Question
Nisha uses up 74% of her income on expenses and saves Rs.
4,940. Find the income of her sister who earns 10% more than Nisha.Solution
ATQ,
Income of Nisha = (4,940 / 0.26) = Rs. 19,000
So income of sister = 1.10 × 19,000 = Rs. 20,900
Which of the following materials is used for the generation of ultrasonic waves by using magnetostriction effect?
Tungsten is used for the manufacture of the filament of an electric bulb, because –
A light ray enters a glass slab from air at 60° incidence. If refractive index of glass is √3, what is angle of refraction?
What does Ohm's Law state? Â
Which of the following is NOT a non-contact force?
A plane mirror is placed on a wall. A man walks directly toward the mirror at 2 m/s. The speed at which his image approaches him is:
Which of the following statement is correct?
I. Magnetite is a natural magnet
II. A freely suspended magnet always aligns in N-S direction
A car moving at 72 km/h is brought to rest in 10 seconds. What is its acceleration? Â
Which of the following is a characteristic of a conductor? Â
The force that resists the motion of a body sliding over a surface is called:
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