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Start learning 50% faster. Sign in nowExpenditure of P = Rs.(20000 – 12000) = Rs.8000 New Saving = (0.6 × 20000 - 0.7 × 8000) = 12000 - 5600 = Rs.6400 Decrease % in Saving = [(12000 - 6400)/12000] × 100 = 47%
Which of the following is not an insulator?
Two capacitors of 6 µF and 3 µF are connected in series and a potential difference of 90 V is applied. The energy stored in the system is:
How does the angle of minimum deviation of a glass prism of refractive index 1.5 change, if it is immersed in a liquid of refractive index 1.25?
A parallel plate capacitor is half-filled with a dielectric slab (K = 4). What is its effective capacitance, assuming plate separation d?
Two wires made of the same material have lengths in the ratio 1:2 and diameters in the ratio 2:1. If the same force is applied to both, what is the rat...
A ray of light is incident on a transparent medium at an angle of 60°. The reflected ray of light is found to be completely Q.4 polarized. Then, the r...
The velocity of heat radiation in a vacuum is?
What is the rate of change of momentum called?
In a long solenoid of 200 turns/cm carrying a current i, the magnetic field at center is 6.28×10-2 T. If a second solenoid with 100 turns/c...
The current across the 3 ohm resistance in the given circuit is:
