Monthly savings and expenditure of A initially is Rs. 2340 and Rs. 4160, respectively. Monthly expenditure of A now = 0.65 × 4160 = Rs. 3159 Monthly savings of A now = 1.35 × 2340 = Rs. 2704 Monthly income of A now = 3159 + 2704 = Rs. 5863 Desired percentage decrease = [(6500 – 5863)/6500] × 100 = 9.8%
__________ is the metal used for making the filament of the light bulb.
Tape recorder should not be kept near one of the following things –
If the phase difference between two points is 120° for a wave with velocity of 360 m/ and frequency 500 Hz, then path difference between the two point...
Which law states that the ratio of the potential difference across a conductor to the current through it is constant, provided the temperature remains c...
The sharpness of a television image is termed as its –
Match the following machines with their working principles:
(i) Electric motor - (a) Heat energy into mechanical energy
(ii) Steam engin...
When white light passes through a glass prism, which color deviates the least?
A beam of light consisting of two wavelengths, 600 nm and 420 nm, is used to obtain interference fringes in a Young’s double-slit experiment. Find...
A ray of light passing through an equilateral triangular glass prism from air undergoes minimum deviation when angle of incidence is 75% of the angle o...
A porter lifts luggage of 20 kg from the ground and puts it on his head 2 m above the ground. Calculate the work done by him on the luggage (take g = 10...
