn't matter because numerator = 0
✅ Correct Answer: 0
Consider a celestial body with mass M and radius R. If G G represents the universal gravitational constant and g is the acceleration due to gravity on its surface, what are the SI units of the ratio G/g?
Calculate the missing number in the following sequence: 145, 234, 312, ___, 542.
By analyzing the pattern of the sequence, the correct number that fits in the blank is 412.
When a software application fails to perform its intended function, produces incorrect or unexpected outputs, or crashes due to an error in its design or implementation code, what specific term is universally used within computer science and programming to describe this underlying flaw?
Correct Answer: A software bug
When a software program does not work as intended due to an error in its design or implementation, that flaw is universally called a software bug. It may cause incorrect output, unexpected behavior, or crashes.
The other options describe different issues but not coding flaws.
In the final of the 2023-24 Ranji Trophy, which culminated in March 2024, a team secured its record-extending 42nd title by defeating Vidarbha by a significant margin of 169 runs. Which team clinched this historic championship?
Correct Answer: Mumbai
In the 2023–24 Ranji Trophy final, held in March 2024, Mumbai defeated Vidarbha by 169 runs to win their record-extending 42nd Ranji Trophy title.
The maximum rate that an output of an operational amplifier can change
Correct Answer: Slew rate
The slew rate of an operational amplifier (op-amp) is defined as the maximum rate at which the output voltage can change, usually measured in volts per microsecond (V/µs).
Thus, the correct answer is Slew rate.
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