✓ Board-verified
Science · 2025 · 2 marks
CBSE 2025 · Region 2 · Set 2 · Q26
An electric fuse is rated 8 A. Can it be used with an electrical appliance of rating 5 kW, 200 V? Justify your answer.
An electric fuse is rated $\displaystyle 8$ A. Can it be used with an electrical appliance of rating $\displaystyle 5$ kW, $\displaystyle 200$ V ? Justify your answer.
Marking-scheme solution
\(\displaystyle \mathrm{P}=5 \mathrm{~kW}, \mathrm{~V}=200 \mathrm{~V}\)
Current drawn by electrical appliance \(\displaystyle =\mathrm{I}=\frac{P}{V}\)
\[=\frac{5000}{200}=25 \mathrm{~A}
\]
No, The given electric fuse cannot be used The fuse will melt and appliance stops working.
More from Electricity
- (i) Consider the following electric circuit: Calculate the values of the following: (I) Total resistance of the circuit. (II) The total electric…2026
- A 2000 W heater has a resistance of about 25 Ω, whereas a 100 W bulb has a resistance of 500 Ω. When 220 V is applied on these, then which of the two…2024
- Show how you would connect three resistors each of resistance 6 Ω, so that the combination has a resistance of 9 Ω. Also justify your answer. OR In…2024
- In domestic electric circuits the wiring with 15 A current rating is for the electric devices which have2023
- Assertion: Electrons move from lower potential to higher potential in a conductor. Reason (R): A dry cell maintains electric potential difference…2024
- (i) State whether the currents and potential difference in all the bulbs will be same or different when in a circuit three bulbs of: same wattage are…2024
- Consider two lamps A and B of rating 50 W; 220 V and 25 W; 220 V respectively. Find the ratio of the resistances of the two lamps (i.e. R_A: R_B ).…2025
- Study the given electric circuit in which 2 A electric current is flowing between points X and Y. (i) Using the battery, key, voltmeter and ammeter…2026
CBSE Class 10 Science past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.