AP EAMCET · PHYSICS · Thermodynamics
An electrical refrigerator with \(\beta=5\) extracts \(5000 \mathrm{~J}\) from the contents of the refrigerator. During this process, find the electrical energy utilised by its motor.
- A \(1 \mathrm{~kJ}\)
- B \(0.5 \mathrm{~kJ}\)
- C \(0.8 \mathrm{~kJ}\)
- D \(1.2 \mathrm{~kJ}\)
Answer & Solution
Correct Answer
(A) \(1 \mathrm{~kJ}\)
Step-by-step Solution
Detailed explanation
Coefficient of performance of refrigerator, \[ \beta=5 \] Amount of heat removed, \[ Q=5000 \mathrm{~J} \] Electrical energy utilised by the motor…
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from PHYSICS
- As shown in the figure, a light uniform rod PQ of length 150 cm is suspended from the ceiling horizontally using two metal wires \(A\) and \(B\) tied to the ends of the rod. The ratios of the radii and the Young's moduli of the materials of the two wires \(A\) and \(B\) are respectively \(2: 3\) and \(3: 2\). The position at which a weight should be suspended from the rod such that the elongations of the two wires become equal is
AP EAMCET 2025 Medium - The energy of a parallel plate capacitor when connected to a battery is \(E\). With the battery still in connection, if the plates of the capacitor are separated, so that the distance between them is twice the original distance, then the electrostatic energy becomesAP EAMCET 2015 Hard
- Two blocks of ice when pressed together join to form one block becauseAP EAMCET 2020 Easy
- The coefficient of restitution for a perfect elastic collision isAP EAMCET 2021 Easy
- An insect is crawling in a hemi-spherical bowl of radius ' \(R\) '. If the coefficient of friction between the insect and bowl is ' \(\mu\) ', then the maximum height to which tile insect can crawl the bowl isAP EAMCET 2024 Medium
- An object is in equilibrium when four concurrent forces, acting in the same plane are in the directions shown in the figure.
Find the magnitudes of \(F_1\) and \(F_2\).
AP EAMCET 2021 Medium
More PYQs from AP EAMCET
- The number of nucleophiles in the following list is \(\mathrm{CH}_3 \mathrm{NH}_2, \mathrm{CH}_3 \mathrm{CHO}, \mathrm{C}_2 \mathrm{H}_4, \mathrm{CH}_3 \mathrm{SH}\)AP EAMCET 2024 Medium
- An unbiased coin is tossed to get 2 points for turning up a head and one point for the tail. If three unbiased coins are tossed simultaneously, then the probability of getting a total of odd number of points isAP EAMCET 2004 Medium
- Which of the following is the best container for a gas during adiabatic process?AP EAMCET 2021 Easy
- If the tangent to the curve \(x^{2 / 3}+y^{2 / 3}=a^{2 / 3}\) meets the \(X\)-axis at \(A\) and \(Y\)-axis at \(B\), then \(A B=\)AP EAMCET 2020 Medium
- In an adsorption experiment, a graph between versus was found to be linear with a slope of . The intercept on axis was found to be . The amount of gas adsorbed per gram of charcoal under a pressure of isAP EAMCET 2021 Easy
- If \(\overline{\mathrm{a}}=\overline{\mathrm{i}}+p \overline{\mathrm{j}}-3 \overline{\mathrm{k}}, \overline{\mathrm{b}}=p \overline{\mathrm{i}}-3 \overline{\mathrm{j}}+\overline{\mathrm{k}}, \overline{\mathrm{c}}=-3 \overline{\mathrm{i}}+\overline{\mathrm{j}}+2 \overline{\mathrm{k}}\) are three vectors such that \(|\overline{\mathrm{a}} \times \overline{\mathrm{b}}|=|\overline{\mathrm{a}} \times \overline{\mathrm{c}}|\), then \(\mathrm{p}=\)AP EAMCET 2025 Medium